Method of determining characteristics of pore volume and thermal conductivity of matrix of porous materials

FIELD: measuring equipment.

SUBSTANCE: for determining the characteristics of pore volume and thermal conductivity of matrix of samples of porous materials, the sample of porous material is alternately saturated with at least two fluids with different known thermal conductivity. As at least one saturating fluid a mixture of fluids from at least two fluids with different known thermal conductivity is used. After each saturation of the sample the thermal conductivity of the saturated sample of the porous material is measured, and the characteristics of pore volume and thermal conductivity of the matrix of the sample of porous material is determined taking into account the results of thermal conductivity measurements.

EFFECT: increased accuracy and stability of determining the characteristics of the pore volume and the thermal conductivity of the test samples.

14 cl, 2 dwg

 

The technical field

The invention relates to the field of study of the physical properties of heterogeneous porous materials, namely, the characterization of the pore space and thermal conductivity of the matrix (space filled only solid substance) of these materials.

For heterogeneous porous materials can include, for example, industrial materials, unconsolidated and consolidated rock samples and minerals.

The level of technology

There is a method of determining the characteristics of the pore space and thermal conductivity of the matrix for the sample of porous material by measuring thermal conductivity of the sample, consistently busy three fluids with different thermal conductivity (Popov et al. Interrelations between thermal conductivity and other physical properties of rocks: experimental data. Pure and Appl. Geophys., 160, 2003, p.p.1137-1161). The method is based on determining the porosity of a sample of porous material, thermal conductivity of the matrix and forms of pores and cracks, which are modeled by ellipsoids of rotation and are characterized by the aspect ratio. The porosity of a sample of porous material, thermal conductivity of the matrix and the aspect ratio of the ellipsoids, simulating the pores and cracks, are determined by solving a system of three nonlinear equations with three unknowns using measurements of thermal conductivity on the sample of porous material, the reproduction is consequently busy three fluids with known different conductivity. The equations in this system are of equal theoretical and experimental values of thermal conductivity of samples of porous material, consistently busy three fluids with known different conductivity. theoretical values of thermal conductivity is determined using a known method of self-consistency of theory of efficient environments, which allows to Express thermal conductivity of a porous material, depending on thermal conductivity of the matrix, the fluid filling the pores and cracks, porosity and aspect ratios of the ellipsoid. The disadvantages of this method are as follows: (1) use the same aspect ratio for the characteristic shape as long and cracks, aspect ratio which in fact differs by several orders of magnitude, (2) the method requires sequential saturation of the sample of porous material in three different fluids, thermal conductivity of which must meet the following three conditions: a) it must be known for each fluid, b) she should have significantly different values, each of which should be selected in advance in accordance with specific requirements in accordance with the conductivity, porosity and characteristics of the pore space of the studied porous heterogeneous materials C) thermal conductivity data Tr is x fluids must be in a specific range of values, want to select in advance depending on thermal conductivity, porosity and characteristics of the pore space of the studied porous heterogeneous materials. The last three conditions is a serious problem because of the lack of ready fluids in nature. In addition, the disadvantage of this known method is not accurate characterization of the pore space and thermal conductivity of the matrix due to the fact that only limited measurements of thermal conductivity of fluid-saturated porous heterogeneous material and not use the results of additional measurements of other physical properties, which may include, for example, longitudinal or transverse elastic wave velocities, electrical conductivity, hydraulic and dielectric constant, density, volumetric heat capacity.

The closest analogue of the claimed method is a method of determining the characteristics of the pore space and thermal conductivity of the matrix (Popov et al. Physical properties of rocks from the upper part of the Yaxcopoil-1 drill hole, Chicxulub crater. Meteoritics &Planetary Science 39, Nr 6, 2004, p.p.799-812), which consists in the successive saturation of the sample of porous material at least two fluids with different known thermal conductivity and the determination of the porosity of the sample. After each saturation of the sample p is ristoro material fluid conducting the measurement of thermal conductivity of the sample. Collectively, the results of measurements of thermal conductivity and porosity of the sample of porous material at a known value to determine the characteristics of the pore space and the conductivity matrix of the sample of porous material.

The disadvantages of this method is the following: (1) more than two unknown quantities are determined from only two measurements of thermal conductivity, which leads to the possibility of the existence of a fairly wide area of different solutions for the characteristics of the pore space and thermal conductivity of the matrix; (2) the porosity must be known in advance; (3) the method requires sequential saturation of the sample of porous material in two different fluids, thermal conductivity of which must meet the following two conditions: a) it must be known for each fluid, b) she should have significantly different values in the range that should be selected in advance in accordance with the conductivity, porosity and characteristics of the pore space of the studied porous heterogeneous materials. The last two conditions is a serious problem because of the lack of ready fluids in nature. In addition, the disadvantage of this known method is not accurate characterization of the pore space and thermal conductivity of the Mat is itzá, in the that is limited only by the measurement of thermal conductivity of fluid-saturated porous heterogeneous material and not use the results of additional measurements of other physical properties, which may include, for example, longitudinal or transverse elastic wave velocities, electrical conductivity, hydraulic and dielectric constant, density, volumetric heat capacity.

Disclosure of inventions

Technical result achieved during the implementation of the present invention is to improve the sustainability of the characterization of the pore space and thermal conductivity of the matrix due to the use as an additional nourishing substances mixtures of two or more fluids with different thermal conductivity. This leads to the possibility of saturation of the studied porous heterogeneous materials fluids with pre-defined thermal conductivity and increase the number of experimental values of the physical properties (thermal conductivity and other properties, including, for example, elastic wave velocities, electrical conductivity, hydraulic and dielectric constant, density, volumetric heat capacity, which are used to determine unknown parameters - characteristics of the pore space and thermal conductivity of the matrix. The conductivity brewed this about what atom mixtures can be determined by measurement or by calculation) and known for each mixture. In addition, the conductivity of such mixtures can have significantly different values, each of which may be selected in advance in accordance with specific requirements in accordance with the conductivity, porosity and characteristics of the pore space of the studied porous heterogeneous materials. In addition, it may be made a condition under which thermal conductivity data of mixtures of fluids is in a certain range of values that can be selected in advance depending on thermal conductivity, porosity and characteristics of the pore space of the studied porous heterogeneous materials. The possibility of increasing the number of nourishing substances through the use of mixtures of two or more fluids of different, including pre-defined, the conductivity also allows you to not require that the porosity of the porous material was known in advance, and to include it among the determined values along with the characteristics of the pore space and the conductivity of the matrix.

This technical result is achieved due to the fact that the sample of porous material alternately saturate at least two fluids with different known conductivity, and as at least one saturated fluid, a mixture of fluids from at least two f is widow with different known conductivity. After each saturation of the sample is measured saturated conductivity of the sample of porous material and define the characteristics of the pore space and thermal conductivity of the matrix of the sample of porous material based on the results of measurements of thermal conductivity. Characteristics of the pore space include porosity and geometrical parameters of the pore space. In another embodiment of the invention the porosity of the samples of porous materials can be determined in advance.

thermal conductivity of the mixture of fluids can be determined in advance according to the known values of thermal conductivity of each of the mixed fluids and volumes or masses of mixed fluids. In accordance with another embodiment of the invention, the conductivity of the mixture of fluids can be determined by measuring thermal conductivity of the mixture after mixing of fluids.

In accordance with another embodiment of the invention, thermal conductivity or the range of thermal conductivity of the mixture of fluids set in advance.

As fluids can be used with oil and water.

As at least one of the fluid mixture can be used a gas with a known thermal conductivity, for example, air. When using at least two mixtures of fluids containing gas with a known t what proposedvalue, different thermal conductivity of the mixtures provided by the use of the same gas with different humidity.

In accordance with one embodiments of the invention pre-determine the required values of thermal conductivity of the fluid, the number of prepared mixtures of fluids and thermal conductivity values prepared mixtures of fluids.

In accordance with another embodiment of the invention after each saturation of the sample of porous material is measured at least one physical property of a sample, and the results of the determination of additional physical properties of the sample of porous material is used together with the results of determination of thermal conductivity of the sample of porous material for the characterization of the pore space and thermal conductivity of the matrix of the sample of porous materials.

Additionally is determined by the physical property of a sample of porous material may be at least one property from the following groups: elastic wave velocities, electrical conductivity, permeability, density, volumetric heat capacity.

The saturated conductivity of the sample can be determined by optical scanning.

Brief description of drawings

The invention is illustrated by drawings, shown in figure 1 and figure 2. Figure 1 illustrates the location is adelene volume of voids on the aspect relationship, built on detected parameters of the Beta distribution (α=3.0, β=1.1), when the porosity of the sample was unknown, and was the target parameter along with the Beta distribution and matrix conductivity. Figure 2 shows the distribution of volume of voids on the aspect of otnosheniy built on detected parameters of the Beta distribution (α=7.1, β=1.8), in the case where the porosity of the sample was known in advance.

The implementation of the invention

In accordance with the proposed method, in addition to the saturation of the sample of porous material one or more fluid with a known conductivity and conducted following this, the measurement of thermal conductivity of saturated porous sample material the sample is saturated with at least one mixture of two or more fluids with a variety of known thermal conductivity. Every time after saturation of the sample of porous material measure its conductivity. The measured values of thermal conductivity of the sample of porous material saturated with one or more mixtures of two or more fluids are used to determine the characteristics of the pore space and thermal conductivity of the matrix of the sample of porous material. Characteristics of the pore space include porosity and geometrical parameters of the pore space (for example, TSA is ktoe the ratio of the ellipsoids, modeling of emptiness, the parameters of the distribution function of the aspect ratios of the pores and cracks or any other quantities characterizing the shape of the pores and cracks, the amount, orientation, or size).

Porosity, geometrical parameters of the pore space and the conductivity matrix for the sample of porous material is determined so that the discrepancy between experimental values of thermal conductivity obtained at each saturation of the sample of porous material, and theoretical values of thermal conductivity of the sample of porous material does not exceed the specified value. theoretical value of thermal conductivity of the sample of porous material, depending on the porosity of the geometrical parameters of the pore space and thermal conductivity of the matrix is determined using known relationships between thermal conductivity of the sample of porous material with a porosity values, geometrical parameters of the pore space and thermal conductivity of the matrix. For example, for this purpose can be used with the known composition of methods of theory of efficient environments, is shown below.

Let the measurement of thermal conductivity are carried out in a direction that is specified in the master coordinate system by the vector n=(n1n2n3). The main coordinate system is defined by the elements of symmetry the sample of porous material and the effective conductivity tensor is diagonal. Then in this direction, thermal conductivity is determined by the known formula:

λ*(n)=λij*ninj=λ11*n12+λ22*n22+λ33*n32,(1)

where λ*effective conductivity tensor in the principal coordinate system associated with the porosity ϕ, geometrical parameters of the pore space defined by the tensor g and the tensor of thermal conductivity of the matrix λMas follows (Popov et al., Interrelations between thermal conductivity and other physical properties of rocks: experimental data. Pure Appl. Geophys., 160, 2003, pp.1137-1161):

λ*=[(1-φ)λM(mi> r)[I-gM(λM(r)-λc)]-1+φλF(r)[I-gF(λf(r)-λc)]-1]×[(1-φ)[I-gM(λM(r)-λc)]-1-1+φ[I-gF(λF(r)-λc)]-1]-1./mtext> (2)

In the formula (2) the angular brackets denote volume averaging, which in the case of statistically homogeneous medium can be replaced by statistical averaging over the ensemble.λF(r)the tensor of thermal conductivity of the fluid at the point r of the sample porous-fractured material; I is the unit matrix. The components of the tensor g have the form

gkl=-14πnklΛ-1dΩ, (3)

where nkl≡nknl,,,, dΩ≡sinθdθdφ, and ai- axis ellipsoids, modeling of grain minerals (index M), pores and cracks (index F);ΛXijcninj, θ, and φ is the polar and azimuthal angle in spherical coordinate system. λc- the tensor of thermal conductivity compared body. Different choices of body comparison leads to different formulas, methods of theory of effective environments, including the self, assuming λc*(Popov et al. Interrelations between thermal conductivity and other physical properties of rocks: experimental data. Pure Appl. Geophys., 160, 2003, pp.1137-1161), the method Hasina-Shtrikman (Bayuk I., Gay J, Hooper J, and Chesnokov, E. Upper and lower stiffness bounds for anisotropic porous rocks, Geophysics Journal International, 175, 2008, pp.1309-1320), in which properties of the body comparison I think is equal to the properties of mineral substances or fluid, depending on the internal structure of the breed. The choice of body comparison in the form λc=(1-f)λM+fλFwhere f is some constant that allows to take into account the degree of connectivity of porous-fractured protrans the VA (Bayuk I. and Chesnokov, E. Identification of the fluid type in a reservoir rock, Journal of the Solid Earth, 35, Nr. 11, 1999, pp.917-923).

Determination of the porosity, the geometrical parameters of the pore space and thermal conductivity of the matrix for the sample of porous material according to the results of measurements of thermal conductivity of fluid-saturated sample of porous material can be provided, for example, by minimizing the function, which characterizes the degree of deviation of theoretical thermal conductivity values from the experimental values of thermal conductivity obtained for the sample of porous material at each saturation. This function can be, for example, the sum of squared differences or sum of modules of the deviations of theoretical and experimental values of thermal conductivity, and the summation is carried out according to the number of measurements of thermal conductivity of the sample saturated porous material. Another example of finding solutions for porosity, geometrical parameters of the pore space and thermal conductivity of the matrix for the sample of porous material is the accumulation of all values of porosity, geometrical parameters of the pore space and thermal conductivity of the matrix, which provide the divergence of theoretical and experimental values of thermal conductivity obtained for the sample of porous material at each saturation, not exceeding a certain weight is the given value, and the subsequent calculation of the statistical characteristics for the accumulated values of porosity, geometrical parameters of the pore space and thermal conductivity of the matrix of the sample of porous material.

When one of the embodiments of the invention thermal conductivity of a mixture of two or more fluids is determined by the known values of thermal conductivity of each of two or more miscible fluids and volumes or masses of mixed fluids. Such determination of thermal conductivity of a mixture of N fluids can be carried out, for example, using the so-called theoretical model average. This model has the form (U.S. Patent No. 5159569. Formation evaluation n-om thermal properties. H. Xu and R. Desbrandes, 1992):

,

where λmix- thermal conductivity of a mixture of N fluid, N is the number of mixed fluids, Sfluidthe relative volumetric content of the i-th fluid in a mixture of fluids, λfluid- thermal conductivity of the i-th fluid.

In order to make less difficult the preparation of mixtures of two or more fluids with a specific, fixed thermal conductivity of the mixture, prepare a mixture of at least two fluids, and then after cooking each such mixture experimentally determine the value of its thermal conductivity. Determination of thermal conductivity of the prepared mixture can be done any the m of the standard methods, designed for measuring thermal conductivity of fluids, for example, by means of the device "thermal conductivity Analyzer DTC-25"manufactured by the company Intertech Corporation (USA).

Possible variant implementations of the invention, when additionally, for each of the prepared mixtures of two or more fluids pre-set the desired value of thermal conductivity or the range of conductivity of the prepared mixtures. thermal conductivity or the range of thermal conductivity of each mixture set according to the required difference teploprovodnosti one or more saturating fluids and different mixtures. The necessary difference teploprovodnosti saturating fluid and mixtures are chosen so as to ensure sustainable solution to determine the porosity, the geometrical parameters of the pore space and thermal conductivity of the matrix for the sample of porous material according to the results of measurements of thermal conductivity of fluid-saturated porous sample material and the required accuracy of determining the porosity, the geometrical parameters of the pore space and thermal conductivity of the matrix of the sample of porous material.

The invention can be implemented in such a way that at least one of the fluids in the preparation of the mixture of fluids using gas or different gases. As gas can be used for the van the air.

In the latter case, the possible implementation of the invention in such a way that variations in the conductivity of the prepared mixture of the source of fluid and gas with a known conductivity and obtaining the necessary values of thermal conductivity of the mixture provided by changes in moisture source gas, further saturating the gas with one or more fluids.

In accordance with one embodiments of the invention in advance, taking into account thermal conductivity of one or more saturating fluids, determine the required values of thermal conductivity of two or more source miscible fluids, the number of prepared mixtures of the source fluid and the required values for thermal conductivity of prepared mixtures of the source fluids, based on the stability of solution of the inverse problem of the characterization of the pore space and thermal conductivity of the matrix of the sample of porous material and the accuracy of measurements of thermal conductivity of fluids, mixtures of fluids and a sample of porous material after each saturation. The necessary thermal conductivity values of the two source fluids, the number of prepared mixtures of the source fluid and the values of thermal conductivity of prepared mixtures of the source fluid can be determined, for example, requiring the simultaneous performance of the following three conditions. First the m condition is thermal conductivity of mixtures of selected fluids should differ by an amount exceeding the accuracy of the measurement of thermal conductivity in the method used for measuring thermal conductivity of mixtures of two selected fluids. For example, when using the line source that provides measurements of thermal conductivity of fluids with an error of 10%, thermal conductivity of mixtures of selected fluids should vary more than 10%. The second condition is that the values of thermal conductivity of the sample of porous material at each saturation calculated theoretical method, which is used to characterize the pore space and thermal conductivity of the matrix of the sample of porous material, must differ by an amount exceeding the accuracy of the measurement of thermal conductivity in the method used to measure thermal conductivity of the sample saturated porous material. For example, theoretical thermal conductivity values calculated for the sample of porous material saturated with different mixes two fluids must differ by more than 3%, if to measure thermal conductivity of the sample of porous material is used a method of optical scanning accuracy measuring method of optical scanning is 2-3%). The third condition is that two or more flue is s, used for the preparation of saturated mixtures, chosen so that the values of their thermal conductivity was provided by the existence of at least one mixture of two or more fluids that satisfy the first and second conditions.

In accordance with another embodiment of the invention additionally determine the porosity of a sample of porous material. Porosity determined before or after measurements of thermal conductivity of the sample of porous material, consistently saturated by one or more fluids and at least one selected mixture fluid with a known conductivity. The measured values of thermal conductivity for the sample of porous material at each saturation and a known value of porosity of the sample of porous material is used to determine the geometric characteristics of the pore space and thermal conductivity of the matrix of the sample of porous material, using known relationships between the measured value of thermal conductivity with the known values of porosity, thermal conductivity of fluids and one or more mixtures of fluids, the desired geometrical characteristics of the pore space and the conductivity matrix of the sample.

The method may further include measuring one or more physical its the TV sample of porous material after each saturation of the sample of porous material is a fluid or mixture of fluids of known conductivity. Such physical properties can be, for example, elastic wave velocities, electrical conductivity, dielectric or hydraulic permeability, density, volumetric heat capacity. After that, the results of determining one or more physical properties of a sample of porous material is used together with the results of determination of thermal conductivity characterization of the pore space and thermal conductivity of the matrix of the sample of porous material. For this purpose, in addition to the relations (1)-(3)linking the measured conductivity and geometrical parameters of the pore space, porosity and conductivity of the matrix, using the same ratios of theory of effective environments to associate the measured physical property with geometrical parameters of the pore space, porosity and relevant physical properties of the matrix. When this formula for any effective transport properties (conductivity, dielectric and hydraulic conductivity) are similar to the formulas (1)to(3) for the effective thermal conductivity with the replacement of the tensor of thermal conductivity to the conductivity tensor, the dielectric or hydraulic permeability.

If the measured elastic wave velocities, the equations linking the measured speed of the elastic in the LF with the characteristics of the pore space and the conductivity of the matrix, have the following form. If measurements of elastic wave velocities are conducted in a certain direction, which is set in the main coordinate system by the vector n=(n1n2n3), at the values of elastic waves velocities are determined by the density and the effective tensor of elasticity on the well-known equation green-Christoffel:

det(Gik-e(υ(n))2δik)=0,(4)

where

Gik=Cijkl*njnl.what is (5)

In formulas (4) and (5) ν(n)- the speed of longitudinal or transverse waves in the direction n, ρ is the density, δiksymbol is Kronecker,Cijkl*- effective components of the tensor of elasticity. The effective tensor of elasticity is determined by a formula similar to formula (2), with the replacement of the conductivity tensors to tensors of elasticity, a single tensor of the second rank unit tensor of the fourth rank tensor g of the second rank tensor g fourth grade, which is

,

ΛklCkmln*nmnnmn≡nmnn,,,.

If the measured volumetric heat capacity or porosity along the sample porous-fractured material, the ratio between the measured values and corresponding values of the matrix saturating the of luida and porosity have

(cρ)(n)=(cρ)*=(1-φ)(cρ)M+φ(cρ)F,(7)

ρ(n)=ρ*=(1-φ)ρM+φρF.(8)

Volumetric heat capacity and porosity do not depend on the geometrical parameters of the pore space.

Determination of the porosity, the geometrical parameters of the pore space and the conductivity matrix for the sample of porous material can be provided, for example, by minimizing the function, which characterizes the degree of deviation of theoretical values of the measured conductivity and other physical properties from the experimental values of thermal conductivity and other measured physical quantities obtained for the sample at each saturation. This function can be, for example, the sum of the squares of the relative deviations or the sum of the moduli of the relative deviations of theoretical and experimental values of thermal conductivity and other physical quantities. When this summation is the number of measurements of the physical properties. Another example of finding solutions for porosity, geometrical parameters of the pore space and thermal conductivity of the matrix for the sample of porous material is the accumulation of all values of porosity, geometrical parameters of the pore space and thermal conductivity of the matrix, which provide the divergence of theoretical and experimental values of thermal conductivity and other physical quantities obtained on the I sample at each saturation, less than some specified value, and the subsequent calculation of the statistical characteristics for the accumulated values of porosity, geometrical parameters of the pore space and thermal conductivity of the matrix.

As an example implementation of the invention in accordance consider the case where the characterization of the pore space and thermal conductivity of the matrix must be performed on a sample of carbonate reservoir with a diameter of 5 cm and a length of 5 cm as the saturating fluid is selected oil and water, the conductivity of which 0.6 and 0.12 W/(m·K). Was prepared five mixtures of these fluids in proportion water/oil", with values of 0.9/0.1 (mixture 1), 0.6/0.4 (mix 2), 0.4/0.6 (mix 3), 0.2/0.8 (mixture 4) and 0.0/1.0 (mixture 5). thermal conductivity of mixtures of the two fluids is measured by the method of linear source and the measurement result is equal to 0.50, 0.30, 0.22, 0.15 and 0.12 W/(m·K) for compounds 1-5, respectively. The difference values of thermal conductivity of mixtures of more than 15%, which exceeds the accuracy of the linear source (10%). The sample sequentially saturated under vacuum to each of these mixtures. Vacuum unit is used with the aim of fully saturated water related cracks and pores. After each saturation measured thermal conductivity of fluid-saturated sample by optical scanning. After each measurement of Teplopribor the STI pattern is extracted (oil removal) and dried to 105°C. Then the saturation of the following mixture. The measured conductivity of the sample, saturated mixtures 1-5 equals 2.19, 2.04, 1.93, 1.83 and 1.77 W/(m·K), respectively. The difference values of thermal conductivity of the sample saturated with various mixtures exceeds the accuracy of the linear source (2-3%). The obtained values of thermal conductivity are used to determine the geometrical parameters of the pore space, porosity and thermal conductivity of the matrix. The form of cracks and pores depends on the value of g in equation (3), is modeled as an ellipsoid of rotation, which are characterized by the aspect ratio. In this case it is convenient to use the depolarization factor D, which is associated with the aspect ratio according to the formulaD=1-D32. For elongated ellipsoids with aspect ratio κ greater than 1, the following relation holds : D3=(1-e2)Arth(e)-ee3,e=K2-1 K2and for spljusnutyj ellipsoids with aspect ratio κ, less than or equal to 1,D3=(1+e2)e-arctg(e)e3,e=[1-K2K2]1/2. The size distribution of cracks and pores on the depolarization factor describes deparametrization Beta distributionP(F)=G(α+β)G(α)G(β)Fα-1(1-F)β-1whereIis the gamma function. The parameters of the Beta distribution and patriziale and are assumed to be unknown. Because the rock is isotropic, then the orientation of the cracks and pores is chaotic.

Unknown values included in the formula (2)are the two parameters of the Beta distribution, thermal conductivity of the matrix and the open porosity. To find the solution set of the domain of possible changes to each of the unknown quantities. For each of the parameters of the Beta distribution, this area changes is the interval [0,0001; 100]. For this sample the range of variation of porosity is chosen equal to 15-25%, based on logging data on porosity for depth interval from which the sample was extracted. Matrix conductivity different from thermal conductivity determined by the mineral composition, as carbonate reservoir may contain isolated pores, and also the remains of organic matter and capillary water. Change of matrix thermal conductivity is in the range of its possible values of 2.5-3.5 W/(m·K). Unknown parameters of the Beta distribution, thermal conductivity of the matrix and the open porosity is determined by minimization of the sum of the relative residuals of theoretical and experimental values of thermal conductivity obtained for each of the saturating fluid. To minimize the used version of the simplex method, allowing to take into account the range of possible changes sought PA is amerov. Figure 1 shows the distribution of volume of voids on the aspect relationships, based on detected values of the parameters of the Beta distribution. Found value matrix thermal conductivity equal to 2.96 W/(m·K), and an open porosity of 20%. Found the value of open porosity matches the value of porosity, which was then measured for this sample by the method of Archimedes to test the proposed method.

thermal conductivity of the mixture of fluids (e.g. water and oil) can be calculated by a known method of Lichtenecker (Lichtenecker, K. and .Rother, "Die Herleitung des logarithmischen Mischungsgesetzes aus allgemeinen Prinzipien des stationaren StrOmung", Phys. Zeit, 1931, 32, 255-260).

The mixture of fluids can be made so that thermal conductivity values of the mixtures did not exceed half the value of thermal conductivity calculated using the known values of thermal conductivity and volumetric concentration of the component composing the matrix. To calculate this value of thermal conductivity using a known method of Lichtenecker.

When using air as a source of fluids can be made a few mixes by humidity changes so that thermal conductivity values of the mixtures differed not less than 10%.

Pre-t thermal conductivity of the matrix can be estimated using the known values of those is doprovodnou and volumetric concentration of the component, composing the matrix. To do this, use a known method of Lichtenecker. Then choose the source saturating fluids so that the conductivity of one of the fluids is different from the estimated values of thermal conductivity of the matrix is not less than an order of magnitude, and thermal conductivity of the second fluid is not less than five times. The porosity of the sample is not less than 10%. The values of thermal conductivity of fluids differ by more than two times. Make one or more mixtures of these two fluids so that thermal conductivity of each mixture is not less than 15% of thermal conductivity of any other mixtures and pure fluids. This value exceeds the precision of the measurement of thermal conductivity of the fluid by the method of linear source (10%). Thus the conductivity of each mixture is not less than twice the estimated values of thermal conductivity of the matrix. This contrast properties of the saturating fluids and their mixtures provides the difference of the values of thermal conductivity of the sample of porous material saturated with every fluid and mixtures thereof or mixtures clearly exceeds the accuracy of the measurement of thermal conductivity by the method of optical scanning (2-3%), which is used for measuring thermal conductivity of the saturated sample of porous material. Meaningful difference values of thermal conductivity of the sample of porous material saturated with CA is the smoke fluid and mixtures thereof or mixtures leads to a sustainable solution of the inverse problem of the characterization of the pore space and thermal conductivity of the matrix of the sample of porous material.

As another example, implementations of the invention, consider the case when the sample carbonate reservoir of known porosity. Measurements of thermal conductivity are performed for the same sample and with the same saturating mixture of the two fluids (water and oil), as in the previous description of the example implementation. thermal conductivity of mixtures of fluids, as in the previous example implementation, measured by the method of linear source. The porosity measured by the method of Archimedes, is 20%. Unknown values included in the formula (2)are the two parameters of the Beta distribution and thermal conductivity of the matrix, which are found by minimization of the sum of the relative residuals of theoretical and experimental values of thermal conductivity obtained for each of the saturating fluid. Found value matrix thermal conductivity equal to 2.98 W/(m·K). The distribution of volume of voids on the aspect relationships, based on detected values of the parameters of the Beta distribution, shown in figb.

In addition to thermal conductivity can be measured, for example, the longitudinal and transverse elastic wave velocities and electrical conductivity of the sample. The measured mn of the treatment used together to characterize the pore space and thermal conductivity of the matrix.

1. The method of determining the characteristics of the pore space and thermal conductivity of the matrix of the samples of porous materials, in accordance with which in turn saturate the sample of porous material at least two fluids with different known conductivity, and as at least one saturated fluid, a mixture of fluids from at least two fluids with different known conductivity after each saturation of the sample is measured saturated conductivity of the sample of porous material, define the characteristics of the pore space and thermal conductivity of the matrix of the sample of porous material based on the results of measurements of thermal conductivity.

2. The method of determining the characteristics of the pore space and thermal conductivity of the matrix of the samples of porous materials according to claim 1, whereby the characteristics of the pore space include porosity and geometrical parameters of the pore space.

3. The method of determining the characteristics of the pore space and thermal conductivity of the matrix of the samples of porous materials according to claim 1, according to which pre-determine the porosity of the samples of porous materials.

4. The method of determining the characteristics of the pore space and thermal conductivity of the matrix of the samples of porous materials according to claim 1, CE is provided which pre-determine thermal conductivity of the mixture of fluids using the known values of thermal conductivity of each of the mixed fluids and volumes or masses of mixed fluids.

5. The method of determining the characteristics of the pore space and thermal conductivity of the matrix of the samples of porous materials according to claim 1, according to which pre-determine thermal conductivity of the mixture of fluids by measuring thermal conductivity of the mixture after mixing of fluids.

6. The method of determining the characteristics of the pore space and thermal conductivity of the matrix of the samples of porous materials according to claim 1, whereby the mixture of fluids pre-set value of thermal conductivity or the range of thermal conductivity of prepared mix.

7. The method of determining the characteristics of the pore space and thermal conductivity of the porous matrix material according to claim 1, whereby as fluid using oil and water.

8. The method of determining the characteristics of the pore space and thermal conductivity of the matrix of the samples of porous materials according to claim 1, according to which as at least one of the fluid mixture using a gas with a known conductivity.

9. The method of determining the characteristics of the pore space and thermal conductivity of the matrix of the samples of porous materials according to claim 8, whereby when using at least two mixtures of fluids containing gas with a known conductivity, different thermal conductivity of the mixtures provided by the use of one is the same gas with different humidity.

10. The method of determining the characteristics of the pore space and thermal conductivity of the matrix of the samples of porous material of claim 8 or 9, according to which as a gas with a known conductivity using the air.

11. The method of determining the characteristics of the pore space and thermal conductivity of the matrix of the samples of porous materials according to claim 1, according to which pre-determine the required values of thermal conductivity of the fluid, the number of prepared mixtures of fluids and thermal conductivity values prepared mixtures of fluids.

12. The method of determining the characteristics of the pore space and thermal conductivity of the matrix of the samples of porous materials according to claim 1, whereby after each saturation of the sample of porous material is measured at least one physical property of a sample, and the results of the determination of additional physical properties of the sample of porous material is used together with the results of determination of thermal conductivity of the sample of porous material for the characterization of the pore space and thermal conductivity of the matrix of the sample of porous materials.

13. The method of determining the characteristics of the pore space and thermal conductivity of the matrix of the samples of porous materials indicated in paragraph 12, in accordance with which additionally determined the most physical property of a sample of porous material is at least one property from the following groups: elastic wave velocities, the conductivity, permeability, density, volumetric heat capacity.

14. The method of determining the characteristics of the pore space and thermal conductivity of the matrix of the samples of porous materials according to claim 1, whereby thermal conductivity of the saturated sample is determined by the method of optical scanning.



 

Same patents:

FIELD: instrument engineering.

SUBSTANCE: device for measuring thermal conductivity of porous bodies fluid-saturated under pore pressure of up to 100 MPa and temperatures of 200÷500 K, implementing the stationary method of a flat layer in which the heater and the refrigerator are constructive force elements of the measuring autoclave. The sample is placed between the heater and the refrigerator using liners of plastic material to provide thermal contact between them. The device also comprises a tube for vacuum pumping of the cavity with the sample. The walls of the cavity containing the sample are made preliminary polished.

EFFECT: improving the accuracy of measurement of thermal conductivity of fluid-saturated porous bodies.

3 cl, 1 dwg

FIELD: physics.

SUBSTANCE: efficiency factor of super-thin liquid heat-insulating coatings is determined using a multilayer plane-parallel wall. The problem is solved based on the principle of determining specific heat flow with and without insulation and using the formula ηi=1qwithiqwithacti to find the efficiency factor of super-thin liquid heat-insulating coatings.

EFFECT: enabling determination of the efficiency factor of heat insulation in conditions imitating operation of heat insulation in real conditions.

1 dwg

FIELD: heating.

SUBSTANCE: essence of the claimed method consists in formation of the desired thermal condition of a solid body by non-contact one-way non-destructive heat impact on the surface of the latter by means of a source of infrared radiation in the laboratory and experimental conditions. The onset moment of steady-state thermal condition of the solid body is set by the analytical method. Upon reaching the steady-state thermal condition the temperature fields of surfaces of the solid body are simultaneously recorded with a non-contact temperature measuring instrument and a mirror reflector which field of vision comprises the rear surface of the solid body. The heat flow density in the direction towards the front surface of the solid body from a source of infrared radiation is fixed with a heat gauge mounted on the front surface of the solid body under study. Experimental estimated determination of the coefficient of thermal conductivity of a solid body is carried out in the zone of steady-state thermal condition according to the equation of thermal conductivity for a flat plate.

EFFECT: improving accuracy of measurement of thermal conductivity coefficient.

3 dwg

FIELD: testing equipment.

SUBSTANCE: invention is used for testing of aircraft (AC) thermal protection to determine its thermal properties and serviceability. The proposed device comprises a heat vacuum chamber with a metering module placed in it, in which there is a high-temperature heater installed, being located between two tested fragments of thermal protection, behind which there are two calorimeters with thermocouples and security heat insulation, and an automated heating and measurement control system. Calorimeters are installed relative to tested fragments of thermal protection with a gap, and heat control coatings are applied onto opposite surfaces of the fragment and the calorimeter. Calorimeters are divided into sections. The automatic system is equipped with a block for control of gas pressure in the heat vacuum chamber and in the metering module.

EFFECT: higher accuracy of test results due to approximation of AC thermal protection testing conditions to conditions on location.

1 dwg

FIELD: physics.

SUBSTANCE: analysed flat sample of known thickness is brought into thermal contact with a flat reference sample on the plane through a heat source with a given thermal flux density. Outer planes of the analysed sample and reference sample having heat-insulated side surfaces are temperature-controlled at a given temperature and temperature in the contact plane is measured. The reference sample is made from two identical stacks comprising flat plates stacked in parallel to the plane of thermal contact, the thickness of said plates being defined by pressure tolerated by the analysed sample. One of the stacks is first installed in place of the analysed sample. The average thermal resistance of both stacks is determined and its double value is used when determining heat conductivity of the analysed sample.

EFFECT: temperature flexural deformation of the reference sample is compensated for by mechanical pressure tolerated by the analysed sample.

1 dwg

FIELD: physics.

SUBSTANCE: two temperature sensors, made in form of thermocouples or resistance thermometers, are placed in a prepared flat sample of the analysed material in sections with coordinates x=x1 and x=x2. The sample, whose top is heat insulated, is placed on the surface of a Peltier element which is a source of harmonic temperature oscillations. By varying the period τ0 of the harmonic oscillations of the Peltier element, an operating mode of the measuring devices is selected, at which the value differs by not more than a small value ε=0.002…0.009 from a given value ψv from the range (0.14…0.18), which enables to calculate the unknown value of thermal diffusivity with the least error.

EFFECT: high accuracy of measuring thermal diffusivity of heat-insulating materials.

2 dwg

FIELD: heating.

SUBSTANCE: device includes heat exchanger (1) being in heat contact with internal surface of investigated object (8), two contact temperature measuring devices (4, 5), heating (9), accumulating (11) and drain (12) tanks; inlet (2), outlet (3), connection (10), drain (13) and overflow (26) pipelines. External surface of heat exchanger, excluding the section adjacent to internal surface (7) of investigated object, is equipped with heat insulation (6). The first contact temperature measuring device (4) is arranged between internal surface (7) of investigated object (8) and external surface of heat exchanger (1). The second contact temperature measuring device (5) is arranged on external (22) or side (23) surfaces of investigated object (8). Heat exchanger (1) is connected through connection pipeline (10) to heating tank (9) and through outlet pipeline (3) to drain tank (12). Heating tank (9) is connected through inlet pipeline (2) to accumulating tank (11), and through drain pipeline (13) to drain tank (12). Accumulating tank (11) is connected through overflow pipeline (26) to drain tank (12). Connection (10), inlet (2) and drain (13) pipelines are equipped with valves (14, 16, 18) and heat carrier flow rate measuring devices (15, 17, 19). In order to carry out measurements, heat carrier is passed by the heat exchanger. When heat carrier reaches the operating temperature, a section of the internal surface of the investigated object is heated with heat exchanger. Temperature of heated section of internal surface of the investigated object is measured. Time interval is measured between the beginning of internal surface section heating and the beginning of temperature increase at the specified point on external (or side) surface of the investigated object. Relationship between the overheating value of external (or side) surface of the investigated object and time is recorded. Relationship between duration of the first heating stage and overheating value of external (or side) surface of the investigated object is obtained. Values of heat transfer specific resistance through the object is calculated for various time moments. Constant value of heat transfer specific resistance through the object is defined or its average value is calculated.

EFFECT: improving consumer properties due to enlarging application field and improving measurement accuracy.

10 cl, 4 dwg

FIELD: heating.

SUBSTANCE: device includes heat exchanger (1), two contact temperature measuring devices (4, 5), heating (9), accumulating (11) and drain (12) tanks; inlet (2), outlet (3), connection (10), drain (19) and return (22) pipelines. Heat exchanger (1) has the possibility of spatial movement relative to the investigated object (8). External surface of heat exchanger (1), excluding the section facing internal surface (7) of investigated object (8), is equipped with heat insulation (6). The first contact temperature measuring device (4) is arranged on external surface of heat exchanger (1), which faces internal surface (7) of investigated object (8). The second contact temperature measuring device (5) is arranged on external (17) or side (18) surfaces of investigated object (8). Heat exchanger (1) is connected through connection pipeline (10) to heating tank (9), and through outlet pipeline (3) to drain tank (12). Heating tank (9) is connected through inlet pipeline (2) to accumulating tank (11). Accumulating tank (11) is connected through drain (19) and return (22) pipelines to drain tank (12). Connection pipeline (10) is equipped with heat carrier flow rate measuring device (13) and valve (14). Return pipeline (22) is equipped with valve (24) and pump (23). Before heat carrier reaches the operating temperature, heat exchanger is located at some distance from internal surface of the investigated object, which excludes heat contact between them. When heat carrier reaches the operating temperature, heat contact is provided between the heat exchanger and internal surface of the investigated object. Temperature of heated section of internal surface of the investigated object is measured. Time interval is measured between the beginning of internal surface section heating and the beginning of temperature increase at the specified point on external (or side) surface of the investigated object. Relationship between the overheating value of external (or side) surface of the investigated object and time is recorded. Relationship between duration of the first heating stage and overheating value of external (or side) surface of the investigated object is obtained. Values of heat transfer specific resistance through the investigated object are calculated for various time moments. Constant value of heat transfer specific resistance through the investigated object is defined or its average value is calculated.

EFFECT: improving consumer properties due to enlarging application field and improving measurement accuracy.

10 cl, 4 dwg

FIELD: physics.

SUBSTANCE: method of determining thermal conductivity coefficient of super-thin liquid heat-insulating coatings involves use of a multilayer plane-parallel wall consisting of two layers of material mounted on a heat source, measuring temperature of the heat source tT, temperature between two layers of the material t and temperature of the outer surface tN, and determining λu using a calculation formula. Temperature of the non-insulated outer surface of the top layer tN is calculated as a difference between double the temperature between layers of the material and the temperature of the heat source using the equation: tN=2t-tT. A thin metal plate on which there is a super-thin liquid heat-insulating coating is then placed on the outer surface of the top layer. Temperature in the contact surface of the top layer of the material and the metal plate with the heat insulation tu is measured and the thermal conductivity coefficient of the super-thin liquid heat-insulating coating λu is determined using the formula: where: λu is the thermal conductivity coefficient of the super-thin heat-insulating coating, δu is the thickness of the super-thin heat-insulating coating, δ is the thickness of the layer of the material, λ is the thermal conductivity coefficient of the material, tN is the temperature of the non-insulated outer surface of the top layer, tu is the temperature in the contact surface of the top layer of the material and the metal plate with heat insulation. The method enables to measure λu in the range from 0.01 to 0.009 W/m°C.

EFFECT: method is simple and affordable.

1 cl, 1 dwg

FIELD: physics.

SUBSTANCE: device for measuring heat-transfer resistance of a building structure has a heater and a first thermometer mounted on one side of the building structure, a cooler and a second thermometer mounted on the opposite side of the building structure, and device for measuring heat flow through the building structure. The device is further provided with a heat-insulated detachable chamber which houses the heater, the heat flow metre and the first thermometer. The cooler and the second thermometer are built into a box which is provided with elements for mounting to the building structure.

EFFECT: high accuracy of measuring heat-transfer resistance of a building structure.

3 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: standard electric logging of a well is carried out in low-temperature rocks, the area of possible bedding of gas hydrates and hydrate formation is identified in them. In the identified area of low-temperature rocks, on the basis of data of standard electric logging, zones are registered, in which measured values of the apparent electric resistance of low-temperature rocks are equal to at least 15 Ohm.m. Coolant is pumped in the investigated rock interval, afterwards thermometry is realised using highly sensitive thermometers, providing for error of temperature measurements of not more than 0.01°C, and zones are sought for, rock temperature in which, relative to the lowest registered temperature in the identified zone is at least by 0.2-0.5°C lower than the temperature of rocks adjacent to the borders of the detected zones. At the same time the latter zones are considered as zones containing gas hydrates. The area of possible bedding and hydrate formation is the area of rock bedding characterised by availability of thermobaric conditions for gas hydrates existence in rocks.

EFFECT: its higher efficiency by detection of gas hydrate rocks bedded in low-temperature rocks below a foot of permafrost rocks.

3 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes delivery of a shank with a set of packers and unions, downhole geophysical multi-purpose device to the hole end at a logging cable. Pumping into the well of a fluid containing thermal- and neutron-contrasting agents and periodical measurements. Contrasting fluid is pumped by several portions with volumes not less than interior volume of the horizontal borehole by means of subsequent switching into operation of different boreholes intervals covered by packers, by means of opening and closure control of outlet connections. Oil is used as a contrasting fluid instead of water. Movement of the contrasting fluid through the borehole is monitored by gamma-ray modules, resistivity meter or thermoconductive flowmeter.

EFFECT: improving accuracy for determination of operating intervals and sources of flooding under conditions of horizontal wells operation.

5 cl, 6 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes acquisition of log data on depth and time for a well drilling by means of a well string; log data on depth and time including data related to factors of torsional and axial loads and data related to hydraulic factor; and determination of a drill string neutral point at the moment of drilling based on factors of torsional and axial loads and hydraulic factor.

EFFECT: determination of a drill string neutral point during well drilling.

20 cl, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes simulating of formation and recording of data on borehole processes by a geophysical instrument run-in into the tubing string at a logging cable and self-contained instruments installed at the lower end of the tubing string. At that simulation of formation is made by breaking a breakable drain valve made of a brittle material of hemisphere shape and installed with a convex part downwards in the lower part of the tubing string; for this purpose a drill stem is fixed under the geophysical instrument and the geophysical instrument is run-in with the stem into the interval with speed sufficient to break the breakable drain valve. At that upper part of the tubing sting above the breakable drain valve is not filled with water and a packer is installed in tubular annulus at the level of the tubing string lower part.

EFFECT: increase of information content and reliability for borehole investigations; reduction of labour intensity, time consumption and equipment costs; possibility to use in wells with any producibility of the investigated formation.

1 dwg

FIELD: physics.

SUBSTANCE: electrodes are separately exposed to the impact of periodically accumulated potential energy of a spring, which is generated by rotating screw pairs and abrupt (impact) release of energy when screw interaction of crests of the screw pairs ceases. The apparatus for realising the method is a drive structure having an output shaft which actuates the screw pairs. During forward rotation, the screw pairs open centralisers and elastically press the electric leads to the wall of the well casing, apply periodic action on the electrodes that are rigidly connected to the electric leads. The electric leads are cut into the wall of the well casing. Impact action occurs when screw interaction between the screw and nut, which is pressed by a power spring, ceases.

EFFECT: improved electrical contact between electric leads and a casing column.

10 cl, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves drilling of production and injection wells, pumping of displacement agent through injection wells and extraction of the product through production wells, drilling of additional wells, and development of residual oil-saturated intervals. According to the invention, in all newly drilled additional wells there determined are residual oil-saturated and flooded intervals prior to the well casing. For that purpose, one-stage determination of temperature field is performed throughout the length of the well in real time both at filling of the shaft with heated washing liquid or water and after it is filled using an optic-fibre system. In case of absorption of washing liquid or water, volume of their supply, which provides full filling of the well, is increased. After the well casing residual oil-saturated and/or water-saturated intervals are developed, and displacement agent is extracted and/or pumped.

EFFECT: increasing oil recovery owing to improving the accuracy of determination of intervals of arrangement of water-saturated and residual oil-saturated zones.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: electric motor of a submersible pump can be equipped with two rotary shafts, and namely an upper one that is more rotary and a lower one that is less rotary, which are controlled with one common or two different individual current supply cables and connected to the submersible pump and a shutoff element. Lower electric motor is provided with the less rotary shaft controlled with a common or an individual current supply cable. The shutoff element consists of an upper rotating bar and a lower movable bar, which are connected to each other by means of screw thread. The rotating bar is connected from above with the less rotary shaft through a spline square or a hexagon and installed in the housing with possibility of being rotated only on the axis to one and another sides. The movable bar is connected from below between two pass assemblies in the form of mounting seats or seats with a shutter installed in the housing with possibility of being moved only along the axis till tight closing of above and below located mounting seats to assure the possibility of both the control and cutout of the fluid flow of the corresponding formation.

EFFECT: improving reliability and efficiency of the plant.

2 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: system includes control centre of electric-centrifugal pump to power transformer is connected and output of the transformer is connected by power circuits of submersible cable through input lead with submersible electric motor. In downhole part control unit is connected to power supply source by one input and to the first input/output of the amplifier by the other input/output. The second input/output of the amplifier together with input of power supply source is connected through a pressure-seal connector to independent signal circuit formed by transit insulated conductor laid between stator pack and housing of submersible electric motor connected at the other end through input lead with signal core of submersible cable. In surface part this core is connected to output of remote power supply and to the first input/output of transceiver which second input/output is connected to the first input/output of surface control unit and its second input/output is connected to input/output of the control centre of electric-centrifugal pump. The third output is connected to input of remote power source. The amplifier in downhole part and transceiver in surface part are designed to ensure half-duplex operation during data exchange as bidirectional network. Input lead assembly of submersible electric motor is made according to four-contact circuit. In the downhole part independent signal circuit can be prolonged for the purpose of connection to other equipment placed downstream of submersible centrifugal pump by means of this circuit transit through the downhole part of the system in order to arrange measurement and control of actuating mechanisms placed in other areas of the well space. The downhole control unit contains analogue and discreet measuring channels connected to the processor. Outputs of analogue pressure and temperature transducers and test signal shaper are connected to respective inputs of analogue multiplexor which output is connected to input of analogue-to-digital converter. Its second input/output is connected to the first input/output of the processor and the second input/output of the processor is connected to control input of multiplexor. Discreet measuring inputs are connected to vibration sensor and the third input/output is connected to the first input/output of the amplifier. Number of measured parameters is increased due to additional measuring channels and modification of the processor application software.

EFFECT: improvement of the device operational reliability and simplification of the device.

6 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: bore core is selected and examined, induction logging and induced gamma-ray logging or neutron-neutron logging is made and log curves are analysed for the roof of production tier. At that formations with apparent resistivity are identified with values less than 6-8 Ohm/m during induction logging and against values at curves of induced gamma-ray logging or neutron-neutron logging making less 85% and less than values of lower formations. Among these formations it is necessary to select strata without loamy lintels and strata of carbonate oil-filled formations and values of apparent resistivity not less than 15 Ohm/m against data of induction logging. Then sedimentary types for the selected formations is defined and if oil-saturated sandstone is present then conclusion is made about terrigenous origin of these formations. Then values are specified for porosity coefficient, permeability and oil-saturation coefficients and when lower limits for this region are exceeded the indentified formations will be referred to productive formations.

EFFECT: increase of operational efficiency during installation of the bottom-hole complex, improvement of level of detail and authenticity of GIS data for identification of geological rating for rock masses.

1 tbl

FIELD: oil and gas industry.

SUBSTANCE: down-hole testing and measuring complex includes earth control station with telemetric data system connected by a logging cable with submerged-type electric pump at the end of tubing string, system of measuring modules including sensors for recording of parameters (yield, pressure, temperature, moisture content) and driving machine for their delivery to horizontal section of a well connected by a logging cable that provides rigid mounting for the system of measuring modules and transfer of data to the control station. Logging cables of the system of measuring modules telemetric system unit are connected by cable connectors. Driving machine contains two walking modules connected electrically and further driven by electrical micro-drives and sequential movement of wedged supports. Installation of the down-hole testing and measuring complex is performed in two stages. At first system of measuring modules is lowered to a well by means of winch with survey cable connected by a cable connector with a logging cable of the system of measuring modules passing through a groove in the wall of an installation pipe mounted at the well surface at the end of tubing string and by the other butt end - to the deadman in which tube there is a movable logging cable. The system of measuring modules is lowered at first up to driving machine turning to a relatively horizontal section, then by means of the driving machine it is hold to the relatively horizontal section until cable connector seats in the deadman tube; the latter is lowered by means of the installation pipe to the preset depth and fixed on the well bore. Thereafter power supply is switched odd in the micro-drive, by means of the winch socket with the survey cable is disconnected from connector pin and the installation pipe is lifted to the surface. At the second stage submerged-type electric pump is lowered to the well with logging cable and socket of cable connector contact pair filled by liquid sealant which is by means of a centring skid connected to the logging cable for the system of measuring modules.

EFFECT: increase of operational efficiency during installation of the bottom-hole complex.

6 cl, 5 dwg

FIELD: mining industry.

SUBSTANCE: invention can be used in case of gas-lift operation of wells equipped by free piston-type installations. Invention envisages stopping well, connecting tube space and annular space in wellhead, recording bottom zone and wellhead pressures in tube and annular spaces, and computing well operation parameters using inflow curve plotted according to differences of bottom zone and wellhead pressures. Volume of produced fluid is found from potential output of formation and from condition of output of free piston. When comparing these volumes, parameters of well are computed in the base of minimum volume value.

EFFECT: optimized well operation.

2 dwg

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