Method for determining oil and gas productiveness of cracked argillaceous collectors in three-dimensional inter-well space

FIELD: oil and gas industry.

SUBSTANCE: method includes performing three-dimensional seismic operations, drilling wells with taking of core, electrical, radioactive, acoustic and seismic logging, testing of wells. Seismic operations are performed in three-dimensional inter-well space by longitudinal waves on basis of common deep point method. According to data from drilling and geophysical well research standard model seismic and well spectral-temporal images of cracked argillaceous collectors are determined as well as their spectral-temporal attributes. According to data from three-dimensional seismic operations in zone of wells standard experimental seismic attributes are determined and their volumetric spectral seismic attributes on basis of use of spectral-temporal three-dimensional seismic data analysis in target recording interval and numeric estimation of its results. Following mutual correlation of values of coefficients of capacity differentiation and oil productiveness is performed on basis of data from drilling and geophysical wells research with standard model seismic, well spectral-temporal attributes and volumetric spectral-temporal seismic attributes according to three-dimensional seismic data. Optimal volumetric spectral seismic attributes are selected with greatest mutual correlation coefficients and regressive dependencies of optimal volumetric spectral seismic attributes are built, or of a complex attribute, with values of coefficients of capacity differentiation and oil-productiveness of cracked argillaceous collectors according to drilling data and geophysical well research. Along al routes of seismic temporal cube spectral-temporal analysis is performed and its numeric spectral-temporal parameterization on basis of optimal volumetric spectral seismic attributes, or a complex attribute, with construction of attributes cubes and following recalculation thereof according to regressive dependencies to cubes of coefficients for capacity differentiation and oil productiveness.

EFFECT: higher reliability, higher precision.

 

The invention relates to petroleum Geology and can be used to optimize the placement of exploration and production wells on the subject of research on complex data ground-based three-dimensional seismic survey 3D longitudinal waves by the method of common-depth-point (CDP), electrical, radioactive, acoustic, seismic, logging, study of the core and well test.

There is a method of geophysical prospecting to determine the productivity of the oil reservoir (Patent for invention №2098851).

However, it can only be applied for studying granular (porous reservoir without significant impact fractured component, since the water permeability and then nefteproductproect are determined on the basis of knowledge of the radius of the pore channels and the effective specific capacitance on the reference drilling data and GIS, and in the interwell space - according to the two-dimensional 2D seismic, not taking into account the spatial seismic demolition and not possessing the necessary detail, especially in complex environments and at the stage of drilling.

There is also known a method of geophysical prospecting to determine nefteproduktov fractured shale reservoirs in the interwell space (Patent for invention №2225020), selected as b is iziseko equivalent.

However, this method is characterized by fundamental flaws. It also provides for time-frequency spectral analysis (TFA) temporary seismic sections with obtaining the Swan speakers, energy spectra and the determination of the spectral-temporal parameters (SVP) on seismic 2D seismic profiles with subsequent recalculation of the SVP in the capacitive coefficients of differentiation (CUD) and nefteproduktov (Knpr) mapping the contours SVP, KED and Knpr, i.e. two-dimensional image values SVP, KED and Knpr on a horizontal plane. This loss of precision work happens at the final stage when performing contour and the interpolation of values between the profiles, due to lack of detailed seismic 2D, in addition, the reliability of seismic SVP substantiated, without the use of natural analogue - vertical (borehole) SVP distribution curves GIS (acoustic, radioactive, electrical).

Due to these shortcomings can be errors when predicting nefteproduktov fractured shale reservoirs in the interwell space and, as a consequence, optimal placement of wells, increased development costs of the object.

Technical task, which focused on the TES invention, is to increase the reliability and validity of the geological conditions of laying new exploration and production wells based on the definition of the main parameters - nefteproduktov fractured shale reservoirs in the three-dimensional inter-well space.

How to determine nefteproduktov fractured shale reservoirs in the three-dimensional interwell space includes three-dimensional seismic survey 3D longitudinal waves by the method of common-depth-point (CDP), drilling, electrical, radioactive, acoustic and seismic logging, well testing and research core.

According to the drilling and GIS judge available fractured shale reservoirs, their capacitive differentiation and nefteproduktov with the definition of CUD and Knpr.

KED is, unlike all known characteristics of the heterogeneity of the reservoir (Basiev BT, Baturin J.E., Weinberg AM and other “instructional guidelines for the calculation of oil recovery from the depths”, MNE, RD-39-0147035-214-86, M., 1986; Wendelstein BY, Koziar V.F., Yatsenko, and other “Methodological recommendations for determining volumetric parameters oil and gas geophysical research wells with the inclusion of the results of core analysis, sampling and testing of productive strata”, the Ledger is, Ministry of Geology, MPP, NTO Southfromjersey”, Kalinin, 1990), the ratio of total productive capacity fractured shale reservoirs to the total storage capacity of reservoirs, each of which has a capacity of 2 or more times greater than the average capacity of the target interval.

where n is the total number of layers, Knthe porosity coefficient, h is the thickness of the layer,

KED directly characterizes the structure of pore space fractured shale reservoirs, i.e. the relative number of long, flat horizontal inclusions, which may be oil (Fords LU, V.M. Kuznetsov, Ovcharenko A. “the Internal structure of clay collector according to geophysical research” SEG, EAGO, EAGE, St. Petersburg, 1995, vol; Kuznetsov V.M. “multi-wave polarization seismic applied to the study of fractured media”, M, Vniigenetika, 2001). The more KED, the more capacitive differentiation (contrast) fractured shale reservoirs and the possibility of formation of fracture zones in the form of a combination of a generally vertical microcracks with a single dominant direction and relatively long, flat horizontal inclusions that form oil reservoirs (Zubkov, M., Bondarenko, M. “Prediction of zones of secondary Tres is Novosti based on seismic data and tectonophysical modeling”, M, 1999).

According to acoustic, seismic, radioactive logging and laboratory core studies establish the stiffness model of the target interval of the geological section, calculate synthetic seismic trace which are SWAN determine the model of the seismic ITS nefteproduktov fractured clayey sediments. According to GIS spend SWAN and determine downhole ITS target of sediment Kopilevich E.A., Davydov E.A. and other “Method of typing and correlation neftegazoperspektivnyh rocks in borehole spectral-time parameters”. Patent for invention No. 2201606, 2003).

According to ground-based three-dimensional seismic CDP 3D in area wells determine ITS experimental nefteproduktov fractured shale reservoirs on the basis of the SWAN respective time interval of the seismic record.

Produce a quantitative evaluation of the model seismic, borehole and experimental seismic ITS use of work specific frequency and time power spectral densities of frequency and time spectra on the frequency and the time of their maximum, or average values of frequency and time, and the relationship of energy to high frequencies and large times to power the low frequencies and small times.

Thus, for a mod is selected seismic and well ITS turns out six spectral-temporal attributes (EAS), and for experimental seismic ITS six volumetric spectral seismic attributes (OSS). Of the six attributes three frequency (along the frequency axis) and three time (axis of time).

Model and borehole IAS, as well as experimental OSS must be identical with the cross-correlation coefficients CVR>of 0.75, which indicates a reasonable choice of NWO and the reliability of the OSS according to the 3D seismic. At the higher CVR choose the best for a specific geologic conditions, the most reliable OSS.

ITS seismic data 3D - temporal cube, i.e. the dependence of seismic amplitudes from the three coordinates x, y, t - A=f(x, y, t) is a four-dimensional dependence of seismic amplitudes from the coordinates x, y, f, t, or two cube dependencies A=f(x, f, t) and A=f(y, f, t), where f is a variable Central frequency spectra of seismic recording; t - axis is time; x, y spatial coordinates.

ITS characterized quantitatively using OSS for each of the two cubes, with six cubes of OSS, i.e. three-dimensional dependence of OSS from three coordinates - OCCA=f(x, y, t).

The OSS in the amount of six attributes are determined by the energy (frequency along the frequency axis f) and temporary (on-axis time - t) spectra of the three-dimensional results, the SWAN cubes NWO.

OSSA along the frequency axis:

where S(A2)(t) is the spectral density of the frequency power spectrum is proportional to the square of the amplitude of seismic records in the target time interval (Δt); fn- the initial (low) frequency spectrum at the level of 10% of its maximum; fto- the final (high) frequency spectrum at the level of 10% of its maximum;

Thus, the OSS1it is the ratio of the energy of the high frequencies to the energy of low frequency energy of the frequency spectrum.

where Δf=fto-fn;- weighted average frequency.

Thus, the OSS2this work unit power spectral density of the frequency spectrum by the average frequency.

where fmaxmaximum frequency energy of a frequency spectrum at the level of 30-70% of its maximum.

Thus, the OSS3this work unit power spectral density of the frequency spectrum at the maximum frequency with the level selection (30-70%) of its definition.

OSSA-axis times:

where S(A2)(f), tn, ttothat Δt, tcp,- the same pair of the parameters of the energy spectrum, only along the axis of time (t).

Values of OSS axis t are determined by the target shift time interval (Δt) on a constant selected value τ≥1-2 MS (sampling seismic record).

Thus, of the two cubes ITS possible to get a six cubes OCCA1-6in the coordinates x, y, t.

The optimal, most reliable experimental reference of OSS in the area of wells, or integrated OSS representing convolution optimal OSS by famous modern algorithms cokriging or artificial neural networks, correlated with KED and nefteproductproect (Knpr) fractured shale reservoirs by drilling data and GIS building regression dependencies of OSSopt=f(CUD) and KED=f(Cnpr).

When values of CVR≥0.75 in Cuba optimal or comprehensive OSS translated into cubes KED and Knpr fractured shale reservoirs in the coordinates x, y, t.

Thus, this proposal allows to determine nefteproductproect fractured shale reservoirs at any point in the three-dimensional inter-well space.

This provides a sharp decline in the cost of subsequent drilling exploration and production wells.

How to determine nefteproduktov fractured shale reservoirs in the three-dimensional inter-well space, including with ismerosodnek works drilling with coring, electrical, radioactive, acoustic, seismic, logging, well testing, and judgment on the obtained information about the presence of fractured shale reservoirs, their capacitive differentiation and nefteproduktov, characterized in that the seismic work is carried out in a three-dimensional interwell space longitudinal waves by the method of common depth point, according to the drilling and geophysical surveys of the wells define a reference model of seismic and borehole spectral-temporal images of fractured shale reservoirs and their spectral-temporal attributes, and according to the three-dimensional 3D seismic in the area of wells to determine the reference experimental spectral-temporal images and volumetric spectral seismic attributes based on the application of spectral-temporal analysis of 3D seismic data in the target recording interval and quantitative evaluation of its results, representing the ratio of the energy spectra of high frequencies and large times to the energy spectra of low frequency and small times, and also product specific frequency spectral energy densities of the frequency spectrum by the average and maximum frequency, and the product of a specific time of the spectral energy densities of the temporary with ectra on average and maximum times with the subsequent cross-correlation values of the coefficients capacitive differentiation and nefteproduktov according to drilling and geophysical surveys of the wells with the reference model seismic, borehole spectral-temporal attributes and three-dimensional spectral seismic attributes on 3D seismic data; the choice of the optimal volumetric spectral seismic attributes with the highest cross-correlation coefficients and building regression dependencies optimal volumetric spectral seismic attributes, or complex attribute, with values of coefficients capacitive differentiation and nefteproduktov fractured shale reservoirs by drilling data and well logging; then all the routes temporary seismic cube spend the time-frequency analysis and its quantitative spectral-temporal parameterization for optimal volumetric spectral seismic attributes or complex attribute, build cubes attributes and their subsequent conversion by the regression dependencies in Cuba coefficients capacitive differentiation and nefteproduktov, i.e. the definition of nefteproduktov fractured shale reservoirs at any point in the three-dimensional inter-well space.



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: method includes performing three-dimensional seismic operations, drilling wells with extracting of core, electric, radioactive, acoustic and seismic logging, testing of wells. According to data from drilling and geophysical well research type of geological cross-section of target oil-gas productive deposits is determined. According to data from acoustic, seismic and radioactive logging, laboratory research of core, rigidity models of target deposits are set, synthetic seismic routes are calculated, which are used to perform spectral-temporal analysis and standard model seismic spectral-temporal images of oil-gas deposits are also determined. On basis of data of geophysical wells research - acoustic, electric, radioactive logging - well (vertical) standard spectral-temporal images of target range are determined by spectral-temporal analysis of well geophysical research curves. According to three-dimensional seismic operations data in well zone standard experimental spectral-temporal images are determined for oil-gas productive and other types of geological cross-section on basis of use of spectral-temporal analysis of seismic operations data in target recording range. Numeric estimation of model, well and experimental spectral-temporal images is performed. Model, well and spectral-temporal attributes and experimental volumetric spectral seismic attributes should correlate mutually with mutual correlation coefficient more than 0.75. Greatest mutual correlation coefficients are used to select optimal volumetric spectral seismic attributes. Along all routes of seismic temporal cube in target range of recording spectral-temporal analysis is performed and its numeric spectral-energetic parameterization by frequency and time with construction of cubes for optimal volumetric spectral seismic attributes or complex volumetric spectral seismic attribute. Results are compared to standard optimal volumetric seismic spectral attributes and different types of geological cross-section are determined numerically in any point of three-dimensional inter-well space with detection of position of oil-gas productive types of geological cross-section.

EFFECT: higher reliability, higher precision.

FIELD: oil and gas industry.

SUBSTANCE: method includes performing three-dimensional seismic-prospecting operations, drilling wells with taking of core, electric, radioactive, acoustic and seismic logging, testing of wells. In inter-well space seismic-prospecting operations are performed in longitudinal waves according to deep point method. On basis of drilling and geophysical research data standard modeling seismic and well spectral-time samples of oil-productive cracked carbonate collectors and their spectral-time attributes are determined. On basis of three-dimensional seismic prospecting data in area of wells, standard experimental spectral-time images of oil-productive cracked carbonate collectors are determined as well as their volumetric spectral seismic attributes on basis of use of spectral-time analysis of three-dimensional seismic prospecting data in goal recording range and numeric estimation of its results. Mutual correlation of specific integral capacity of cracked carbonate collectors, hydraulic conductivity and oil productiveness is performed on basis of drilling data and geophysical researches of wells with standard modeling seismic, well spectral-time and volumetric spectral seismic attributes in zone of well. Optimal volumetric spectral seismic attributes are selected with greatest value of mutual correlation coefficients. Regression dependencies of optimal standard volumetric spectral seismic attributes are built, or complex attribute, with depth-specific integral capacity of cracked carbonate collectors, their hydraulic conductivity and oil productiveness on basis of drilling and geophysical well research data are built. Along all tracks of seismic time cube in goal range of recording spectral-time analysis is performed and its numeric spectral-time parameterization on basis of optimal volumetric spectral seismic attributes and their following recalculation on basis of set regression dependencies to cubes of integral depth-specific capacity, hydraulic conductivity and oil productiveness is performed as well.

EFFECT: higher reliability, higher precision, higher efficiency.

FIELD: oil and gas industry.

SUBSTANCE: method includes performing three-dimensional seismic prospecting operations, drilling wells with taking of core, electric, radioactive, acoustic and seismic logging, testing of wells. In inter-well space seismic prospecting operations are performed by three-dimensional longitudinal waves according to deep point method. On basis of drilling data and geophysical well research standard modeling seismic and well spectral-time images of oil-productive deposits and their spectral-time attributes are determined. On basis of data of surface three-dimensional seismic prospecting in area of wells standard experimental spectral-time images and their volumetric spectral seismic attributes are determined on basis of use of spectral-time analysis of seismic prospecting data in goal range of recording and numeric estimation of its results. Following mutual correlation of values of hydraulic conductivity and coefficients of oil productiveness is performed on basis of drilling geophysical well research data with standard modeling seismic, well time-spectral attributes and volumetric spectral time attributes on basis of seismic prospecting data. Optimal volumetric spectral seismic attribute is selected with greatest mutual correlation coefficient. Regression dependencies of optimal spectral seismic attribute are built, or same for complex attribute, with value s of hydraulic conductivity and oil-productiveness coefficient of porous collectors according to drilling and geophysical well research data. Along all tracks of seismic time cube spectral-time analysis is performed and its numeric spectral-time parameterization on basis of optimal volumetric spectral seismic attribute, or complex attribute, with construction of attribute cube and its following recalculation according to regression dependencies to hydraulic conductivity cubes and oil productiveness cubes.

EFFECT: higher reliability, higher precision.

FIELD: oil and gas industry.

SUBSTANCE: method includes performing three-dimensional seismic prospecting operations, drilling wells with taking of core, electric, radioactive, acoustic and seismic logging, testing of wells. On basis of drilling data and geophysical well research standard modeling seismic and well spectral-time images of oil-productive deposits and their spectral-time attributes are determined. On basis of data of surface three-dimensional seismic prospecting in area of wells standard experimental spectral-time images of oil and gas productive porous collectors and their volumetric spectral seismic attributes are determined on basis of use of spectral-time analysis of seismic prospecting data in goal range of recording and numeric estimation of its results. Following mutual correlation of values of hydraulic conductivity and capacity is performed on basis of drilling geophysical well research data with standard modeling seismic, well time-spectral attributes and volumetric spectral time attributes on basis of seismic prospecting data from area of wells. Optimal volumetric spectral seismic attributes are selected with greatest mutual correlation coefficients. Regression dependencies of optimal spectral seismic attribute are built, or same for complex attribute, with values of hydraulic conductivity and oil and gas productive porous collectors capacity according to drilling and geophysical well research data. Along all tracks of seismic time cube spectral-time analysis is performed and its numeric spectral-time parameterization on basis of optimal volumetric spectral seismic attribute, or complex attribute, with construction of attribute cubes and their following recalculation according to regression dependencies to hydraulic conductivity cubes and capacity cubes.

EFFECT: higher reliability, higher precision.

The invention relates to the field of study wells and can be used to quickly identify hidden sources of groundwater contamination in the oil industry

The invention relates to Geophysics, seismic methods for mineral exploration using explosive charges placed in boreholes (wells) in the area of low velocities, and is intended to generate seismic sections, high resolution and accuracy in difficult environments, in particular when a large zone of low velocities (more than 20-25 m)

The invention relates to physico-technical process of avoiding dangerous manifestations of volcanic activity

The invention relates to petroleum Geology and can be used to optimize the placement of exploration and production wells on the examined object on the complex data of the ground seismic, electrical, radioactive, acoustic, seismic, logging, study of the core and well test

FIELD: oil and gas industry.

SUBSTANCE: method includes performing three-dimensional seismic prospecting operations, drilling wells with taking of core, electric, radioactive, acoustic and seismic logging, testing of wells. On basis of drilling data and geophysical well research standard modeling seismic and well spectral-time images of oil-productive deposits and their spectral-time attributes are determined. On basis of data of surface three-dimensional seismic prospecting in area of wells standard experimental spectral-time images of oil and gas productive porous collectors and their volumetric spectral seismic attributes are determined on basis of use of spectral-time analysis of seismic prospecting data in goal range of recording and numeric estimation of its results. Following mutual correlation of values of hydraulic conductivity and capacity is performed on basis of drilling geophysical well research data with standard modeling seismic, well time-spectral attributes and volumetric spectral time attributes on basis of seismic prospecting data from area of wells. Optimal volumetric spectral seismic attributes are selected with greatest mutual correlation coefficients. Regression dependencies of optimal spectral seismic attribute are built, or same for complex attribute, with values of hydraulic conductivity and oil and gas productive porous collectors capacity according to drilling and geophysical well research data. Along all tracks of seismic time cube spectral-time analysis is performed and its numeric spectral-time parameterization on basis of optimal volumetric spectral seismic attribute, or complex attribute, with construction of attribute cubes and their following recalculation according to regression dependencies to hydraulic conductivity cubes and capacity cubes.

EFFECT: higher reliability, higher precision.

FIELD: oil and gas industry.

SUBSTANCE: method includes performing three-dimensional seismic prospecting operations, drilling wells with taking of core, electric, radioactive, acoustic and seismic logging, testing of wells. In inter-well space seismic prospecting operations are performed by three-dimensional longitudinal waves according to deep point method. On basis of drilling data and geophysical well research standard modeling seismic and well spectral-time images of oil-productive deposits and their spectral-time attributes are determined. On basis of data of surface three-dimensional seismic prospecting in area of wells standard experimental spectral-time images and their volumetric spectral seismic attributes are determined on basis of use of spectral-time analysis of seismic prospecting data in goal range of recording and numeric estimation of its results. Following mutual correlation of values of hydraulic conductivity and coefficients of oil productiveness is performed on basis of drilling geophysical well research data with standard modeling seismic, well time-spectral attributes and volumetric spectral time attributes on basis of seismic prospecting data. Optimal volumetric spectral seismic attribute is selected with greatest mutual correlation coefficient. Regression dependencies of optimal spectral seismic attribute are built, or same for complex attribute, with value s of hydraulic conductivity and oil-productiveness coefficient of porous collectors according to drilling and geophysical well research data. Along all tracks of seismic time cube spectral-time analysis is performed and its numeric spectral-time parameterization on basis of optimal volumetric spectral seismic attribute, or complex attribute, with construction of attribute cube and its following recalculation according to regression dependencies to hydraulic conductivity cubes and oil productiveness cubes.

EFFECT: higher reliability, higher precision.

FIELD: oil and gas industry.

SUBSTANCE: method includes performing three-dimensional seismic-prospecting operations, drilling wells with taking of core, electric, radioactive, acoustic and seismic logging, testing of wells. In inter-well space seismic-prospecting operations are performed in longitudinal waves according to deep point method. On basis of drilling and geophysical research data standard modeling seismic and well spectral-time samples of oil-productive cracked carbonate collectors and their spectral-time attributes are determined. On basis of three-dimensional seismic prospecting data in area of wells, standard experimental spectral-time images of oil-productive cracked carbonate collectors are determined as well as their volumetric spectral seismic attributes on basis of use of spectral-time analysis of three-dimensional seismic prospecting data in goal recording range and numeric estimation of its results. Mutual correlation of specific integral capacity of cracked carbonate collectors, hydraulic conductivity and oil productiveness is performed on basis of drilling data and geophysical researches of wells with standard modeling seismic, well spectral-time and volumetric spectral seismic attributes in zone of well. Optimal volumetric spectral seismic attributes are selected with greatest value of mutual correlation coefficients. Regression dependencies of optimal standard volumetric spectral seismic attributes are built, or complex attribute, with depth-specific integral capacity of cracked carbonate collectors, their hydraulic conductivity and oil productiveness on basis of drilling and geophysical well research data are built. Along all tracks of seismic time cube in goal range of recording spectral-time analysis is performed and its numeric spectral-time parameterization on basis of optimal volumetric spectral seismic attributes and their following recalculation on basis of set regression dependencies to cubes of integral depth-specific capacity, hydraulic conductivity and oil productiveness is performed as well.

EFFECT: higher reliability, higher precision, higher efficiency.

FIELD: oil and gas industry.

SUBSTANCE: method includes performing three-dimensional seismic operations, drilling wells with extracting of core, electric, radioactive, acoustic and seismic logging, testing of wells. According to data from drilling and geophysical well research type of geological cross-section of target oil-gas productive deposits is determined. According to data from acoustic, seismic and radioactive logging, laboratory research of core, rigidity models of target deposits are set, synthetic seismic routes are calculated, which are used to perform spectral-temporal analysis and standard model seismic spectral-temporal images of oil-gas deposits are also determined. On basis of data of geophysical wells research - acoustic, electric, radioactive logging - well (vertical) standard spectral-temporal images of target range are determined by spectral-temporal analysis of well geophysical research curves. According to three-dimensional seismic operations data in well zone standard experimental spectral-temporal images are determined for oil-gas productive and other types of geological cross-section on basis of use of spectral-temporal analysis of seismic operations data in target recording range. Numeric estimation of model, well and experimental spectral-temporal images is performed. Model, well and spectral-temporal attributes and experimental volumetric spectral seismic attributes should correlate mutually with mutual correlation coefficient more than 0.75. Greatest mutual correlation coefficients are used to select optimal volumetric spectral seismic attributes. Along all routes of seismic temporal cube in target range of recording spectral-temporal analysis is performed and its numeric spectral-energetic parameterization by frequency and time with construction of cubes for optimal volumetric spectral seismic attributes or complex volumetric spectral seismic attribute. Results are compared to standard optimal volumetric seismic spectral attributes and different types of geological cross-section are determined numerically in any point of three-dimensional inter-well space with detection of position of oil-gas productive types of geological cross-section.

EFFECT: higher reliability, higher precision.

FIELD: oil and gas industry.

SUBSTANCE: method includes performing three-dimensional seismic operations, drilling wells with taking of core, electrical, radioactive, acoustic and seismic logging, testing of wells. Seismic operations are performed in three-dimensional inter-well space by longitudinal waves on basis of common deep point method. According to data from drilling and geophysical well research standard model seismic and well spectral-temporal images of cracked argillaceous collectors are determined as well as their spectral-temporal attributes. According to data from three-dimensional seismic operations in zone of wells standard experimental seismic attributes are determined and their volumetric spectral seismic attributes on basis of use of spectral-temporal three-dimensional seismic data analysis in target recording interval and numeric estimation of its results. Following mutual correlation of values of coefficients of capacity differentiation and oil productiveness is performed on basis of data from drilling and geophysical wells research with standard model seismic, well spectral-temporal attributes and volumetric spectral-temporal seismic attributes according to three-dimensional seismic data. Optimal volumetric spectral seismic attributes are selected with greatest mutual correlation coefficients and regressive dependencies of optimal volumetric spectral seismic attributes are built, or of a complex attribute, with values of coefficients of capacity differentiation and oil-productiveness of cracked argillaceous collectors according to drilling data and geophysical well research. Along al routes of seismic temporal cube spectral-temporal analysis is performed and its numeric spectral-temporal parameterization on basis of optimal volumetric spectral seismic attributes, or a complex attribute, with construction of attributes cubes and following recalculation thereof according to regressive dependencies to cubes of coefficients for capacity differentiation and oil productiveness.

EFFECT: higher reliability, higher precision.

FIELD: oil and gas industry.

SUBSTANCE: method includes performing surface three-dimensional seismic operations using 3D longitudinal waves according to common-depth-point method, drilling wells with extraction of core, electric, radioactive, acoustic and seismic logging, testing of wells, research of core. On basis of total data from drilling and geophysical research of wells, and known criteria, presence of collectors, their capacity, penetrability, hydro-conductivity, oil productiveness, level of water-oil contact, position of oil fields, and also presence of correlative connection between capacity, hydro-conductivity and oil productiveness, are detected and/or estimated. According to data from acoustic, seismic and radioactive logging, and laboratory research of core, liquid models of target deposits are constructed, synthetic seismic trajectories are calculated, along which spectral-temporal analysis is performed and model seismic spectral-temporal and acoustic samples of oil-productive collectors are determined, which together form an oil bed. According to data from surface three-dimensional seismic 3D operations and results of common-depth-point method in area of wells experimental seismic spectral-temporal and pseudo-acoustic images of oil bed are determined. Acoustic and pseudo-acoustic images are estimated using bed-average acoustic and pseudo-acoustic speeds within target range of depths and times. Model seismic, well spectral-temporal analysis results and standard optimal specific results, acoustic and pseudo-acoustic speeds are correlated to capacity, hydro-conductivity, oil productiveness of collectors, regressive dependencies are set as well as mutual correlation coefficient. Along all trajectories of seismic temporal cube within target range of seismic record spectral-temporal analysis is performed and pseudo-acoustic conversions with determining of optimal specific results, pseudo-acoustic speeds and construction of cubes of spectral-speed attributes, which are recalculated to cubes of third powers of capacity, hydro-conductivity and oil productiveness of collectors.

EFFECT: higher reliability, higher precision, higher trustworthiness, higher efficiency.

FIELD: prospecting.

SUBSTANCE: method comprises exciting seismic vibration by means of a seismic source, generating simultaneously electric field by means of at least two electrodes, recording seismic vibration at least once when current is supplied to the electrodes and at least once when electric power is not supplied to them, producing the difference of seismic records obtained in the presence and absence of electric field, and detecting anomalous phenomena from the variation of the amplitude of reflected waves of seismic and seismic-electric fields.

EFFECT: enhanced precision and reduced cost of prospecting.

4 cl, 2 dwg

FIELD: oil geology, particularly to determine occurrence depths and relief structure of prospective geological horizons.

SUBSTANCE: method involves performing seismic exploration; drilling wells; determining reflection horizon seam depth on the base of drilling data; obtaining dependence of above seam depth as a function of relief altitude and determining interval velocity of upper non-uniform layer for following subsurface geologic imaging.

EFFECT: increased accuracy.

FIELD: geophysics.

SUBSTANCE: in accordance to method by transformation of excited and registered wave fields, amplitude-frequency and transfer characteristics of deposits of hydrocarbon resources are formed along lateral line and below face of control well, which are used to determine position and depth of oil-gas deposits. After transformation and comparison of frequency characteristics of longitudinal and transverse resilient oscillations, character of saturation and filtering-capacity properties of oil-gas deposits are determined.

EFFECT: higher efficiency, higher trustworthiness.

2 cl, 6 dwg

FIELD: geology, particularly to predict aerial extent and localization of metal, non-metal and fuel deposits of any genesis and age.

SUBSTANCE: method involves discovering geological structures and determining perspective zones for further deposit prospecting. In the case of ore deposit prediction above perspective zones are determined in low-order dome and composite type structures allied with crystal magma chambers and located over faults of different orders or in areas in which faults of one or several classes intersect. In the case of gravel deposit prediction the zones are determined in area located near ore deposits in neighboring low-order depression structures. In the case of oil and gas reservoir prediction the zones are prospected in all medium-order structures along radial, ring or oval fault areas and along super-deep ring or oval fault areas in zones in which crystal magma chambers are absent.

EFFECT: increased efficiency of aerial deposit extend and age prediction.

2 dwg

Up!