The method of placing wells on spectral-temporal features neftegazoperspektivnyh types of geologic section

 

(57) Abstract:

Use in petroleum Geology, in particular, for the optimal placement of new wells on the examined object on complex data land seismic exploration, well logging, seismic, logging, study of the core and test wells. Essence: conduct drilling with coring, electrical, radioactive, acoustic, seismic, well logging, well testing, research core, seismic CDP and judgment data neftegazoperspektivnyh, other types of geological section of the test object. The location of the identified types of incision identify on maps the contours of equal values of the spectral-temporal parameters, which is the product of a specific frequency and time power spectral densities of frequency and time spectra at the maximum frequency and time, or on a weighted average of frequency and time, as well as the ratio of the energy of high frequencies and large times to power the low frequencies and small times of seismic records. Well placed on the principle of maximum, efficient, productive volumes on the contour of the JV is preliminary interval, 0.5-section maps. Effect: increase the efficiency of exploration.

The invention relates to petroleum Geology and can be used for optimal placement of new wells on the examined object on complex data land seismic exploration, geophysical research wells (GIS), seismic logging, study of the core and well test.

There is a method of exploratory wells locations, including the selection of points laying on the ground even distribution of wells in area deposits, as well as drilling selection of wells and boreholes in areas with low concentrations of hydrocarbons. (See Gabrielian, A., Bryzinski A. M. guidelines for the conduct of work at the stage of prospecting and exploration of oil and gas fields. - M.: Nedra, 1982, S. 74.; Gabrielian, A., Karpushin C. H., Parascan Century. And. Methods of exploration for massive oil and gas deposits. - Proceedings VNIGNI, vol. 197, Nedra, 1978, S. 135).

The disadvantage of this method is unjustified increase in the number of wells drilled and excessive material costs.

There is also known a method of placement of the wells, including the identification of zones of equal productive, effective the year)

The disadvantage of this method is that it does not take into account the possible deviation of the capacitive properties of reservoirs in the interwell space from interpolation and extrapolation. This leads to drilling wells that do not contribute to the solution of the problem and, consequently, excessive unnecessary costs.

Closest to the claimed method is the placement of wells in the exploration of hydrocarbon deposits, including the identification of the zones of equal, effective, efficient volumes. (See Kopilevich E. A. Methodology and results of the oil-gas prospecting carbonate-based complex automated processing and interpretation of seismic data and drilling. - M.: VNIGNI, Vniigenetika, 1989, S. 205).

The disadvantage of this method is that by seismic data and existing drilling data to determine the specific, the effective capacity of the reservoir in the interwell space and subsequent exploration wells have not in the center of the established areas and in areas characterized by elevated values of this parameter.

In the proposed method all comprehensive geological and geophysical information is processed and interprets the LASS="ptx2">

The result of the processing and interpretation of the above geological and geophysical data is the determination of the spectral-temporal parameters neftegazoperspektivnyh and other types of geological section and the drawing up of the most informative of these cards on which the values SVP summarized in the form of isolines representing the most probable location neftegazoperspektivnyh and other types of geological section.

The location of new wells on the contour corresponding to the oil and gas-productive types of incision in the confidence interval, 0.5-section maps SVP. given the structural and other known factors, implements the principle of maximum effective, efficient volumes, as the contour lines correspond to the types of the geological section with maximum filtration-capacitive properties of the reservoir and productivity, defined according to drilling.

Thus, the problem is solved using a much more complete characterization of crosshole space, because the types of geologic section are determined not only by the capacity of collectors, but also by many other parameters. This allows to obtain more complete, nade efficiency of geological exploration for oil and gas.

The method includes drilling, electrical, radioactive, acoustic, seismic, well logging, well testing, study of core and surface seismic survey. Neftegazopromyslovye and other types of geological section integrally defined by drilling data: lithology and grain-size characteristics, peculiarities of development of lithogenesis, the thickness of the target interval, the effective thickness of the reservoir, porosity, capacity and permeability, spectral-temporal features of geophysical survey wells, hydroconductivity and productivity.

According to drilling, including SVP, obtained on the basis of spectral analysis (TFA) GIS data, determine neftegazopromyslovye and other types of geological section. Under the type section refers to the specific combination of lithofacies differences rocks in a stratigraphic range, characterized by exclusive history and formation conditions.

According to the land seismic CDP area wells define the reference spectral-temporal images (NWO) neftegazoperspektivnyh and other types of geological section, including calicotome (along the frequency axis) and time (on axis) spectra at the maximum or average frequency and time as well as the ratio of the energy of high frequencies and large times to power the low frequencies and less time.

On the basis of continuous SWAN of time sections based on seismic profiles define SVP target intervals seismic records in the interwell space corresponding neftegazoperspektivnyh sediments, and then, using the reference SVP, determine neftegazopromyslovye and other types of geologic section at any point of the studied object. The result is expressed in the mapping types of incision, i.e., in determining the most likely location neftegazoperspektivnyh and other types of geological section by the values SVP, generalized on the map in the form of contour lines, which greatly improves the reliability and accuracy of the study of geological conditions of laying new exploration and production wells by placing them on the contour SVP, relevant neftegazoperspektivnyh deposits.

Note that the location of new wells in the corresponding contour of SVP in the confidence interval, 0.5-section maps SVP, is determined by considering the structural and other known factors, which together provides an implementation of the principle of maximum efficiency

The method of placing wells on spectral-temporal features neftegazoperspektivnyh types of geologic section, including drilling with coring, electrical, radioactive, acoustic, seismic, well logging, well testing, research core, seismic surveying CDP and judgment data neftegazoperspektivnyh and other types of geological section of the investigated object and the location of the identified types of incision on the maps by contour lines of equal values of the spectral-temporal parameters, which is the product of a specific frequency and time power spectral densities of frequency and time spectra at the maximum frequency and time, or on a weighted average of frequency and time, as well as the ratio of the energy of high frequencies and large times to power the low frequencies and small times of seismic records corresponding to neftegazopromyslovogo interval section, seismic spectral-time parameters linked with the same spectral and temporal parameters of geophysical survey wells for neftegazoperspektivnyh and other types of geologic section, the different tkno-time parameters, relevant neftegazoperspektivnyh types of geologic section, in the confidence interval, 0.5-section maps.

 

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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

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