Geophysical reconnaissance method for detecting oil-gas productive types of geological cross-section in three-dimensional inter-well space

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.

 

The invention relates to petroleum Geology and can be used for optimization of inception of exploration and production wells on the subject of research on complex data ground-based three-dimensional 3D seismic survey, drilling and testing of wells, GIS, study of the core.

There is a method of geophysical prospecting to determine nefteproduktov types of geologic section, including drilling, electrical, radioactive, acoustic logging, well testing and research core, 2D seismic work, as well as subsequent processing of the received information for geological typing of the target interval of the section, including nefteproduktov deposits, receiving the reference model and the experimental spectral-temporal images (NWO) using spectral-temporal analysis (TFA) temporary seismic sections in the district of wells; spectral-energy parameterization of the energy spectra of the SWAN speakers in frequency and time with the definition of the six spectral-temporal parameters (SVP)representing the product of the specific spectral energy density spectra at their 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 small times, quantitative the ow characteristics of ITS different types of geological section by the values SVP, definition of SAP seismic profiles by mapping types of the geological section in the optimal contour SVP-specific geologic conditions, is selected as the closest analogue (Patent for invention №2183335).

The disadvantage of this method is to conduct ground-based seismic profiles, i.e. two-dimensional 2D seismic data which do not take into account possible spatial seismic demolition and are characterized by a lack of detail, especially in complex environments and during the operational phase of drilling oil and gas objects.

Accordingly, the SWAN is on temporary seismic sections with obtaining the SWAN speakers, energy spectra and SVP profiles with the following mapping types of the geological section in the contour SVP, i.e. two-dimensional image of the location of different types of geological section on a horizontal plane. This loss of precision work happens at the final stage, when conducting contour SVP and interpolation of values between SVP profiles due to lack of detailed seismic 2D.

Due to these shortcomings can be errors in determining the location of neftegazoperspektivnyh types obtained at the ski section, and as a consequence, optimal placement of wells and the increase in development costs of the object.

Technical problem on which this invention is directed, is to increase the reliability and accuracy of the study of geological conditions of laying new exploration and production wells by identifying neftegazoperspektivnyh types of the geological section in the three-dimensional inter-well space.

Method of geophysical prospecting to identify neftegazoperspektivnyh types of the geological section 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 spend typing geological section using a combination of traits - lithofacial and granulometric characteristics, peculiarities of development of lithogenesis, the thickness of the target interval, the effective thickness of the reservoir, porosity, capacity, permeability, hydroconductivity, well productivity, and spectral-temporal attributes (EAS) data GIW - curves GIS (Patent for invention №2201606).

But the main alicecullensawesome this typing is what types of geologic section, on the one hand, there is great variation in reservoir properties of the reservoir (permeability, water permeability, capacity), oil and gas productivity (flow rate, the ratio of productivity), and, on the other hand, the number of types of incision corresponds to the resolution of the mid-frequency seismic data, i.e. the number confidently distinguished by the NEA-GIS and three-dimensional spectral seismic attributes (OSS) ITS reference.

The difference between the types of geologic section should appear in the difference SVA-GIS and OSS-seismic (Δ)where- standard assessment of changes in IAS-GIS and OSS-seismic survey for each of the selected types of the geological section, including disjunctive, characterized by low-amplitude or bethamphetamine faults of great importance in the formation of natural oil and gas reservoirs.

According to acoustic, seismic, radioactive logging, laboratory core studies are stiffness model in wells for each type of the geological section, computed synthetic seismic trace which are the SWAN and define the reference model and ITS range is Ino-time attributes (EAS) for different types of geological section.

According to the GIS to determine downhole IAS target interval of the section.

According to the 3D seismic on the basis of the SWAN determine the reference experimental NWO and their OSS in the area of the reference wells, corresponding neftegazoperspektivnyh and other types of geologic section in the target time interval.

Model, borehole IAS and experimental OSS should be the same, with a correlation coefficient CVR≥to 0.75, indicating a reasonable definition of NWO and the OSS according to the 3D seismic.

ITS seismic data 3D - temporal cube, i.e. the dependence of seismic amplitudes (A) 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 - variable Central frequency spectra of seismic records,

t - axis (depth),

the x, y spatial coordinates.

ITS characterized quantitatively using OSS for each of the two cubes and the receipt of 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 the maximum

Thus, the OSS1is 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 OSS3is the product of the specific 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, tcf,

Values of OSS axis t are determined by the shift of the target interval (Δt) on a constant selected value.

Thus, two cubes of NWO are six cubes OCCA1-6in the coordinates x, y, t.

The combination of OSS in the area of wells quantify ITS reference neftegazoperspektivnyh, disjunctive with a low amplitude (bethamphetamine) tectonic disturbances and other types of geological section.

Of the six OSSA choose the best for a specific geologic conditions on the principle of maximum values of the difference of OSS for different types of geological section and the coefficients of cross-correlation model of seismic CBA and CBA-GIS.

Identifying neftegazoperspektivnyh types of geological incision is made by comparing the optimal values of OSS with reference to the relevant cubes OSS, or integrated OSS representing convolution optimal OSS by famous modern algorithms cokriging or artificial neural networks.

Thus, this proposal with high precision allows you to define integrated geological characteristics (type of structure) at any point in the three-dimensional inter-well space.

This provides rez the decline of the cost of subsequent drilling exploration and production wells.

Method of geophysical prospecting to identify neftegazoperspektivnyh types of geologic section, including land seismic surveys, drilling with coring, electrical, radioactive, acoustic and seismic logging, well testing, the study of the core and the judgment data available neftegazoperspektivnyh types of geologic section, characterized in that the inter-well space spend three-dimensional 3D seismic work on set of drilling data and spectral data analysis of geophysical research wells hold a reference typing section and defining a reference model of seismic and borehole spectral-temporal images, and the data and conducted ground-based three-dimensional 3D seismic in the area of wells to determine the reference experimental spectral-temporal images neftegazoperspektivnyh and other types of geological section based on the application of spectral-time analysis of seismic data in the target interval recording, produce a quantitative evaluation of the model seismic, borehole and experimental seismic spectral-temporal images, representing the product of the specific frequency spectral energy densities the practical frequency range on average and maximum rate that and the product of a specific time spectral densities temporary energy spectrum on the average and maximum time, and the ratio of the energy of high frequencies and large times to power the low frequencies and less time, with subsequent cross-correlation of the quantitative attributes and the choice of the optimal attribute with the highest cross-correlation coefficients, then all the routes temporary seismic cube spend the time-frequency analysis and its quantitative parameters in frequency and time, and the results in the form of cubes optimal volumetric spectral seismic attributes, or complex attribute, compare with the reference and quantitatively identify neftegazopromyslovye types of geologic section at any point in the three-dimensional interwell space.



 

Same patents:

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!