CN111812713A - Broken block trap determining method, exploration auxiliary method and device - Google Patents
Broken block trap determining method, exploration auxiliary method and device Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. analysis, for interpretation, for correction
- G01V1/30—Analysis
- G01V1/301—Analysis for determining seismic cross-sections or geostructures
- G01V1/302—Analysis for determining seismic cross-sections or geostructures in 3D data cubes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. analysis, for interpretation, for correction
- G01V1/282—Application of seismic models, synthetic seismograms
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/61—Analysis by combining or comparing a seismic data set with other data
- G01V2210/616—Data from specific type of measurement
- G01V2210/6169—Data from specific type of measurement using well-logging
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/64—Geostructures, e.g. in 3D data cubes
- G01V2210/641—Continuity of geobodies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/64—Geostructures, e.g. in 3D data cubes
- G01V2210/642—Faults
Abstract
According to the method and the device for determining the fault block trap, provided by the invention, on one hand, the fault block trap closed in butt joint can be accurately and quickly obtained by establishing a fault block oil reservoir geological model and combining a lithologic butt joint profile plate, and the fault block trap closed in butt joint belongs to class I traps, so that the seal is good; on the other hand, the method for quantitatively determining the trap sealing performance of the fault block by considering the trapping resource amount of the sealing capacity and the maximum hydrocarbon column height is provided, the main factor of the trapped oil-gas resource amount is accurately and objectively described, the method has the advantages of normative operation process, scientific and advanced evaluation method and comprehensive consideration factors, the reliability and the accuracy of the evaluation result of the fault block trapping are improved, the risk and the cost of exploration and development are greatly reduced, the exploration deployment and decision success rate is remarkably improved, and the method has good technical effect and application prospect.
Description
Technical Field
The invention relates to the technical field of exploration of oil fields, in particular to a method for determining fault block trapping, an exploration auxiliary method and an exploration auxiliary device.
Background
According to data statistics, in practice of exploration and production of the fault block oil and gas reservoirs, 61% of oil and gas exploration loss reasons are caused by fault block trap failure, so that how to accurately evaluate the fault block trap of the target area to be drilled and perform optimal queuing is important, and the reliability of the fault block trap is improved. The preferred primary task of evaluating the fault block trap for trap queuing is to determine whether the fault block trap fault is closed and the amount of resources that the trap can close. However, the evaluation factors of the fault block trapping are very complex, the closing or opening of the fault is influenced by a plurality of factors such as construction factors, reservoir factors, pressure, fracture surface lithology and the like, and the conventional fault block trapping evaluation method is basically used for qualitatively judging whether the fault is closed or not, starting from a single influence factor, obtaining the thickness and the oil-gas containing area of the fault block trapping reservoir on the basis of reservoir prediction and then calculating the trapping resource amount. However, for complex fault block oil and gas reservoirs, the problems of low qualitative speed, poor qualitative trap performance, difficult quantification of evaluation results, incomplete consideration factors and great deviation and one-sidedness of the evaluation results still exist, the improvement of fault block trap optimization queuing accuracy and the reliability of the results are severely restricted, and the exploration and production practice is difficult to effectively guide.
Disclosure of Invention
The invention at least provides a novel method for determining the broken block trap, which can determine the butt-joint closed trap with better sealing performance, has good sealing performance and belongs to class I traps.
The invention provides a method for determining a broken block trap, which comprises the following steps:
determining fault information and layer information in the region according to the post-stack seismic data of the region where the target fault is located;
generating a fault block oil reservoir geological model according to the fault information and the layer information;
and determining the fault block trap of the butt joint seal according to the fault block oil reservoir geological model and a preset lithologic butt joint profile plate.
In certain embodiments, the fault information includes fault properties, fault dip, fault offset; and/or the presence of a gas in the gas,
the horizon information comprises layering conditions, stratigraphic dip angles, stratigraphic thicknesses and stratigraphic depths of all the stratums.
In certain embodiments, the fault block reservoir geological model comprises a fault model and a fault block model; the generating of the fault block oil reservoir geological model according to the fault information and the layer information comprises the following steps:
carrying out three-dimensional construction modeling on the fault according to the fault information to obtain the fault model;
and carrying out three-dimensional structure modeling on the stratum according to the horizon information to obtain the horizon model.
In some embodiments, the method of fault block trap determination further comprises:
carrying out aboveground geological stratification according to the logging data to obtain aboveground geological stratification information;
and constraining and/or correcting the horizon model by utilizing the above-well geological stratification information.
In some embodiments, further comprising: carrying out gridding treatment on the fault block oil reservoir geological model;
determining the fault block trap of the butt joint seal according to the fault block oil reservoir geological model and the preset lithologic butt joint profile plate, and the method comprises the following steps:
analyzing the butt joint relation of the stratums at two sides of the fault through the preset lithology butt joint section plate;
and screening out the fault block trap which is in butt joint closure from the fault block oil reservoir geological model after gridding treatment according to the butt joint relation.
In some embodiments, the gridding the fault reservoir geological model comprises:
projecting the fault model and the horizon model onto a plane to generate a plane map;
determining the spreading direction of the fault on a plane and the distribution range of the stratum on the plane from the plane map;
setting a grid step length according to the distribution range, setting a grid direction according to the spreading direction, and generating a plane grid;
and setting vertical grid intervals, and generating a three-dimensional grid by matching with the planar grid.
In order to solve the problem that the blocking performance of the fault block trap cannot be quantitatively determined at present, the second aspect of the invention also provides an exploration auxiliary method, which comprises the following steps:
quantitatively determining the sealing performance of each broken block trap by adopting a sealing index factor; wherein the fault block trap is determined by a fault block trap determination method as described above;
calculating the oil-gas reserves of the fault blocks under the constraint of the sealing performance of each fault block trap;
and (4) assisting to explore the research work area where the target fault is located according to the sealing performance of each fault block trap and the oil-gas reserves of the corresponding fault block.
In some embodiments, the calculating hydrocarbon reserves of the fault block under the containment performance constraint of each fault block trap comprises:
calculating the maximum oil gas height which can be borne by each fault block under the constraint of the sealing performance of each fault block trap;
and calculating the corresponding oil gas reserves according to the maximum oil gas height of each fault block.
In certain embodiments, the fault reservoir geological model is gridded; the calculation of the maximum oil gas height which can be borne by each fault block under the constraint of the sealing performance of each fault block trap comprises the following steps:
determining the closed index factor according to the VSH value of the logging data and the fault distance of the fracture in each grid;
calculating the maximum oil gas height according to the corresponding relation between the sealing index factor and the maximum oil gas height which can be borne by the fault block under the sealing performance constraint; and determining the corresponding relation according to the density of water components in the stratum, the density of oil components, the gravity acceleration and the related constants of block characteristics in the research work area.
In some embodiments, the assisting in exploring the research region in which the target fault is located according to the sealing performance of each fault block trap and the oil and gas reserves of the corresponding fault block comprises:
sequencing each broken block trap according to the sealing performance of each broken block trap and the oil-gas reserves to generate a trap sequence;
and screening the broken block traps positioned in front of the set position from the trap sequence, and exploring each broken block trap according to the front-back sequence of the trap sequence in which the broken block traps are positioned.
A third aspect of the present invention provides a broken block trap determining apparatus, including:
the information determination module is used for determining fault information and layer information in the region according to the post-stack seismic data of the region where the target fault is located;
the model generation module is used for generating a fault block oil reservoir geological model according to the fault information and the layer information;
and the fault block trapping determining module is used for determining the fault block trapping of the butt joint seal according to the fault block oil reservoir geological model and the preset lithologic butt joint profile plate.
In certain embodiments, the fault information includes fault properties, fault dip, fault offset; and/or the presence of a gas in the gas,
the horizon information comprises layering conditions, stratigraphic dip angles, stratigraphic thicknesses and stratigraphic depths of all the stratums.
In certain embodiments, the fault block reservoir geological model comprises a fault model and a fault block model; the model generation module comprises:
a fault model generation unit which carries out three-dimensional structure modeling on a fault according to the fault information to obtain the fault model;
and the horizon model generating unit is used for carrying out three-dimensional structure modeling on the stratum according to the horizon information to obtain the horizon model.
In some embodiments, the fault block trap determination apparatus further comprises:
the aboveground geological stratification information acquisition module is used for carrying out aboveground geological stratification according to the logging data to obtain aboveground geological stratification information;
and the constraint correction module is used for constraining and/or correcting the horizon model by utilizing the aboveground geological stratification information.
In some embodiments, further comprising:
the gridding processing module is used for gridding the fault block oil reservoir geological model; wherein the content of the first and second substances,
the broken block trap determining module comprises:
the butt joint relation determining unit analyzes the butt joint relation of the stratums at two sides of the fault through the preset lithologic butt joint profile plate;
and the fault block trap determining unit is used for screening out the fault block traps which are in butt joint closure from the fault block oil reservoir geological model after gridding treatment according to the butt joint relation.
In some embodiments, the gridding processing module comprises:
a projection unit that projects the tomographic model and the horizon model onto a plane to generate a plane map;
the distribution determining unit is used for determining the distribution direction of the fault on the plane and the distribution range of the stratum on the plane from the plane map;
the plane grid generating unit is used for setting grid step length according to the distribution range and setting grid direction according to the spreading direction to generate a plane grid;
and the three-dimensional grid generating unit is used for setting vertical grid intervals and generating three-dimensional grids by matching with the planar grids.
In a fourth aspect, an embodiment of the invention provides a survey assistance apparatus comprising:
the sealing performance determining module is used for quantitatively determining the sealing performance of each broken block trap by adopting a sealing index factor; wherein the fault block trap is determined by a fault block trap determination device as described above;
the oil gas reserves confirm the module, calculate the oil gas reserves of the broken block under the performance constraint of the closure of each broken block trap;
and the exploration auxiliary module is used for assisting in exploring a research work area where the target fault is located according to the sealing performance of each fault block trap and the oil-gas reserves of the corresponding fault blocks.
In certain embodiments, the hydrocarbon reserve determination module comprises:
the maximum oil gas height determining unit is used for calculating the maximum oil gas height which can be borne by each fault block under the constraint of the sealing performance of each fault block trap;
and the oil gas reserve calculation unit calculates the corresponding oil gas reserve according to the maximum oil gas height of each fault block.
In certain embodiments, the fault reservoir geological model is gridded; the maximum hydrocarbon height determining unit includes:
the closed index factor determining unit is used for determining the closed index factor according to the VSH value of the logging data and the fault distance of the fracture in each grid;
the maximum oil gas height calculating unit is used for calculating the maximum oil gas height according to the corresponding relation between the sealing index factor and the maximum oil gas height which can be borne by the fault block under the sealing performance constraint; and determining the corresponding relation according to the density of water components in the stratum, the density of oil components, the gravity acceleration and the related constants of block characteristics in the research work area.
In some embodiments, the survey assistance module comprises:
the trap sequence generating unit is used for sequencing each broken block trap according to the trapping performance of each broken block trap and the oil-gas reserves to generate a trap sequence;
and the sequential exploration unit screens the fault block trap before the set position from the trap sequence, and explores each fault block trap according to the front and back sequence of the trap sequence in which the fault block trap is positioned.
A fifth aspect of the present invention provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method for determining a broken block trap as described above when executing the program.
A sixth aspect of the invention provides a computer readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of determining a broken block trap as described above.
The invention has the following beneficial effects:
according to the method and the device for determining the fault block trap, provided by the invention, on one hand, the fault block trap closed in butt joint can be accurately and quickly obtained by establishing a fault block oil reservoir geological model and combining a lithologic butt joint profile plate, and the fault block trap closed in butt joint belongs to class I traps, so that the seal is good; on the other hand, the method for quantitatively determining the trap sealing performance of the fault block by considering the trapping resource amount of the sealing capacity and the maximum hydrocarbon column height is provided, the main factor of the trapped oil-gas resource amount is accurately and objectively described, the method has the advantages of normative operation process, scientific and advanced evaluation method and comprehensive consideration factors, the reliability and the accuracy of the evaluation result of the fault block trapping are improved, the risk and the cost of exploration and development are greatly reduced, the exploration deployment and decision success rate is remarkably improved, and the method has good technical effect and application prospect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some examples of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 shows one of the flow diagrams of a method for determining a broken block trap in the embodiment of the present invention.
Fig. 2 is a second schematic flow chart of a method for determining a broken block trap according to an embodiment of the present invention.
Fig. 3 is a third schematic flow chart of a method for determining a broken block trap according to an embodiment of the present invention.
Fig. 4 shows a fourth flowchart of a method for determining a broken block trap according to an embodiment of the present invention.
FIG. 5 shows a schematic diagram of a fractured reservoir geological model structure in an embodiment of the invention.
FIG. 6 shows a schematic diagram of a lithologic docking profile plate in an embodiment of the present invention.
FIG. 7 is a flow chart of a method of assisting exploration according to an embodiment of the present invention.
Fig. 8 is a schematic structural diagram of an interruption block trap determination device according to an embodiment of the present invention.
FIG. 9 shows a schematic diagram of a survey assistance apparatus according to an embodiment of the invention.
FIG. 10 shows a schematic diagram of an electronic device suitable for use in implementing embodiments of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of a first aspect of the present invention provides a method for determining a broken block trap, including:
s101: and determining fault information and layer information in the region according to the post-stack seismic data of the region where the target fault is located.
In specific implementation, "the located area" in step S1 is set according to a preset range. The region is the region of the work area where the fault under study is located. The fault is a structure in which rock strata or rock masses are obviously displaced along a fracture surface, and the fault is widely developed in the crust and is one of the most important structures of the crust. Breaking blocks: refers to a structural mass within the rock collar bounded by a fracture structure. And (3) trapping: is a place which can prevent oil and gas from continuously moving and can be gathered in the place.
In this step, the fault information specifically includes: fault property, fault dip angle, fault distance and the like, and the section spreading rule can be obtained through the information. The level information specifically includes: the stratigraphic conditions of all the formations, the formation dip angle, the formation thickness and the formation depth.
For example, in some embodiments, fault information and horizon information are determined from the post-stack seismic data, and in particular, from the three-dimensional post-stack seismic data volume, the three-dimensional post-stack seismic data volume is loaded into specialized three-dimensional seismic data interpretation software, such as Geoesat or landmark, to perform three-dimensional structural interpretation, thereby respectively interpreting the horizon data information and the fault data information.
S102: and generating a fault block oil reservoir geological model according to the fault information and the layer information.
In some embodiments, the fault block reservoir geological model specifically comprises a fault model and a stratum model, and specifically, the fault model is constructed based on fault information and the stratum model is constructed based on horizon information.
For example, as shown in fig. 5, a fault may be modeled by a three-dimensional structure according to the fault information to obtain the fault model, and a stratum may be modeled by a three-dimensional structure according to the level information to obtain the level model.
S103: and determining the fault block trap of the butt joint seal according to the fault block oil reservoir geological model and a preset lithologic butt joint profile plate.
In some embodiments, the predetermined lithology docking plate is shown in fig. 6, where it can be seen that blue represents mudstone, red represents sandstone, and if mudstone to sandstone, both sides of the fault represent a docking seal. Sandstone represents no seal to sandstone. The lithologic butt-joint chart can analyze the butt-joint relation of stratums at two sides of a fault, and the butt-joint closed fault block trap can be obtained by combining a fault block reservoir geological model.
In some embodiments, a lithology docking plate may be obtained by:
and (3) carrying out a shale content difference value through shale content curves of two wells of the two fault trays, wherein according to empirical values, shale with the shale content of more than 40% and sandstone with the shale content of less than 40% are obtained, and a lithology butt joint profile plate is obtained.
From the above description, it can be seen that the method for determining the fault block trap in the embodiment of the present invention can accurately and quickly obtain the fault block trap closed in the butt joint by establishing the fault block reservoir geological model and combining the lithologic butt joint profile plate, and the fault block trap closed in the butt joint belongs to the class I trap and has good sealing property.
In a preferred embodiment, in order to ensure the accuracy of the horizon model, as shown in fig. 2, the method for determining a fault block trap in the present invention further includes:
s01: carrying out aboveground geological stratification according to the logging data to obtain aboveground geological stratification information;
s02: and constraining and/or correcting the horizon model by utilizing the above-well geological stratification information.
As will be appreciated by those skilled in the art, well log data includes: gamma curve data, acoustic curve data, resistivity curve data, and mudiness content curve data, which are not described herein.
The horizon model is restrained and corrected by using the geological stratification on the well, so that the precision of the fault block oil reservoir geological model of the three-dimensional geological structure can be improved.
In particular, in the embodiment, the structural model is constrained and corrected by using the layered information on the logging, so that the accuracy of the seismic data is greatly improved. The horizon of the construction model is restrained and corrected by using the layering information on the logging, namely the layering on the logging is A, the corresponding construction surface model A can be correspondingly obtained on the earthquake, but the accuracy of the earthquake data is low, the construction surface model A is not accurate enough, and the layering A on the logging is used for matching and restraining, so that the construction surface model approaches to the real condition. Thereby improving the structural surface accuracy of the seismic data.
Furthermore, in some embodiments, the method for determining a fault block trap of the present invention further comprises:
and carrying out gridding treatment on the fault block oil reservoir geological model.
In this embodiment, as shown in fig. 3, step S103 specifically includes:
s131: analyzing the butt joint relation of the stratums at two sides of the fault through the preset lithology butt joint section plate;
s132: and screening out the fault block trap which is in butt joint closure from the fault block oil reservoir geological model after gridding treatment according to the butt joint relation.
In one embodiment, as shown in fig. 4, the step of gridding is:
s011: projecting the fault model and the horizon model onto a plane to generate a plane map;
s012: determining the spreading direction of the fault on a plane and the distribution range of the stratum on the plane from the plane map;
s013: setting a grid step length according to the distribution range, setting a grid direction according to the spreading direction, and generating a plane grid;
s014: and setting vertical grid intervals, and generating a three-dimensional grid by matching with the planar grid.
Specifically, the three-dimensional geological model is projected onto a plane, the projection elements comprise a stratum and a fault, the distribution range of the stratum on the plane is obtained, and the distribution rule of the fault on the plane is obtained. Then, on a plane graph, grid step length is set according to the size of a plane distribution range, and grid direction is set according to the fault distribution direction, wherein the grid direction and the fault direction are good in parallel. And finally, distributing the plane grids in a vertical direction to obtain a three-dimensional grid, wherein the grid spacing in the vertical direction can be reasonably set according to the precision requirement.
A specific scenario is shown below to illustrate the core concept of the present invention in detail.
It can be known that one of the core ideas of the invention is to qualitatively analyze the fault block trap by combining a lithologic butt-joint profile plate through an accurate fault block reservoir geological model, and from the above description, the fault block trap determining method provided by the first aspect of the invention can accurately and quickly obtain the butt-joint closed fault block trap, and the butt-joint closed fault block trap belongs to class I trap and has good closure.
Furthermore, the second core concept of the invention is to guide the exploration work of a research work area by quantitatively evaluating the oil-gas reserves of the broken block trap, and solve the problem that the closure performance of the broken block trap cannot be quantitatively determined at present.
In a second aspect, the invention provides a method for assisting exploration, as shown in fig. 7, which specifically includes:
s201: and quantitatively determining the sealing performance of each fault block trap by adopting a sealing index factor.
In this step, the broken block trap is determined according to the broken block trap determination method provided in the first aspect of the present invention, and details are not described herein.
The sealing performance is determined according to the sealing index factor, and in a specific embodiment, for the block reservoir geological model subjected to the gridding treatment, the sealing performance of each grid on the section of the block reservoir geological model is calculated by adopting the sealing index factor GSR.
S202: and calculating the oil-gas reserves of the fault blocks under the constraint of the sealing performance of each fault block trap.
Specifically, in one embodiment, the steps include:
s221: calculating the maximum oil gas height which can be borne by each fault block under the constraint of the sealing performance of each fault block trap;
s222: and calculating the corresponding oil gas reserves according to the maximum oil gas height of each fault block.
For example, in step S21, the blocking indicator factor is first determined according to the VSH value of the well log data and the fracture distance of the fracture in each grid; then calculating the maximum oil gas height according to the corresponding relation between the sealing index factor and the maximum oil gas height which can be borne by the fault block under the sealing performance constraint; and determining the corresponding relation according to the density of water components in the stratum, the density of oil components, the gravity acceleration and the related constants of block characteristics in the research work area.
For example, in sand-butt joint type traps on two sides of a section, a seal index factor GSR is used to calculate the seal performance of each grid on the section in a geological model, and the specific calculation mode refers to the following formula:
where VSH is derived from the VSH values of the well log data after gridding and the standoff D is derived from the standoff of the fracture in each grid.
In one embodiment, a closure evaluation quantitative index factor is obtained through the algorithm, and a closure index is calculated for the broken block trap of the sand docking type after screening.
In addition, the oil gas height is calculated according to a functional relation between the sealing index factor and the maximum oil gas height which can be borne by the fault block under the constraint of sealing performance, and the specific calculation method is participated in the following formula:
H＝f(GSR)
wherein H is the hydrocarbon column height. GSR is a blocking index factor.
In one embodiment, the specific calculation and functional expression is in accordance with the following formula:
wherein GSR is a sealing index factor rhowAnd ρoDensity of water and oil, respectively, g is acceleration of gravity. M, N are constants associated with the block features.
And calculating the maximum oil-gas hydrocarbon column height which can be sealed under the corresponding sealing performance constraint by the fault block trap according to the calculation mode.
S203: and (4) assisting to explore the research work area where the target fault is located according to the sealing performance of each fault block trap and the oil-gas reserves of the corresponding fault block.
In some embodiments, the step specifically comprises:
s231: sequencing each broken block trap according to the sealing performance of each broken block trap and the oil-gas reserves to generate a trap sequence;
s232: and screening the broken block traps positioned in front of the set position from the trap sequence, and exploring each broken block trap according to the front-back sequence of the trap sequence in which the broken block traps are positioned.
The exploration auxiliary method provided by the second aspect of the invention provides a method for quantitatively determining the sealing performance of the trap by considering the trapping resource amount of the sealing capacity and the maximum hydrocarbon column height, accurately and objectively describes the main factor of the trapped oil-gas resource amount, has the advantages of normative operation process, scientific and advanced evaluation method and comprehensive consideration of factors, improves the reliability and accuracy of the evaluation result of the trap, greatly reduces the risk and cost of exploration and development, remarkably improves the exploration deployment and decision success rate, and has good technical effect and application prospect.
For example, the amount of the fault trapping resource calculated by the volume method based on the maximum hydrocarbon column height is based on the true trapping capacity of the fault trapping and is the maximum estimated trapping resource amount, and the calculation result is referred to table 1.
TABLE 1-Break trap preferred queuing Table
As can be seen from table 1, D4 is ranked first because the reserves scale reaches 60.3 ten thousand tons, and D7 is not closed as a preferred exploration, resulting in almost no oil reserves, and it can be understood that the trap queuing is preferably performed from large to small according to the evaluation result of the clockwork trap closure and the calculated trap resource amount, and exploration deployment is preferentially performed on traps with good trap resource amount, good closure and high oil abundance.
The method is characterized in that a fault block trapping fault blocking capacity analysis method is adopted to evaluate the trapping resource quantity of the maximum hydrocarbon column height, and the trapping resource quantity of the trapping is accurately and objectively described. The method has important significance for improving the problems of single consideration factor and parameter, large resource deviation, inaccurate hydrocarbon column height, low reliability and the like in the prior optimal queuing process of the fault block trap and improving the reliability and accuracy of the evaluation result of the fault block trap. The method has the advantages of achieving good technical effect, greatly reducing the risk and cost of exploration and development, remarkably improving the success rate of exploration deployment and decision making, and having good technical effect and application prospect.
Based on the same inventive concept, the present invention further provides a device for determining a fault block trap in a virtual device level, as shown in fig. 8, including:
the information determining module 101 is used for determining fault information and layer information in the region according to the post-stack seismic data of the region where the target fault is located;
the model generation module 102 is used for generating a fault block oil reservoir geological model according to the fault information and the layer information;
and a fault block trap determining module 103 for determining a fault block trap of the butt joint seal according to the fault block oil reservoir geological model and the preset lithologic butt joint profile plate.
The device for determining the fault block trap provided by the invention can be known to accurately and quickly obtain the fault block trap closed in the butt joint by establishing a fault block oil reservoir geological model and combining a lithologic butt joint section chart, and the fault block trap closed in the butt joint belongs to class I traps and has good seal.
Based on the same inventive concept, in one embodiment, the fault information includes fault properties, fault dip angles and fault distances; and/or the presence of a gas in the gas,
the horizon information comprises layering conditions, stratigraphic dip angles, stratigraphic thicknesses and stratigraphic depths of all the stratums.
Based on the same inventive concept, in one embodiment, the fault block reservoir geological model comprises a fault model and a fault block model; the model generation module comprises:
a fault model generation unit which carries out three-dimensional structure modeling on a fault according to the fault information to obtain the fault model;
and the horizon model generating unit is used for carrying out three-dimensional structure modeling on the stratum according to the horizon information to obtain the horizon model.
Based on the same inventive concept, in an embodiment, the apparatus for determining a broken block trap further includes:
the aboveground geological stratification information acquisition module is used for carrying out aboveground geological stratification according to the logging data to obtain aboveground geological stratification information;
and the constraint correction module is used for constraining and/or correcting the horizon model by utilizing the aboveground geological stratification information.
Based on the same inventive concept, in an embodiment, the method further includes:
the gridding processing module is used for gridding the fault block oil reservoir geological model; wherein the content of the first and second substances,
the broken block trap determining module comprises:
the butt joint relation determining unit analyzes the butt joint relation of the stratums at two sides of the fault through the preset lithologic butt joint profile plate;
and the fault block trap determining unit is used for screening out the fault block traps which are in butt joint closure from the fault block oil reservoir geological model after gridding treatment according to the butt joint relation.
Based on the same inventive concept, in an embodiment, the gridding processing module includes:
a projection unit that projects the tomographic model and the horizon model onto a plane to generate a plane map;
the distribution determining unit is used for determining the distribution direction of the fault on the plane and the distribution range of the stratum on the plane from the plane map;
the plane grid generating unit is used for setting grid step length according to the distribution range and setting grid direction according to the spreading direction to generate a plane grid;
and the three-dimensional grid generating unit is used for setting vertical grid intervals and generating three-dimensional grids by matching with the planar grids.
Based on the same inventive concept, the fourth aspect of the present invention further provides a survey assistance device, as shown in fig. 9, which specifically includes:
the sealing performance determining module 201 is used for quantitatively determining the sealing performance of each broken block trap by adopting a sealing index factor; wherein the fault block trap is determined by the fault block trap determining device;
the oil gas reserves determination module 202 is used for calculating the oil gas reserves of the fault blocks under the constraint of the sealing performance of each fault block trap;
and the exploration auxiliary module 203 is used for assisting in exploring a research work area where the target fault is located according to the sealing performance of each fault block trap and the oil and gas reserves of the corresponding fault block.
The exploration auxiliary device provided by the invention provides a method for quantitatively determining the sealing performance of the trap by considering the trapping resource amount of the sealing capacity and the maximum hydrocarbon column height, accurately and objectively describes the main factor of the trapped oil and gas resource amount, has the advantages of normative operation process, scientific and advanced evaluation method and comprehensive consideration of factors, improves the reliability and accuracy of the evaluation result of the trap, greatly reduces the risk and cost of exploration and development, remarkably improves the exploration deployment and decision success rate, and has good technical effect and application prospect.
Based on the same inventive concept, in one embodiment, the oil and gas reserve determination module includes:
the maximum oil gas height determining unit is used for calculating the maximum oil gas height which can be borne by each fault block under the constraint of the sealing performance of each fault block trap;
and the oil gas reserve calculation unit calculates the corresponding oil gas reserve according to the maximum oil gas height of each fault block.
Based on the same inventive concept, in one embodiment, the fault block reservoir geological model is subjected to gridding treatment; the maximum hydrocarbon height determining unit includes:
the closed index factor determining unit is used for determining the closed index factor according to the VSH value of the logging data and the fault distance of the fracture in each grid;
the maximum oil gas height calculating unit is used for calculating the maximum oil gas height according to the corresponding relation between the sealing index factor and the maximum oil gas height which can be borne by the fault block under the sealing performance constraint; and determining the corresponding relation according to the density of water components in the stratum, the density of oil components, the gravity acceleration and the related constants of block characteristics in the research work area.
Based on the same inventive concept, in one embodiment, the exploration auxiliary module comprises:
the trap sequence generating unit is used for sequencing each broken block trap according to the trapping performance of each broken block trap and the oil-gas reserves to generate a trap sequence;
and the sequential exploration unit screens the fault block trap before the set position from the trap sequence, and explores each fault block trap according to the front and back sequence of the trap sequence in which the fault block trap is positioned.
The fifth aspect of the present invention further provides a specific implementation manner of an electronic device capable of implementing all the steps in the method in the foregoing embodiment, and referring to fig. 10, the electronic device specifically includes the following contents:
a processor (processor)601, a memory (memory)602, a communication interface (communications interface) 603, and a bus 604;
the processor 601, the memory 602 and the communication interface 603 complete mutual communication through the bus 604;
the processor 601 is configured to call the computer program in the memory 602, and the processor implements all the steps of the method in the above embodiments when executing the computer program, for example, the processor implements the steps S101 to S103, and/or S201 to S203 when executing the computer program.
From the above description, on one hand, the electronic device provided by the invention can accurately and quickly obtain the butt-sealed fault block trap by establishing the fault block oil reservoir geological model and combining the lithologic butt-joint section plate, and the butt-sealed fault block trap belongs to class I traps and has good sealing property; on the other hand, the method for quantitatively determining the trap sealing performance of the fault block by considering the trapping resource amount of the sealing capacity and the maximum hydrocarbon column height is provided, the main factor of the trapped oil-gas resource amount is accurately and objectively described, the method has the advantages of normative operation process, scientific and advanced evaluation method and comprehensive consideration factors, the reliability and the accuracy of the evaluation result of the fault block trapping are improved, the risk and the cost of exploration and development are greatly reduced, the exploration deployment and decision success rate is remarkably improved, and the method has good technical effect and application prospect.
The sixth aspect of the present invention also provides a computer-readable storage medium capable of implementing all the steps of the method in the above embodiments, wherein the computer-readable storage medium stores thereon a computer program which, when executed by a processor, implements all the steps of the method in the above embodiments, for example, the processor implements the above steps S101 to S103, and/or S201 to S203 when executing the computer program.
From the above description, on one hand, the computer-readable storage medium provided by the invention can accurately and quickly obtain the butt-sealed fault block trap by establishing the fault block reservoir geological model and combining the lithologic butt-joint profile plate, and the butt-sealed fault block trap belongs to the class I trap and has good sealing property; on the other hand, the method for quantitatively determining the trap sealing performance of the fault block by considering the trapping resource amount of the sealing capacity and the maximum hydrocarbon column height is provided, the main factor of the trapped oil-gas resource amount is accurately and objectively described, the method has the advantages of normative operation process, scientific and advanced evaluation method and comprehensive consideration factors, the reliability and the accuracy of the evaluation result of the fault block trapping are improved, the risk and the cost of exploration and development are greatly reduced, the exploration deployment and decision success rate is remarkably improved, and the method has good technical effect and application prospect.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the hardware + program class embodiment, since it is substantially similar to the method embodiment, the description is simple, and the relevant points can be referred to the partial description of the method embodiment. Although embodiments of the present description provide method steps as described in embodiments or flowcharts, more or fewer steps may be included based on conventional or non-inventive means. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an actual apparatus or end product executes, it may execute sequentially or in parallel (e.g., parallel processors or multi-threaded environments, or even distributed data processing environments) according to the method shown in the embodiment or the figures. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the presence of additional identical or equivalent elements in a process, method, article, or apparatus that comprises the recited elements is not excluded. For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, in implementing the embodiments of the present description, the functions of each module may be implemented in one or more software and/or hardware, or a module implementing the same function may be implemented by a combination of multiple sub-modules or sub-units, and the like. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks. As will be appreciated by one skilled in the art, embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, embodiments of the present description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present description may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein. The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the specification. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. The above description is only an example of the embodiments of the present disclosure, and is not intended to limit the embodiments of the present disclosure. Various modifications and variations to the embodiments described herein will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present specification should be included in the scope of the claims of the embodiments of the present specification.
Claims (22)
1. A method for determining a fault block trap, comprising:
determining fault information and layer information in the region according to the post-stack seismic data of the region where the target fault is located;
generating a fault block oil reservoir geological model according to the fault information and the layer information;
and determining the fault block trap of the butt joint seal according to the fault block oil reservoir geological model and a preset lithologic butt joint profile plate.
2. The fault block trap determination method of claim 1, wherein the fault information comprises fault properties, fault dip, fault offset; and/or the presence of a gas in the gas,
the horizon information comprises layering conditions, stratigraphic dip angles, stratigraphic thicknesses and stratigraphic depths of all the stratums.
3. The method of fault block trapping determination of claim 2, wherein the fault block reservoir geological model comprises a fault model and a fault block model; the generating of the fault block oil reservoir geological model according to the fault information and the layer information comprises the following steps:
carrying out three-dimensional construction modeling on the fault according to the fault information to obtain the fault model;
and carrying out three-dimensional structure modeling on the stratum according to the horizon information to obtain the horizon model.
4. The method of claim 3, further comprising:
carrying out aboveground geological stratification according to the logging data to obtain aboveground geological stratification information;
and constraining and/or correcting the horizon model by utilizing the above-well geological stratification information.
5. The method of fault block trap determination of claim 1, further comprising: carrying out gridding treatment on the fault block oil reservoir geological model;
determining the fault block trap of the butt joint seal according to the fault block oil reservoir geological model and the preset lithologic butt joint profile plate, and the method comprises the following steps:
analyzing the butt joint relation of the stratums at two sides of the fault through the preset lithology butt joint section plate;
and screening out the fault block trap which is in butt joint closure from the fault block oil reservoir geological model after gridding treatment according to the butt joint relation.
6. The method of determining fault block trapping according to claim 5, wherein said gridding the fault block reservoir geological model comprises:
projecting the fault model and the horizon model onto a plane to generate a plane map;
determining the spreading direction of the fault on a plane and the distribution range of the stratum on the plane from the plane map;
setting a grid step length according to the distribution range, setting a grid direction according to the spreading direction, and generating a plane grid;
and setting vertical grid intervals, and generating a three-dimensional grid by matching with the planar grid.
7. A method of survey assistance, comprising:
quantitatively determining the sealing performance of each broken block trap by adopting a sealing index factor; wherein the fault block trap is determined by a fault block trap determination method according to any of claims 1-6;
calculating the oil-gas reserves of the fault blocks under the constraint of the sealing performance of each fault block trap;
and (4) assisting to explore the research work area where the target fault is located according to the sealing performance of each fault block trap and the oil-gas reserves of the corresponding fault block.
8. The survey assistance method of claim 7 wherein the calculating hydrocarbon reserves for the fault under the containment performance constraints of each fault trap comprises:
calculating the maximum oil gas height which can be borne by each fault block under the constraint of the sealing performance of each fault block trap;
and calculating the corresponding oil gas reserves according to the maximum oil gas height of each fault block.
9. The method of claim 8, wherein the fault reservoir geological model is gridded; the calculation of the maximum oil gas height which can be borne by each fault block under the constraint of the sealing performance of each fault block trap comprises the following steps:
determining the closed index factor according to the VSH value of the logging data and the fault distance of the fracture in each grid;
calculating the maximum oil gas height according to the corresponding relation between the sealing index factor and the maximum oil gas height which can be borne by the fault block under the sealing performance constraint; and determining the corresponding relation according to the density of water components in the stratum, the density of oil components, the gravity acceleration and the related constants of block characteristics in the research work area.
10. The method of claim 7, wherein the step of assisting in exploring a region of interest in which a target fault is located based on the sealing performance of each fault trap and the hydrocarbon reserves of the corresponding fault comprises:
sequencing each broken block trap according to the sealing performance of each broken block trap and the oil-gas reserves to generate a trap sequence;
and screening the broken block traps positioned in front of the set position from the trap sequence, and exploring each broken block trap according to the front-back sequence of the trap sequence in which the broken block traps are positioned.
11. A fragment trap determining apparatus, comprising:
the information determination module is used for determining fault information and layer information in the region according to the post-stack seismic data of the region where the target fault is located;
the model generation module is used for generating a fault block oil reservoir geological model according to the fault information and the layer information;
and the fault block trapping determining module is used for determining the fault block trapping of the butt joint seal according to the fault block oil reservoir geological model and the preset lithologic butt joint profile plate.
12. The fault block trap determination device of claim 11 wherein the fault information comprises fault properties, fault dip, fault offset; and/or the presence of a gas in the gas,
the horizon information comprises layering conditions, stratigraphic dip angles, stratigraphic thicknesses and stratigraphic depths of all the stratums.
13. The fault block trap determination device of claim 12 wherein the fault block reservoir geological model comprises a fault model and a fault block model; the model generation module comprises:
a fault model generation unit which carries out three-dimensional structure modeling on a fault according to the fault information to obtain the fault model;
and the horizon model generating unit is used for carrying out three-dimensional structure modeling on the stratum according to the horizon information to obtain the horizon model.
14. The fault block trap determination device of claim 13, further comprising:
the aboveground geological stratification information acquisition module is used for carrying out aboveground geological stratification according to the logging data to obtain aboveground geological stratification information;
and the constraint correction module is used for constraining and/or correcting the horizon model by utilizing the aboveground geological stratification information.
15. The fault block trap determination device of claim 11, further comprising:
the gridding processing module is used for gridding the fault block oil reservoir geological model; wherein the content of the first and second substances,
the broken block trap determining module comprises:
the butt joint relation determining unit analyzes the butt joint relation of the stratums at two sides of the fault through the preset lithologic butt joint profile plate;
and the fault block trap determining unit is used for screening out the fault block traps which are in butt joint closure from the fault block oil reservoir geological model after gridding treatment according to the butt joint relation.
16. The apparatus of claim 15, wherein the gridding module comprises:
a projection unit that projects the tomographic model and the horizon model onto a plane to generate a plane map;
the distribution determining unit is used for determining the distribution direction of the fault on the plane and the distribution range of the stratum on the plane from the plane map;
the plane grid generating unit is used for setting grid step length according to the distribution range and setting grid direction according to the spreading direction to generate a plane grid;
and the three-dimensional grid generating unit is used for setting vertical grid intervals and generating three-dimensional grids by matching with the planar grids.
17. An exploration aid, comprising:
the sealing performance determining module is used for quantitatively determining the sealing performance of each broken block trap by adopting a sealing index factor; wherein the fault block trap is determined by a fault block trap determination device according to any of claims 11-16;
the oil gas reserves confirm the module, calculate the oil gas reserves of the broken block under the performance constraint of the closure of each broken block trap;
and the exploration auxiliary module is used for assisting in exploring a research work area where the target fault is located according to the sealing performance of each fault block trap and the oil-gas reserves of the corresponding fault blocks.
18. The survey assistance apparatus of claim 17 wherein the hydrocarbon reserve determination module comprises:
the maximum oil gas height determining unit is used for calculating the maximum oil gas height which can be borne by each fault block under the constraint of the sealing performance of each fault block trap;
and the oil gas reserve calculation unit calculates the corresponding oil gas reserve according to the maximum oil gas height of each fault block.
19. The exploration aid of claim 18, wherein the fault reservoir geological model is gridded; the maximum hydrocarbon height determining unit includes:
the closed index factor determining unit is used for determining the closed index factor according to the VSH value of the logging data and the fault distance of the fracture in each grid;
the maximum oil gas height calculating unit is used for calculating the maximum oil gas height according to the corresponding relation between the sealing index factor and the maximum oil gas height which can be borne by the fault block under the sealing performance constraint; and determining the corresponding relation according to the density of water components in the stratum, the density of oil components, the gravity acceleration and the related constants of block characteristics in the research work area.
20. The survey assistance device of claim 17, wherein the survey assistance module comprises:
the trap sequence generating unit is used for sequencing each broken block trap according to the trapping performance of each broken block trap and the oil-gas reserves to generate a trap sequence;
and the sequential exploration unit screens the fault block trap before the set position from the trap sequence, and explores each fault block trap according to the front and back sequence of the trap sequence in which the fault block trap is positioned.
21. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 1 to 10 when executing the program.
22. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method of any one of claims 1 to 10.
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