CN116146202B

CN116146202B - Method and device for dividing trap of reef beach carbonate rock

Info

Publication number: CN116146202B
Application number: CN202310331094.XA
Authority: CN
Inventors: 杨凤英; 印兴耀; 刘博�; 宗兆云; 张广智
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China
Priority date: 2023-03-30
Filing date: 2023-03-30
Publication date: 2023-10-13
Anticipated expiration: 2043-03-30
Also published as: CN116146202A

Abstract

The specification provides a method and a device for dividing trap of reef beach carbonate rock. The method comprises the following steps: acquiring a top layer position value, a bottom layer position value and a porosity data body of a reef beach carbonate rock target layer; determining the trap resource amount of the reef carbonate according to the top layer position value, the bottom layer position value and the porosity data body of the reef carbonate target layer; acquiring the thickness of a cover layer, the thickness of a hydrocarbon source rock and the fracture grade of the reef beach carbonate rock trap; and dividing the trap levels according to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the fracture level and the trap resource amount to obtain a plurality of trap levels. The accuracy of trap division can be improved based on the method.

Description

Method and device for dividing trap of reef beach carbonate rock

Technical Field

The specification relates to the technical field of oil and gas reservoir exploration and development, in particular to a method and a device for trapping and dividing reef beach carbonate.

Background

The trap is provided with an effective space for capturing and dispersing hydrocarbon to form oil and gas aggregation, and has the capability of storing the oil and gas, but the trap does not always have the oil and gas. Once a sufficient amount of hydrocarbon enters the trap, it fills the trap or occupies a portion of the trap, and a hydrocarbon reservoir may be formed. Carbonate reservoirs refer to the oil and gas that accumulates in carbonate traps. Reef beach type carbonate hydrocarbon reservoirs are one of the global important hydrocarbon reservoir types, and the exploration efficiency of the reef beach type carbonate hydrocarbon reservoirs can be improved by dividing the trap of the reef beach type carbonate.

At present, descriptions of the reef beach type carbonate trap are mainly developed by utilizing earthquake facies, but the method cannot accurately and effectively quantify the amount of trap resources, and cannot accurately divide the trap, so that the exploration efficiency of the oil and gas reservoir of the reef beach type carbonate is lower.

In view of the above problems, no effective solution has been proposed at present.

Disclosure of Invention

The specification provides a method and a device for dividing trap of reef beach carbonate rock, which are used for solving the problem that the trap cannot be accurately divided in the prior art, so that the oil and gas reservoir exploration efficiency is low.

In one aspect, an embodiment of the present disclosure provides a method for trapping and dividing reef beach carbonate rock, including:

acquiring a top layer position value, a bottom layer position value and a porosity data body of a reef beach carbonate rock target layer;

determining the trap resource amount of the reef carbonate according to the top layer position value, the bottom layer position value and the porosity data body of the reef carbonate target layer;

acquiring the thickness of a cover layer, the thickness of a hydrocarbon source rock and the fracture grade of the reef beach carbonate rock trap;

and dividing the trap levels according to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the fracture level and the trap resource amount to obtain a plurality of trap levels.

Further, the determining the trapped resource amount of the reef carbonate rock according to the top layer position value, the bottom layer position value and the porosity data body of the reef carbonate rock target layer comprises the following steps:

determining the trap longitudinal boundary of the reef beach carbonate according to the top layer position value and the bottom layer position value;

determining an contour line corresponding to a structural tensor threshold of the reef beach carbonate rock, and taking the contour line as a trap transverse boundary of the reef beach carbonate rock;

and determining the trapping resource quantity of the reef beach carbonate according to the trapping longitudinal boundary, the trapping transverse boundary and the porosity data body.

Further, the structure tensor threshold is determined as follows:

acquiring the structure tensor attribute of the reef beach carbonate rock;

acquiring a drilling time curve and an air measurement curve of a drilled well;

determining target structure tensor attributes corresponding to inflection point values of a drilling curve and an air measurement curve in the trap longitudinal boundary from the structure tensor attributes;

and taking the target structure tensor attribute as a structure tensor threshold of the reef beach carbonate rock.

Further, the determining the contour line corresponding to the structural tensor threshold of the reef beach carbonate rock as the trap transverse boundary of the reef beach carbonate rock includes:

Determining the structure tensor plane attribute of the reef beach carbonate rock target layer according to the top layer bit value, the bottom layer bit value and the structure tensor attribute;

forming a contour map of the structural tensor plane attribute according to the structural tensor plane attribute of the reef beach carbonate rock target layer;

and determining a corresponding contour line of the structural tensor threshold of the reef beach carbonate rock in the structural tensor plane attribute contour map, and taking the contour line as a trap transverse boundary of the reef beach carbonate rock.

Further, the acquiring the porosity data body of the reef beach carbonate rock target layer includes:

according to the top layer position value and the bottom layer position value, determining a longitudinal wave impedance data body of a reef beach carbonate rock target layer;

acquiring a fitting curve of longitudinal wave impedance to porosity;

and determining the porosity data body of the reef beach carbonate target layer according to the fitting curve of the longitudinal wave impedance data body and the longitudinal wave impedance-to-porosity.

Further, the obtaining the fracture class of the reef beach carbonate trap includes:

acquiring the coherence plane attribute and the maximum likelihood plane attribute of the top layer;

determining a first level fracture of a top horizon according to the coherence plane attribute;

determining a secondary fracture of the top horizon according to the maximum likelihood plane attribute;

Combining the primary fracture of the top layer and the secondary fracture of the top layer to obtain a fracture characterization result of the top layer of the reef beach carbonate target layer;

and determining the fracture grade of the reef beach carbonate rock trap from the fracture characterization result.

Further, the classifying the levels of the trap according to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the fracture level and the amount of the trap resources to obtain traps with multiple levels comprises:

obtaining scoring standards corresponding to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the fracture grade and the trapped resource quantity;

sequentially scoring the cap layer thickness, the hydrocarbon source rock thickness, the fracture grade and the trap resource amount according to the scoring standard to obtain a trap scoring value;

and dividing the trap grades according to the trap grading values to obtain a plurality of trap grades.

Further, after obtaining the plurality of trap levels, the method further includes:

determining the exploration priority of the oil and gas reservoir of the reef beach carbonate rock according to the trap level;

and sequentially exploring the oil and gas reservoirs of the reef beach carbonate rock according to the exploration priority.

On the other hand, the embodiment of the specification also provides a device for dividing the trap of the reef beach carbonate rock, which comprises:

The trapped resource quantity determining module is used for acquiring a top layer position value, a bottom layer position value and a porosity data body of the reef beach carbonate rock target layer; determining the trap resource amount of the reef carbonate according to the top layer position value, the bottom layer position value and the porosity data body of the reef carbonate target layer;

the index acquisition module is used for acquiring the cover layer thickness, the hydrocarbon source rock thickness and the fracture grade of the reef beach carbonate rock trap;

and the dividing module is used for dividing the trap levels according to the thickness of the cover layer, the thickness of the source rock, the fracture level and the trap resource amount to obtain a plurality of trap levels.

In still another aspect, the present application further provides a computer readable storage medium, on which computer instructions are stored, the computer readable storage medium implementing the above method for trapping and dividing reef beach carbonate rock when executing the instructions.

The method and the device for trapping and dividing the reef carbonate rock provided by the specification are characterized in that firstly, a top layer position value, a bottom layer position value and a porosity data body of a reef carbonate rock target layer are obtained; secondly, determining the trap resource amount of the reef beach carbonate according to the top layer position value, the bottom layer position value and the porosity data body of the reef beach carbonate target layer; further, the thickness of a cover layer, the thickness of a hydrocarbon source rock and the fracture grade of the reef beach carbonate rock trap are obtained; and finally, dividing the trap levels according to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the fracture level and the trap resource amount to obtain a plurality of trap levels. By the scheme, quantitative evaluation of the trap data quantity and effective division of trap levels are realized, and a foundation can be laid for subsequent efficient exploration and development of the oil and gas reservoir.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure, the drawings that are required for the embodiments will be briefly described below, and the drawings described below are only some embodiments described in the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic flow chart of a method for trapping and dividing reef carbonate rock according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an embodiment of a trap partitioning method for reef beach carbonate rock provided by the embodiments of the present specification, in one example of a scenario;

FIG. 3 is a schematic diagram of an embodiment of a trap partitioning method of reef beach carbonate rock provided by the embodiments of the present specification, in one example of a scenario;

fig. 4 is a schematic structural view of a trapping device for reef beach carbonate according to one embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.

Detailed Description

In order to make the technical solutions in the present specification better understood by those skilled in the art, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only some embodiments of the present specification, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present disclosure.

Considering that the oil and gas reservoir of reef beach type carbonate rock is one of the global important oil and gas reservoir types, the method has important significance in effectively developing the oil and gas reservoir of reef beach type carbonate rock.

Further, when a sufficient amount of oil gas enters the trap, and the trap is filled or a part of the trap is occupied, an oil gas reservoir can be formed, so that accurate description of the trap is an important precondition for realizing efficient development of the oil gas reservoir.

Along with the deep exploration and development, the reef body has larger and larger burial depth, higher and higher concealing degree and larger description difficulty, and severely restricts the oil and gas exploration and development process of the reef beach type carbonate rock. At present, the prior art mainly utilizes earthquake facies to develop the description of the reef beach type carbonate rock trap, but has the problems that the trap description precision is low, the trap resource quantity cannot be quantified, and the oil and gas reservoir development efficiency of the reef beach type carbonate rock is low.

Aiming at the problems of the prior method, the specification introduces a method for dividing the trap of the reef beach carbonate rock, and can realize quantitative description and accurate division of the trap, thereby improving the oil and gas reservoir development efficiency of the reef beach carbonate rock.

Based on the above thought, the present specification proposes a method for trapping and dividing reef carbonate rock, firstly, obtaining a top layer position value, a bottom layer position value and a porosity data body of a reef carbonate rock target layer; secondly, determining the trap resource amount of the reef beach carbonate according to the top layer position value, the bottom layer position value and the porosity data body of the reef beach carbonate target layer; further, the cover layer thickness, the hydrocarbon source rock thickness and the fracture grade of the reef beach carbonate rock are obtained; and finally, dividing the trap levels according to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the fracture level and the trap resource amount to obtain a plurality of trap levels. Referring to fig. 1, an embodiment of the present disclosure provides a method for trapping and dividing reef beach carbonate rock. In particular implementations, the method may include the following.

S101: and acquiring a top layer position value, a bottom layer position value and a porosity data body of the reef beach carbonate target layer.

In some embodiments, the reef carbonate rock may also be referred to as a reef carbonate rock or a reef phase carbonate rock, the reef carbonate target layer may be a target layer, wherein the target layer may comprise a reservoir or a reservoir of the reef carbonate rock, the reef carbonate rock further comprises a cover layer, the cover layer and the reservoir are important components forming a trap, and the cover layer may be located above the reservoir and is an impermeable rock layer capable of preventing oil and gas from escaping.

In some embodiments, the top and bottom level values of the reef carbonate layer may be obtained as follows:

s1: acquiring a synthetic seismic record and three-dimensional seismic data of a known well position of a target research area;

s2: performing well earthquake calibration on the reef carbonate target layer according to the synthetic earthquake records and the three-dimensional earthquake data to obtain an earthquake reflection event of a top layer position of the reef carbonate target layer and an earthquake reflection event of a bottom layer position of the reef carbonate target layer;

s3: performing horizon interpretation on the top level of the reef carbonate target layer along the seismic reflection of the top level of the reef carbonate target layer relative to the top level of the reef carbonate target layer to obtain a top level value of the reef carbonate target layer;

S4: and performing horizon interpretation on the bottom layer position of the reef carbonate target layer along the seismic reflection phase of the bottom layer position of the reef carbonate target layer to obtain a bottom layer position value of the reef carbonate target layer.

In some embodiments, the method may further perform well-seismic calibration on the reef carbonate layer according to the synthetic seismic records and the three-dimensional seismic data to obtain a seismic reflection event of a top layer of the reef carbonate layer and a seismic reflection event of a bottom layer of the reef carbonate layer; performing horizon interpretation on the top layer position of the reef beach carbonate cover layer along the seismic reflection of the top layer position of the reef beach carbonate cover layer relative to the corresponding axis to obtain a top layer position value of the reef beach carbonate cover layer; and performing horizon interpretation on the bottom layer position of the reef beach carbonate cover layer along the seismic reflection of the bottom layer position of the reef beach carbonate cover layer relative to the corresponding axis to obtain a bottom layer position value of the reef beach carbonate target layer.

In some embodiments, the synthetic seismic records may be obtained by convolving reflection coefficients with seismic wavelets, where well log data for a known well location in the target area of investigation may be obtained in advance, then wave impedance may be calculated from a time difference and a density curve of acoustic waves in the well log data, then reflection coefficients may be determined from the wave impedance, three-dimensional seismic data for the known well location in the target area of investigation may be obtained in advance, and then the seismic wavelets may be determined from the three-dimensional seismic data. The corresponding relation between the well logging data and the seismic data can be established by acquiring the synthetic seismic records, so that a foundation is laid for the subsequent effective seismic horizon calibration (seismic calibration) and horizon interpretation.

In some embodiments, the seismic reflection event may be a response of a geologic horizon over a seismic wave. A basis may be established for horizon interpretation by acquiring seismic reflection event. The accuracy of the horizon interpretation can be 1-channel for each of the crossline and inline intervals, i.e., the interpretation density can be 1×1.

In some embodiments, the acquiring the porosity data of the reef carbonate rock target layer may include:

s1: according to the top layer position value and the bottom layer position value, determining a longitudinal wave impedance data body of a reef beach carbonate rock target layer;

s2: acquiring a fitting curve of longitudinal wave impedance to porosity;

s3: and determining the porosity data body of the reef beach carbonate target layer according to the fitting curve of the longitudinal wave impedance data body and the longitudinal wave impedance-to-porosity.

In some embodiments, post-stack sparse pulse inversion can be performed on the three-dimensional seismic data, the logging data and the top layer position value and the bottom layer position value of the reef carbonate target layer to obtain a longitudinal wave impedance data body inverted by the reef carbonate target layer; then, according to the longitudinal wave impedance data in the logging data and the porosity data in the logging data, intersection analysis is carried out to obtain a fitting curve of the longitudinal wave impedance to the porosity; and finally, substituting the longitudinal wave impedance data body into a fitting curve of the longitudinal wave impedance to the porosity, and determining the porosity data body, wherein the porosity data body can be three-dimensional data. For example: the fitted curve of longitudinal wave impedance versus porosity may be: y=ax, where a represents the fitting parameter, x is the longitudinal wave impedance data volume, and y represents the porosity data volume.

The data foundation can be laid for the follow-up determination of the trapped resource amount by acquiring the top layer position value, the bottom layer position value and the porosity data body of the reef beach carbonate rock target layer.

S102: and determining the trapped resource quantity of the reef carbonate according to the top layer position value and the bottom layer position value of the reef carbonate target layer and the porosity data body.

In some embodiments, the determining the trapped resource amount of the reef carbonate according to the top layer position value, the bottom layer position value, and the porosity data body of the reef carbonate target layer may include:

s1: determining the trap longitudinal boundary of the reef beach carbonate according to the top layer position value and the bottom layer position value;

s2: determining an contour line corresponding to a structural tensor threshold of the reef beach carbonate rock, and taking the contour line as a trap transverse boundary of the reef beach carbonate rock;

s3: and determining the trapping resource quantity of the reef beach carbonate according to the trapping longitudinal boundary, the trapping transverse boundary and the porosity data body.

In some embodiments, after the top and bottom level values of the reef carbonate layer of interest are obtained, a range between the top and bottom level values of the reef carbonate layer of interest may be taken as the trap longitudinal boundary.

In some embodiments, the trap lateral boundary may be determined as follows:

first, a structural tensor threshold for reef beach carbonate rock is determined, which can be determined as follows:

s1: acquiring the structure tensor attribute of the reef beach carbonate rock;

s2: acquiring a drilling time curve and an air measurement curve of a drilled well;

s3: determining target structure tensor attributes corresponding to inflection point values of a drilling curve and an air measurement curve in the trap longitudinal boundary from the structure tensor attributes;

s4: and taking the target structure tensor attribute as a structure tensor threshold of the reef beach carbonate rock.

Secondly, determining an contour line corresponding to a structural tensor threshold of the reef beach carbonate rock as a trap transverse boundary of the reef beach carbonate rock, and when in specific implementation, the method can comprise the following steps:

s1: determining the structure tensor plane attribute of the reef beach carbonate rock target layer according to the top layer bit value, the bottom layer bit value and the structure tensor attribute;

s2: forming a contour map of the structural tensor plane attribute according to the structural tensor plane attribute of the reef beach carbonate rock target layer;

s3: and determining a corresponding contour line of the structural tensor threshold of the reef beach carbonate rock in the structural tensor plane attribute contour map, and taking the contour line as a trap transverse boundary of the reef beach carbonate rock.

In some embodiments, the structural tensor properties of the reef beach carbonate rock may be obtained using the three-dimensional seismic data described above.

In some embodiments, the drilling time value on the drilling time curve can record the speed of drilling, the gas measurement value on the gas measurement curve can record the oil gas display condition, and the inflection point corresponding to the fact that the drilling time value on the drilling time curve is lowered and the gas measurement value on the gas measurement curve is raised can be determined in the range between the top layer position value and the bottom layer position value of the reef beach carbonate target layer in the longitudinal boundary of the trap, and the structure tensor attribute corresponding to the inflection point is used as the structure tensor threshold of the reef beach carbonate.

In some embodiments, a plurality of contour lines may be recorded in the contour line of the structural tensor plane attribute, a contour line corresponding to the structural tensor threshold or a contour line to which the structural tensor threshold belongs may be determined from the plurality of contour lines, and after the contour line corresponding to the structural tensor threshold is determined, the contour line corresponding to the structural tensor threshold may be used as a trap transverse boundary of the reef beach carbonate rock.

In some embodiments, after determining the trap longitudinal boundary, the trap transverse boundary and the porosity data body, the trap longitudinal boundary, the trap transverse boundary and the porosity data body can be input into imaging software to perform three-dimensional imaging, so as to obtain the volume of the pore data body of the reef beach carbonate target layer, and then the volume method is adopted to further determine the trap resource amount according to the volume of the pore data body. For example: the trapped resource amount can be obtained by calculation according to the following calculation formula:

G＝0.0001×V×S _gi /B _gi

Wherein G is the trapped resource quantity, and the unit is 10 ⁸ m ³ The method comprises the steps of carrying out a first treatment on the surface of the V is the volume of the pore volume; s is S _gi The original gas saturation can be 80 percent; b (B) _gi The original natural gas volume coefficient can be obtained from the drilled test data.

By acquiring the trap resource quantity, the quantitative characterization of the hydrocarbon reservoir of the reef beach type carbonate rock can be realized, and a data foundation is laid for further dividing the trap and improving the exploration efficiency of the hydrocarbon reservoir.

S103: and acquiring the cover layer thickness, the hydrocarbon source rock thickness and the fracture grade of the reef beach carbonate rock trap.

In some embodiments, the thickness of the cover layer of the reef carbonate trap may be determined according to the interpretation results of the top layer and the bottom layer of the reef carbonate cover layer, that is, the difference between the top layer position value of the reef carbonate cover layer and the bottom layer position value of the reef carbonate cover layer may be performed to obtain the cover layer thickness layer data of the reef carbonate. And determining the cover layer thickness data in the trap transverse boundary from the cover layer thickness horizon data, and taking the cover layer thickness data in the trap transverse boundary as the trap cover layer thickness if only one group of cover layer thickness data exists in the trap transverse boundary. If multiple groups of cover layer thickness data exist in the trap transverse boundary, the multiple groups of cover layer thickness data can be subjected to average processing, and the average processed cover layer thickness data is used as the trap cover layer thickness.

In some embodiments, the hydrocarbon source rock thickness of the reef beach carbonate trap described above may be obtained as follows:

s1: acquiring field outcrop data, well-drilled hydrocarbon source rock development data and three-dimensional seismic data;

s2: performing horizon calibration on the hydrocarbon source rock according to the field outcrop data, the drilled hydrocarbon source rock development data and the three-dimensional seismic data to obtain a seismic reflection event of a hydrocarbon source rock top horizon and a seismic reflection event of a hydrocarbon source rock bottom horizon;

s3: performing horizon interpretation on the hydrocarbon source rock top horizon along an earthquake reflection phase axis of the hydrocarbon source rock top horizon to obtain a hydrocarbon source rock top horizon value;

s4: performing horizon interpretation on the hydrocarbon source rock bottom horizon along the seismic reflection event of the hydrocarbon source rock bottom horizon to obtain a hydrocarbon source rock bottom horizon value;

s5: performing difference processing on the top layer position value of the hydrocarbon source rock and the bottom layer position value of the hydrocarbon source rock to obtain hydrocarbon source rock thickness layer position data;

s6: determining hydrocarbon source rock thickness horizon data in the trap transverse boundary from the hydrocarbon source rock thickness horizon data;

s7: and determining the thickness of the hydrocarbon source rock of the reef beach carbonate rock trap according to the thickness horizon data of the hydrocarbon source rock in the transverse boundary of the trap.

In some embodiments, the source rock is the material basis for the production of oil and gas. The presence or absence of source rock can be further determined by the source rock thickness, for example: if the source rock thickness is equal to 0 meter, it may be indicated that there is no source rock, and if the source rock thickness is greater than 0 meter, it may be indicated that there is source rock. The exploration potential of an area can be determined by determining the presence or absence of source rock.

In some embodiments, the hydrocarbon source rock thickness horizon data may be determined first, then the hydrocarbon source rock thickness horizon data within the trap lateral boundary may be determined, and if only one set of hydrocarbon source rock thickness horizon data exists within the trap lateral boundary, the hydrocarbon source rock thickness horizon data within the trap lateral boundary may be used as the trapped hydrocarbon source rock thickness; if a plurality of groups of hydrocarbon source rock thickness horizon data exist in the trap transverse boundary, the hydrocarbon source rock thickness horizon data can be averaged, and the hydrocarbon source rock thickness horizon data after the averaging is used as the hydrocarbon source rock thickness of the trap.

In some embodiments, the acquiring the fracture level of the reef beach carbonate rock trap may include, when implemented:

s1: acquiring the coherence plane attribute and the maximum likelihood plane attribute of the top layer;

S2: determining a first level fracture of a top horizon according to the coherence plane attribute;

s3: determining a secondary fracture of the top horizon according to the maximum likelihood plane attribute;

s4: combining the top layer position and the fracture with the secondary fracture of the top layer position to obtain a fracture characterization result of the top layer position of the reef beach carbonate target layer;

s5: and determining the fracture grade of the reef beach carbonate rock trap from the fracture characterization result.

In some embodiments, the coherence plane attribute and the maximum likelihood plane attribute of the top horizon may be obtained by: the method comprises the steps of acquiring a coherence attribute body and a maximum likelihood attribute body (three-dimensional attribute body) by utilizing the three-dimensional seismic data, combining the acquired coherence attribute body and maximum likelihood attribute body with the top level value of the reef carbonate target layer, and extracting the coherence plane attribute of the top level of the reef carbonate target layer and the maximum likelihood plane attribute of the top level of the reef carbonate target layer.

In some embodiments, fracture characterization or description of the top layer of the reef beach carbonate destination layer may be performed according to the obtained coherence plane attribute of the top layer of the reef beach carbonate destination layer and the obtained maximum likelihood plane attribute of the top layer, where the fracture characterized by the coherence plane attribute may be a first-order fracture and the fracture characterized by the maximum likelihood plane attribute may be a second-order fracture. The primary break can be considered to be greater than the secondary break. Further, the plane combination of the primary fracture and the secondary fracture can be carried out to obtain the fracture characterization result of the top layer position of the reef beach carbonate rock target layer. And finally, determining the fracture grade in the transverse boundary of the trap as the fracture grade of the trap of the reef beach carbonate from the fracture characterization result of the top layer of the reef beach carbonate target layer.

The thickness of the cover layer, the thickness of the hydrocarbon source rock and the fracture grade of the reef beach carbonate rock trap are obtained to serve as indexes of trap division, so that the accuracy of trap division is improved.

S104: and dividing the trap levels according to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the fracture level and the trap resource amount to obtain a plurality of trap levels.

In some embodiments, the classifying the trapping grades according to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the fracture grade and the trapped resource amount to obtain trapping with multiple grades may include:

s1: obtaining scoring standards corresponding to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the fracture grade and the trapped resource quantity;

s2: sequentially scoring the cap layer thickness, the hydrocarbon source rock thickness, the fracture grade and the trap resource amount according to the scoring standard to obtain a trap scoring value;

s3: and dividing the trap grades according to the trap grading values to obtain a plurality of trap grades.

In some embodiments, scoring the cap layer thickness according to the scoring criteria described above may be: the cap layer thickness threshold is set as a scoring criterion corresponding to the cap layer thickness, and when the cap layer thickness is greater than or equal to the cap layer thickness threshold or less than the cap layer thickness threshold, the cap layer thickness may be scored differently, as shown in fig. 2, if the cap layer thickness is greater than or equal to 100 meters, the cap layer thickness may be scored as 20 points, and if the cap layer thickness is less than 100 meters, the cap layer thickness may be scored as 10 points.

The scoring of the hydrocarbon source rock thickness according to the scoring criteria may be: setting a threshold value of the thickness of the hydrocarbon source rock as a scoring standard corresponding to the thickness of the hydrocarbon source rock, when the thickness of the hydrocarbon source rock is greater than the threshold value of the thickness of the hydrocarbon source rock or the thickness of the hydrocarbon source rock is equal to the threshold value of the thickness of the hydrocarbon source rock, different scoring can be performed on the thickness of the hydrocarbon source rock, and referring to fig. 2, if the thickness of the hydrocarbon source rock is greater than 0 meter, the thickness of the hydrocarbon source rock can be scored as 20, and if the thickness of the hydrocarbon source rock is equal to 0 meter, the thickness of the cover layer can be scored as 0.

The scoring of the fracture class according to the scoring criteria described above, referring to fig. 2, may be: when the fracture grade corresponding to the trap is primary fracture, the fracture grade can be scored as 30 points; when the fracture grade corresponding to the trap is a secondary fracture, the fracture grade may be scored as 20.

Scoring the trapped resource amount according to the scoring criteria as described above, referring to fig. 2, may be: setting the trapped resource quantity threshold as a scoring standard corresponding to the trapped resource quantity, and when the trapped resource quantity is greater than or equal to the first trapped resource quantity threshold or smaller than the first trapped resource quantity threshold, but greater than the second trapped resource quantity threshold or smaller than the second trapped resource quantity threshold, scoring the trapped resource quantity differently, for example: if the trapped resource quantity is more than or equal to 50 hundred million parties, the trapped resource quantity can be scored as 30 points; if the trapped resource is more than or equal to 20 hundred million and less than 50 hundred million, the amount of the trapped resource can be scored as 20 parts; if the trapped resource is less than 20 hundred million parties, the amount of trapped resource can be scored as 10 points. The first trapped resource amount threshold value is larger than the second trapped resource amount threshold value.

In some embodiments, after scoring the cap layer thickness, the source rock thickness, the fracture rating, and the trapped resource amount in order according to the scoring criteria, the trapped scoring values may be determined by multiplying the scoring values of the individual indicators by the weight coefficients corresponding to the individual indicators. And classifying the trap according to the determined score value of the trap. The higher the trap score value, the higher the level of the trap, and the higher the trap condition. Referring to fig. 2, if the final score of the trap quantization evaluation is 80 points or more, the trap may be a first-level trap; if the final score of the trap quantitative evaluation is less than 80 and more than or equal to 60, the trap quantitative evaluation can be a secondary trap; if the final score of the trap quantitative evaluation is less than 60 points, the trap can be three-stage trap.

In some embodiments, after obtaining the plurality of trap levels, when implemented, the method may further include:

s1: determining the exploration priority of the oil and gas reservoir of the reef beach carbonate rock according to the trap level;

s2: and sequentially exploring the oil and gas reservoirs of the reef beach carbonate rock according to the exploration priority.

In some embodiments, after a plurality of trap levels are obtained, the exploration priority can be determined based on the trap levels, that is, the exploration sequence can be determined, and the oil and gas reservoirs of the reef beach carbonate rock are sequentially explored based on the exploration sequence, so that the exploration efficiency of the oil and gas reservoirs of the reef beach carbonate rock can be effectively improved.

The above method is described below in connection with a specific embodiment, however, it should be noted that this specific embodiment is only for better illustrating the present application and is not meant to be a undue limitation on the present application.

Before implementation, first, a synthetic seismic record, three-dimensional seismic data, logging data, field outcrop data, drilled hydrocarbon source rock development data, a drilled time-of-drilling curve, a drilled gas logging curve of a known well location of a target research area are acquired.

Secondly, horizon calibration can be performed using the above data, such as:

the method can perform well earthquake calibration on the reef carbonate target layer and the cover layer according to the synthetic earthquake records and the three-dimensional earthquake information to obtain an earthquake reflection event of a top layer position of the reef carbonate target layer, an earthquake reflection event of a bottom layer position of the reef carbonate target layer, an earthquake reflection event of a top layer position of the reef carbonate cover layer and an earthquake reflection event of a bottom layer position of the reef carbonate cover layer.

And (3) performing horizon calibration on the hydrocarbon source rock according to the open-air outcrop data, the drilled hydrocarbon source rock development data and the three-dimensional seismic data to obtain a seismic reflection event of the hydrocarbon source rock top horizon and a seismic reflection event of the hydrocarbon source rock bottom horizon.

Then, the related horizon interpretation can be performed on the result of horizon calibration, for example:

corresponding stratum position interpretation can be carried out on the seismic reflection homophase of the top layer position of the reef carbonate target layer, the seismic reflection homophase of the bottom layer position of the reef carbonate target layer, the seismic reflection homophase of the top layer position of the reef carbonate cover layer and the seismic reflection homophase of the bottom layer position of the reef carbonate cover layer to obtain the top layer position value of the reef carbonate target layer, the bottom layer position value of the reef carbonate target layer, the top layer position value of the reef carbonate cover layer and the bottom layer position value of the reef carbonate cover layer.

The hydrocarbon source rock top level can be interpreted along the seismic reflection phase axis of the hydrocarbon source rock top level to obtain a hydrocarbon source rock top level value, and the hydrocarbon source rock bottom level can be interpreted along the seismic reflection phase axis of the hydrocarbon source rock bottom level to obtain a hydrocarbon source rock bottom level value.

The structure tensor attribute of the reef beach carbonate rock can be obtained by utilizing the three-dimensional seismic data; and obtaining a coherence attribute body and a maximum likelihood attribute body by using the three-dimensional seismic data. Longitudinal wave impedance data and porosity data may also be obtained using the logging data.

The three-dimensional seismic data, the logging data and the top layer position value and the bottom layer position value of the reef carbonate target layer can be subjected to post-stack sparse pulse inversion to obtain a longitudinal wave impedance data body inverted by the reef carbonate target layer; and then carrying out intersection analysis according to the longitudinal wave impedance data in the logging data and the porosity data in the logging data to obtain a fitting curve of the longitudinal wave impedance to the porosity. And substituting the longitudinal wave impedance data body into a fitting curve of the longitudinal wave impedance to the porosity to determine a porosity data body (three-dimensional data body).

In the implementation, firstly, the volume of a pore data body is determined according to the top layer position value, the bottom layer position value and the porosity data body of a reef carbonate target layer, and then the volume of the pore data body is used for determining the trap data volume. And secondly, determining the thickness of the trapped cover layer according to the top layer position value of the reef beach carbonate cover layer and the bottom layer position value of the reef beach carbonate cover layer. And determining the thickness of the trapped hydrocarbon source rock according to the acquired top position value of the hydrocarbon source rock and the acquired bottom position value of the hydrocarbon source rock. And extracting the coherence plane attribute and the maximum likelihood plane attribute of the top layer according to the coherence attribute body, the maximum likelihood attribute body and the top layer bit value of the reef carbonate target layer. And determining the fracture grade of the top layer position of the reef beach carbonate target layer according to the coherence plane attribute and the maximum likelihood plane attribute of the top layer position. And determining the fracture level of the trap according to the fracture level of the top layer of the beach carbonate target layer. Finally, the trap levels can be divided according to the acquired cap layer thickness, the hydrocarbon source rock thickness, the fracture level and the trap resource amount, and a plurality of trap levels are obtained. And determining the exploration priority according to the trap level, and sequentially exploring the oil and gas reservoirs of the reef beach carbonate rock based on the exploration priority. The method can realize fine depiction, resource quantity estimation and quantitative evaluation of the reef beach type carbonate rock trap, and provides technical support for efficient exploration and development of the reef beach type carbonate hydrocarbon reservoir.

In a specific scenario example, the method provided in the embodiments of the present disclosure may be applied to implement quantitative evaluation of trap. In particular, referring to fig. 3, the following steps may be included.

And step one, describing the longitudinal boundary of the trap.

1.1, acquiring synthetic seismic records, three-dimensional seismic data, logging data and field outcrop data.

1.2, carrying out well shock calibration on the reef carbonate target layer and the cover layer by the synthetic seismic record and the three-dimensional seismic data obtained in the step 1.1 to obtain a seismic reflection phase axis of a top layer position of the reef carbonate target layer, a seismic reflection phase axis of a bottom layer position of the reef carbonate target layer, a seismic reflection phase axis of a top layer position of the reef carbonate cover layer and a seismic reflection phase axis of a bottom layer position of the reef carbonate cover layer.

1.3, carrying out horizon interpretation of the seismic reflection in-phase axis of the top horizon, the bottom horizon and the top horizon of the cover layer of the reef carbonate according to the seismic reflection in-phase axis of the top horizon, the bottom horizon of the reef carbonate cover layer and the seismic reflection in-phase axis of the bottom horizon of the reef carbonate cover layer of the reef carbonate target layer determined in the step 1.2, wherein the obtained corresponding horizon interpretation results are as follows: the method comprises the steps of setting a top layer position value of a reef carbonate target layer, setting a bottom layer position value of the reef carbonate target layer, setting a top layer position value of a reef carbonate cover layer and setting a bottom layer position value of the reef carbonate cover layer. Interpretation accuracy is 1 line per line, i.e. 1 x 1 interpretation density.

1.4, the longitudinal range between the top layer position value of the reef beach carbonate target layer and the bottom layer position value of the reef beach carbonate target layer obtained in the step 1.3 can be used as a description result of the trap longitudinal boundary.

And secondly, describing the transverse boundary of the trap.

And 2.1, obtaining the structure tensor attribute of the reef beach carbonate rock by utilizing the three-dimensional seismic data.

And 2.2, determining the structural tensor threshold of the reef beach carbonate rock by utilizing the curve and the gas measurement curve when drilling is performed according to the structural tensor attribute obtained in the step 2.1.

And 2.3, extracting the structure tensor plane attribute of the reef beach carbonate target layer according to the top and bottom layer position interpretation results of the reef beach target layer obtained in the step 1.3 and the structure tensor attribute obtained in the step 2.1.

And 2.4, drawing an attribute contour map according to the structural tensor plane attribute of the reef beach carbonate target layer obtained in the step 2.3, and determining the contour line corresponding to the structural tensor threshold obtained in the step 2.2 from the contour map as a trap transverse boundary.

And thirdly, estimating the trapped resource quantity.

And 3.1, performing post-stack sparse pulse inversion by using the three-dimensional seismic data, the well logging data and the top layer position value of the reef carbonate target layer and the bottom layer position value of the reef carbonate target layer obtained in the step 1.3 to obtain a reef carbonate target layer inversion longitudinal wave impedance data body.

And 3.2, obtaining longitudinal wave impedance data and porosity data by using the well logging data, and analyzing intersection of the longitudinal wave impedance data and the porosity data to obtain a fitting curve of the longitudinal wave impedance-to-porosity.

And 3.3, inverting the longitudinal wave impedance data body according to the reef carbonate target layer obtained in the step 3.1 and obtaining the porosity data body inverted by the reef carbonate target layer according to the longitudinal wave impedance-to-porosity fitting curve obtained in the step 3.2.

And 3.4, performing three-dimensional imaging according to the trap longitudinal boundary obtained in the step 1.4, the trap transverse boundary obtained in the step 2.4 and the porosity data body inverted by the reef beach carbonate target layer obtained in the step 3.3, and determining the volume of the reef beach carbonate target layer porosity data body.

3.5, estimating the trapped resource amount by using the volume of the porosity data body of the reef carbonate target layer obtained in the step 3.4 and adopting a volumetric method:

G＝0.0001×V×S _gi /B _gi

wherein G is the trapped resource quantity, 10 ⁸ m ³ The method comprises the steps of carrying out a first treatment on the surface of the V is the volume of a reef beach carbonate target layer porosity data body; s is S _gi The original gas saturation is 80 percent; b (B) _gi Original natural gas volumetric coefficient.

Fourth, quantitatively evaluating trap

And 4.1, obtaining a coherent attribute body and a maximum likelihood attribute body by utilizing the three-dimensional seismic data.

And 4.2, extracting the coherence plane attribute and the maximum likelihood plane attribute of the top layer of the reef beach carbonate target layer according to the horizon interpretation result of the reef beach carbonate target layer obtained in the step 1.3 and the coherence attribute body and the maximum likelihood attribute body obtained in the step 4.1.

And 4.3, developing fracture plane depiction of the top layer position of the reef beach carbonate target layer according to the coherence plane attribute and the maximum likelihood plane attribute of the top layer position obtained in the step 4.2. The fracture marked by the coherence plane attribute can be a first-level fracture, and the fracture marked by the maximum likelihood plane attribute can be a second-level fracture. And carrying out plane combination on the primary fracture and the secondary fracture to obtain the fracture characterization result of the top layer of the reef beach carbonate target layer. And further determining the fracture grade of the trap according to the fracture characterization result of the top layer.

And 4.4, subtracting the top layer position data from the bottom layer bit data of the cover layer by using the top layer position interpretation results of the cover layer obtained in the step 1.3 to obtain the cover layer thickness position data, further determining the cover layer thickness position data in the trap transverse boundary in the step 2.4, and averaging the cover layer thickness position data in the trap transverse boundary to obtain the trap cover layer thickness.

And 4.5, carrying out fine calibration to determine the seismic reflection event of the top layer position and the bottom layer position of the hydrocarbon source rock according to the outdoor outcrop, the development condition of the hydrocarbon source rock which is drilled and the three-dimensional seismic data.

And 4.6, carrying out hydrocarbon source rock top and bottom layer position interpretation on the three-dimensional seismic data according to seismic reflection event of the hydrocarbon source rock top layer and the hydrocarbon source rock bottom layer obtained in the step 4.5, wherein the interpretation precision is that the interval between transverse measuring lines and longitudinal measuring lines is 1 channel, namely 1 multiplied by 1 interpretation density.

And 4.7, subtracting the hydrocarbon source rock top horizon data from the hydrocarbon source rock bottom horizon data according to the hydrocarbon source rock top and bottom horizon interpretation results obtained in the step 4.6 to obtain hydrocarbon source rock thickness horizon data, further determining the hydrocarbon source rock thickness horizon data in the trap transverse boundary in the step 2.4, and averaging the hydrocarbon source rock thickness horizon data in the trap transverse boundary to be used as the trap hydrocarbon source rock thickness. If the thickness of the source rock is equal to 0 m, no source rock exists, otherwise, the source rock exists.

And 4.8, determining the trap evaluation value by a scoring method according to the trap resource amount obtained in the step 3.5, the trap fracture grade obtained in the step 4.3, the trap cover layer thickness obtained in the step 4.4 and the hydrocarbon source rock thickness obtained in the step 4.7.

And 4.9, carrying out trap quantitative evaluation according to the trap score value obtained in the step 4.8, wherein the higher the score value is, the better the trap condition is.

Although the present description provides the method operational steps or apparatus configurations shown in the following examples or fig. 4, more or fewer operational steps or module elements may be included in the method or apparatus, either conventionally or without the inventive effort. In the steps or the structures where there is no necessary causal relationship logically, the execution order of the steps or the module structure of the apparatus is not limited to the execution order or the module structure shown in the embodiments or the drawings of the present specification. The described methods or module structures may be implemented in a device, server or end product in practice, in a sequential or parallel fashion (e.g., parallel processor or multi-threaded processing environments, or even distributed processing, server cluster implementations) as shown in the embodiments or figures.

Based on the method for trapping and dividing the reef beach carbonate rock, the specification also provides an embodiment of a trapping and dividing device for the reef beach carbonate rock. As shown in fig. 4, the trapping and dividing device for the reef beach carbonate rock specifically may include the following modules: the method comprises a trapped resource amount determining module 401, an index obtaining module 402 and a dividing module 403.

The trapped resource quantity determining module 401 may be configured to obtain a top layer bit value, a bottom layer bit value, and a porosity data body of a reef beach carbonate target layer; determining the trap resource amount of the reef carbonate according to the top layer position value, the bottom layer position value and the porosity data body of the reef carbonate target layer;

the index obtaining module 402 may be configured to obtain a cap layer thickness, a hydrocarbon source rock thickness, and a fracture level of the reef beach carbonate rock trap;

the dividing module 403 may be configured to divide the level of trapping according to the cap layer thickness, the hydrocarbon source rock thickness, the fracture level, and the trapping resource amount, so as to obtain a plurality of trapping levels.

In some embodiments, the trapped resource amount determining module 401 may specifically be configured to: determining the trap longitudinal boundary of the reef beach carbonate according to the top layer position value and the bottom layer position value; determining an contour line corresponding to a structural tensor threshold of the reef beach carbonate rock, and taking the contour line as a trap transverse boundary of the reef beach carbonate rock; and determining the trapping resource quantity of the reef beach carbonate according to the trapping longitudinal boundary, the trapping transverse boundary and the porosity data body.

In some embodiments, the trapped resource amount determining module 401 may be further specifically configured to: acquiring the structure tensor attribute of the reef beach carbonate rock; acquiring a drilling time curve and an air measurement curve of a drilled well; determining target structure tensor attributes corresponding to inflection point values of a drilling curve and an air measurement curve in the trap longitudinal boundary from the structure tensor attributes; and taking the target structure tensor attribute as a structure tensor threshold of the reef beach carbonate rock.

In some embodiments, the trapped resource amount determining module 401 may be further specifically configured to: determining the structure tensor plane attribute of the reef beach carbonate rock target layer according to the top layer bit value, the bottom layer bit value and the structure tensor attribute; forming a contour map of the structural tensor plane attribute according to the structural tensor plane attribute of the reef beach carbonate rock target layer; and determining a corresponding contour line of the structural tensor threshold of the reef beach carbonate rock in the structural tensor plane attribute contour map, and taking the contour line as a trap transverse boundary of the reef beach carbonate rock.

In some embodiments, the index obtaining module 402 may specifically be configured to: according to the top layer position value and the bottom layer position value, determining a longitudinal wave impedance data body of a reef beach carbonate rock target layer; acquiring a fitting curve of longitudinal wave impedance to porosity; and determining the porosity data body of the reef beach carbonate target layer according to the fitting curve of the longitudinal wave impedance data body and the longitudinal wave impedance-to-porosity.

In some embodiments, the index obtaining module 402 may be further specifically configured to: acquiring the coherence plane attribute and the maximum likelihood plane attribute of the top layer; determining a first level fracture of a top horizon according to the coherence plane attribute; determining a secondary fracture of the top horizon according to the maximum likelihood plane attribute; combining the primary fracture of the top layer and the secondary fracture of the top layer to obtain a fracture characterization result of the top layer of the reef beach carbonate target layer; and determining the fracture grade of the reef beach carbonate rock trap from the fracture characterization result.

In some embodiments, the above-mentioned dividing module 403 may specifically be used to: obtaining scoring standards corresponding to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the fracture grade and the trapped resource quantity; sequentially scoring the cap layer thickness, the hydrocarbon source rock thickness, the fracture grade and the trap resource amount according to the scoring standard to obtain a trap scoring value; and dividing the trap grades according to the trap grading values to obtain a plurality of trap grades.

In some embodiments, the above-mentioned dividing module 403 may be specifically used to: determining the exploration priority of the oil and gas reservoir of the reef beach carbonate rock according to the trap level; and sequentially exploring the oil and gas reservoirs of the reef beach carbonate rock according to the exploration priority.

It should be noted that, the units, devices, or modules described in the above embodiments may be implemented by a computer chip or entity, or may be implemented by a product having a certain function. For convenience of description, the above devices are described as being functionally divided into various modules, respectively. Of course, when the present description is implemented, the functions of each module may be implemented in the same piece or pieces of software and/or hardware, or a module that implements the same function may be implemented by a plurality of sub-modules or a combination of sub-units, or the like. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

From the above, according to the trap division device for the reef beach carbonate rock provided by the embodiment of the specification, quantitative evaluation of the amount of trap data and effective division of trap grades can be realized, so that the exploration and development efficiency of the hydrocarbon reservoir of the reef beach carbonate rock can be improved.

The embodiment of the specification also provides an electronic device for trap division of reef beach carbonate rock, which comprises a processor and a memory for storing executable instructions of the processor, wherein the processor can execute the following steps according to the instructions when being specifically implemented: acquiring a top layer position value, a bottom layer position value and a porosity data body of a reef beach carbonate rock target layer; determining the trap resource amount of the reef carbonate according to the top layer position value, the bottom layer position value and the porosity data body of the reef carbonate target layer; acquiring the thickness of a cover layer, the thickness of a hydrocarbon source rock and the fracture grade of the reef beach carbonate rock trap; and dividing the trap levels according to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the mesh fracture level and the trap resource amount to obtain a plurality of trap levels.

In order to more accurately complete the above instructions, referring to fig. 5, another specific electronic device is further provided in this embodiment of the present disclosure, where the electronic device includes a network communication port 501, a processor 502, and a memory 503, and the above structures are connected by an internal cable, so that each structure may perform specific data interaction.

The network communication port 501 may be specifically configured to obtain a top layer bit value, a bottom layer bit value, and a porosity data body of a reef carbonate target layer.

The processor 502 may be specifically configured to determine the trapped resource amount of the reef carbonate according to the top layer position value, the bottom layer position value, and the porosity data body of the reef carbonate target layer; acquiring the thickness of a cover layer, the thickness of a hydrocarbon source rock and the fracture grade of the reef beach carbonate rock trap; and dividing the trap levels according to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the fracture level and the trap resource amount to obtain a plurality of trap levels.

The memory 503 may be used to store a corresponding program of instructions.

In this embodiment, the network communication port 501 may be a virtual port that binds with different communication protocols, so that different data may be sent or received. For example, the network communication port may be a port responsible for performing web data communication, a port responsible for performing FTP data communication, or a port responsible for performing mail data communication. The network communication port may also be an entity's communication interface or a communication chip. For example, it may be a wireless mobile network communication chip, such as GSM, CDMA, etc.; it may also be a Wifi chip; it may also be a bluetooth chip.

In this embodiment, the processor 502 may be implemented in any suitable manner. For example, the processor may take the form of, for example, a microprocessor or processor, and a computer-readable medium storing computer-readable program code (e.g., software or firmware) executable by the (micro) processor, logic gates, switches, an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a programmable logic controller, and an embedded microcontroller, among others. The description is not intended to be limiting.

In this embodiment, the memory 503 may include a plurality of layers, and in a digital system, the memory may be any memory as long as it can hold binary data; in an integrated circuit, a circuit with a memory function without a physical form is also called a memory, such as a RAM, a FIFO, etc.; in the system, the storage device in physical form is also called a memory, such as a memory bank, a TF card, and the like.

The embodiments of the present specification also provide a computer storage medium storing computer program instructions for a method for trap division of reef beach carbonate rock, the computer program instructions when executed implementing: acquiring a top layer position value, a bottom layer position value and a porosity data body of a reef beach carbonate rock target layer; determining the trap resource amount of the reef carbonate according to the top layer position value, the bottom layer position value and the porosity data body of the reef carbonate target layer; acquiring the thickness of a cover layer, the thickness of a hydrocarbon source rock and the fracture grade of the reef beach carbonate rock trap; and dividing the trap levels according to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the fracture level and the trap resource amount to obtain a plurality of trap levels.

In the present embodiment, the storage medium includes, but is not limited to, a random access Memory (Random Access Memory, RAM), a Read-Only Memory (ROM), a Cache (Cache), a Hard Disk (HDD), or a Memory Card (Memory Card). The memory may be used to store computer program instructions. The network communication unit may be an interface for performing network connection communication, which is set in accordance with a standard prescribed by a communication protocol.

Although the present description provides method operational steps as described in the examples or flowcharts, more or fewer operational steps may be included based on conventional or non-inventive means. The order of steps recited in the embodiments is merely one way of performing the order of steps and does not represent a unique order of execution. When implemented by an apparatus or client product in practice, the methods illustrated in the embodiments or figures may be performed sequentially or in parallel (e.g., in a parallel processor or multi-threaded processing environment, or even in a distributed data processing environment). 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, it is not excluded that additional identical or equivalent elements may be present in a process, method, article, or apparatus that comprises a described element. The terms first, second, etc. are used to denote a name, but not any particular order.

Those skilled in the art will also appreciate that, in addition to implementing the controller in a pure computer readable program code, it is well possible to implement the same functionality by logically programming the method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc. Such a controller can be regarded as a hardware component, and means for implementing various functions included therein can also be regarded as a structure within the hardware component. Or even means for achieving the various functions may be regarded as either software modules implementing the methods or structures within hardware components.

The description may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, classes, etc. that perform particular tasks or implement particular abstract data types. The specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.

From the above description of embodiments, it will be apparent to those skilled in the art that the present description may be implemented in software plus a necessary general hardware platform. Based on such understanding, the technical solutions of the present specification may be embodied essentially in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and include several instructions to cause a computer device (which may be a personal computer, a mobile terminal, a server, or a network device, etc.) to perform the methods described in the various embodiments or portions of the embodiments of the present specification.

Various embodiments in this specification are described in a progressive manner, and identical or similar parts are all provided for each embodiment, each embodiment focusing on differences from other embodiments. The specification is operational with numerous general purpose or special purpose computer system environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set top boxes, programmable electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or devices, and the like.

Although the present description has been described by way of example, it will be appreciated by those of ordinary skill in the art that there are many variations to the description without departing from the spirit of the present description, and it is intended that the appended claims encompass such variations without departing from the spirit of the present description.

Claims

1. The method for dividing the trap of the reef beach carbonate rock is characterized by comprising the following steps of:

dividing the trap levels according to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the fracture level and the trap resource amount to obtain a plurality of trap levels;

wherein, obtain the porosity data volume of reef beach carbonate bed, include:

acquiring a fitting curve of longitudinal wave impedance to porosity;

determining a porosity data body of a reef beach carbonate target layer according to the fitting curve of the longitudinal wave impedance data body and the longitudinal wave impedance-to-porosity;

Wherein, according to the top layer bit value, bottom layer bit value and the porosity data volume of reef beach carbonate target layer, confirm the resource volume of trapping of reef beach carbonate, include:

determining the trapping resource quantity of the reef beach carbonate according to the trapping longitudinal boundary, the trapping transverse boundary and the porosity data body;

the classifying the levels of the trap according to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the fracture level and the trap resource amount to obtain traps with multiple levels, including:

2. The method of claim 1, wherein the structure tensor threshold is determined as follows:

acquiring the structure tensor attribute of the reef beach carbonate rock;

acquiring a drilling time curve and an air measurement curve of a drilled well;

3. The method according to claim 2, wherein determining the contour corresponding to the structural tensor threshold of the reef beach carbonate as the trap lateral boundary of the reef beach carbonate comprises:

4. The method of claim 1, wherein the obtaining the fracture rating of the reef beach carbonate trap comprises:

5. The method of claim 1, wherein after obtaining the plurality of trap levels, further comprising:

6. The utility model provides a reef beach carbonate rock's trap division device which characterized in that includes:

the dividing module is used for dividing the trap levels according to the thickness of the cover layer, the thickness of the hydrocarbon source rock, the fracture level and the trap resource amount to obtain a plurality of trap levels;

wherein, obtain the porosity data volume of reef beach carbonate bed, include:

acquiring a fitting curve of longitudinal wave impedance to porosity;

7. A computer readable storage medium, having stored thereon computer instructions which, when executed by a processor, implement the steps of the method of any of claims 1 to 5.