CN112459766B

CN112459766B - Method and device for dividing compound oil and gas reservoirs

Info

Publication number: CN112459766B
Application number: CN201910847956.8A
Authority: CN
Inventors: 吕传炳; 黄志佳; 李昆; 付亮亮
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2023-07-25
Anticipated expiration: 2039-09-09
Also published as: CN112459766A

Abstract

The invention discloses a method and a device for dividing a compound oil-gas reservoir, and belongs to the technical field of oil-gas reservoir exploration and development. The method comprises the following steps: for a compound hydrocarbon reservoir to be partitioned, partitioning each interval comprised by the compound hydrocarbon reservoir into one or more sub-layers; for any layer section, according to the communication relation of the oil-gas-containing sand bodies in each sub-layer included in the layer section, obtaining the communication sand bodies of each sub-layer, and compiling a sand body distribution diagram based on the communication sand bodies; and obtaining a geological structure diagram of the interval, overlapping the geological structure diagram and the sand body distribution diagram to obtain an overlapping diagram, obtaining contact information of the communicated sand bodies based on the overlapping diagram, and combining the communicated sand bodies according to the contact information to obtain one or more oil and gas reservoir units so as to finish the division of the compound oil and gas reservoirs. According to the invention, the oil and gas reservoir units in the compound oil and gas reservoir are finely divided, the main reservoir forming control elements of the oil and gas reservoir can be clearly mastered according to the division result, and the exploration and development work is guided, so that more reserves are found, and the development effect of the oil and gas reservoir can be improved.

Description

Method and device for dividing compound oil and gas reservoirs

Technical Field

The invention relates to the technical field of oil and gas reservoir exploitation, in particular to a method and a device for dividing a compound oil and gas reservoir.

Background

In the exploration and development process of the compound oil and gas gathering zone, the anatomical analysis based on the oil and gas reservoir units is seldom developed for the compound oil and gas reservoir, so that geological knowledge is not deep or a misidentification zone exists. The exploration phase research object is mainly a hydrocarbon reservoir or a hydrocarbon reservoir group, and actually the combination characteristics of the compound hydrocarbon reservoir are researched. The result of this combination stack largely masks the true reservoir type, reservoir formation mechanism and enrichment laws.

In the development stage of oil and gas fields, in the traditional oilfield geological working method, oil layers and sand bodies which belong to different oil and gas reservoirs are mixed together for research, so that misjudgment of oil layer distribution and communication relation is easily caused, and development effect is influenced.

In addition, the oil and gas reservoir units are finely divided, analysis and evaluation are carried out aiming at different types of oil and gas reservoir units, the method is a basis for accurately knowing the compound oil and gas reservoirs, is a necessary way, and has important significance for deepening research on the reservoir forming rule of the compound oil and gas accumulation belt and effectively guiding exploration and development work.

Disclosure of Invention

The embodiment of the invention provides a method and a device for dividing a compound oil-gas reservoir, which can solve the problem of poor development effect of the compound oil-gas reservoir in the related technology. The technical proposal is as follows:

In one aspect, a method of partitioning a compound reservoir is provided, the method comprising:

for a compound hydrocarbon reservoir to be partitioned, partitioning each interval comprised by the compound hydrocarbon reservoir into one or more sub-layers;

according to the communication relation of the oil-gas-containing sand bodies in each sub-layer included in each interval, the communication sand bodies of each sub-layer of each interval are determined, and a sand body distribution map of each interval is generated based on each communication sand body of each interval;

determining a geological map of each of the intervals;

for each layer segment, overlapping a geological structure map and the sand body distribution map of each layer segment under the same coordinate system to obtain an overlapped map of each layer segment;

and determining contact information of each connected sand body based on the superposition graph of each layer segment, and combining each connected sand body according to the contact information to obtain one or more oil and gas reservoir units of each layer segment so as to complete the division of the compound oil and gas reservoirs.

Optionally, before dividing each interval included in the compound hydrocarbon reservoir into one or more sub-layers, the method further includes:

Determining an initial compound hydrocarbon reservoir;

and if the initial compound oil and gas reservoirs are positioned in the same geological structure unit and the ascertained reserves in the initial compound oil and gas reservoirs are not smaller than a reference threshold value, taking the initial compound oil and gas reservoirs as the compound oil and gas reservoirs to be divided.

Optionally, for the compound hydrocarbon reservoir to be divided, dividing each interval included in the compound hydrocarbon reservoir into one or more sub-layers includes:

for any layer segment, acquiring first information of the layer segment, wherein the first information comprises lithology characteristic information, unconformity surface information and special lithology information;

determining a boundary line of the secondary deposition loops and a boundary line of the tertiary deposition loops according to the first information; dividing the interval into hydrocarbon groups according to the boundary of the secondary deposition loops, and dividing the hydrocarbon groups into sandstone groups according to the boundary of the tertiary deposition loops;

acquiring second information of the interval, wherein the second information comprises logging curve characteristic information, lithology combination information and stratum thickness information; determining a quaternary deposition looping boundary according to the second information;

each sandstone group is divided into one or more sub-layers according to the four-level deposition spiral parting line.

Optionally, before determining the connected sand of each sub-layer of each interval according to the connected relation of the oil-gas-containing sand in each sub-layer included in each interval, the method further includes:

for any sub-layer, taking the sand body containing oil and gas in the sub-layer as the sand body containing oil and gas;

acquiring logging curves, single-well lithofacies section information and sediment information corresponding to the sub-layers;

determining a logging facies sign according to the logging curve and the single-well lithofacies profile information, and determining a continuous-well lithofacies profile information according to the logging facies sign and the deposition information;

and acquiring the communication relation of the oil-gas-containing sand body based on the continuous well lithofacies profile information.

Optionally, the generating a sand body distribution map of each interval based on each of the connected sand bodies of each interval includes:

acquiring the position information of the connected sand body, and generating a deposition microphase plane graph according to the position information and the deposition information;

acquiring sand thickness information from the logging curve, marking the sand thickness information on the sedimentary microphase plane graph, and determining a sand thickness contour line based on the marked sand thickness information to generate a sand plane graph;

And acquiring effective thickness information from the single-well lithofacies profile information, marking the effective thickness information on the sand body plan, determining an effective thickness contour line and a boundary line of the connected sand body based on the marked effective thickness information, and generating the sand body distribution map.

Optionally, before the contact information of the connected sand body is obtained based on the superposition graph, the method further includes:

determining whether the oil-gas-water relationship contradiction exists in the communicated sand body according to the superposition graph;

if the oil-gas-water relationship contradiction exists in the connected sand bodies, correcting the connected relation, determining corrected connected sand bodies according to the corrected connected relation, correcting the superposition graph based on the corrected connected sand bodies, and generating a corrected superposition graph;

the step of obtaining contact information of the connected sand body based on the superposition graph comprises the following steps:

and acquiring contact information of the communicated sand body based on the corrected superposition graph.

Optionally, after the communicating sand body is combined according to the contact information to obtain one or more hydrocarbon reservoir units, the method further includes:

for any reservoir unit, acquiring unit information of the reservoir unit, wherein the unit information comprises one or more of trapping conditions of the reservoir unit, reservoir types, reservoir-water interface altitude depths, reservoir average thickness, reservoir area, single reservoir coefficient and geological reserves of a corresponding single well;

And establishing an information table of the oil and gas reservoir according to the unit information, wherein the information table is used for describing the oil and gas reservoir unit.

In one aspect, there is provided a compartmentalized compound hydrocarbon reservoir device, the device comprising:

a partitioning module configured to partition each interval comprised by a complex hydrocarbon reservoir into one or more sub-layers for the complex hydrocarbon reservoir to be partitioned;

a generation module configured to determine a connected sand for each sub-layer of each of the intervals according to a connected relationship of the oil-containing sand in each sub-layer included in each of the intervals, and generate a sand profile for each of the intervals based on each of the connected sand for each of the intervals;

a determination module configured to determine a geologic structure map for each of the intervals;

the superposition module is configured to superimpose the geological structure map and the sand body distribution map under the same coordinate system to obtain a superimposed map;

and the combination module is configured to determine contact information of each connected sand body based on the superposition graph of each interval, and combine each connected sand body according to the contact information to obtain one or more reservoir units of each interval so as to complete division of the compound reservoir.

Optionally, the apparatus further includes:

and the to-be-divided oil and gas reservoir determining module is configured to acquire an initial compound oil and gas reservoir, and if the initial compound oil and gas reservoir is located in the same geological structure unit, the ascertained reserve in the initial compound oil and gas reservoir is not smaller than a reference threshold, and the initial compound oil and gas reservoir is used as the to-be-divided compound oil and gas reservoir.

Optionally, the dividing module includes:

a first acquisition sub-module configured to acquire, for any one interval, first information of the interval, the first information including lithology characteristic information, unconformity surface information, and special lithology information;

a first determining sub-module configured to determine a boundary of a second deposition curl and a third deposition curl boundary based on the first information;

a first demarcation sub-module configured to divide the interval into groups of hydrocarbon according to a demarcation of the secondary deposition convolutions, and divide the groups of hydrocarbon into groups of sandstones according to the demarcation of the tertiary deposition convolutions;

a second acquisition sub-module configured to acquire second information of the interval, the second information including log characteristic information, lithology combination information, and formation thickness information;

A second determination sub-module configured to determine a four-level deposition looping boundary based on the second information;

a second demarcation sub-module configured to divide each sandstone group into one or more sub-layers according to the four-level deposition convolution boundary.

Optionally, the apparatus further includes:

the oil-gas-containing sand body determining module is configured to take the sand body containing oil and gas in any sub-layer as the oil-gas-containing sand body;

the single-well lithofacies profile information and sediment information acquisition module is configured to acquire a logging curve, single-well lithofacies profile information and sediment information corresponding to the sub-layer;

the continuous well lithology profile information determining module is further configured to determine a logging facies sign according to the logging curve and the single well lithology profile information, and determine continuous well lithology profile information according to the logging facies sign and the deposition information;

and the communication relation acquisition module is configured to acquire the communication relation of the oil-gas-containing sand body based on the continuous well lithofacies profile information.

Optionally, the generating module includes:

the first generation sub-module is configured to acquire the position information of the communicated sand body and generate a deposition microphase plane graph according to the position information and the deposition information;

The second generation submodule is configured to acquire sand thickness information from the logging curve, mark the sand thickness information on the sedimentary micro-phase plane graph, determine a sand thickness contour line based on the marked sand thickness information and generate a sand plane graph;

and the third generation submodule is configured to acquire effective thickness information from the single-well lithofacies profile information, mark the effective thickness information on the sand body plan, determine an effective thickness contour line and the boundary line of the connected sand body based on the marked effective thickness information, and generate the sand body distribution diagram.

Optionally, the apparatus further includes:

the oil-gas-water relationship contradiction confirming module is configured to determine whether the connected sand bodies have oil-gas-water relationship contradictions according to the superposition graph;

the correction module is configured to correct the communication relation if the communication sand bodies have contradiction between oil-gas-water relation, and obtain corrected communication sand bodies according to the corrected communication relation; and correcting the superposition graph based on the corrected communication sand body, and generating a corrected superposition graph.

Optionally, the apparatus further includes:

the system comprises a reservoir unit information acquisition module, a storage unit information acquisition module and a storage unit information processing module, wherein the reservoir unit information acquisition module is configured to acquire unit information of the reservoir unit for any reservoir unit, and the unit information comprises one or more of trapping conditions of the reservoir unit, reservoir types, reservoir-water interface altitude depths, corresponding reservoir average thickness, oil area, single storage coefficient and geological reserves of a single well;

And the establishing module is configured to establish an information table of the oil and gas reservoir according to the unit information, wherein the information table is used for describing the oil and gas reservoir unit.

In one aspect, a computer device is provided that includes one or more processors and one or more memories having stored therein at least one program code loaded and executed by the one or more processors to implement a method of partitioning a multiple reservoir as described above.

In one aspect, a computer readable storage medium having stored therein at least one program code loaded and executed by a processor to implement a method of partitioning a multiple hydrocarbon reservoir as described above is provided.

In the embodiment of the invention, after the compound oil and gas reservoir to be divided is obtained, the compound oil and gas reservoir is not directly developed, but is divided into one or more sub-layers through a series of steps, and the compound oil and gas reservoir with a larger range is divided into sub-layers with a smaller range. And then acquiring the oil-gas-containing sand bodies in the sub-layers, taking the oil-gas-containing sand bodies as research objects, determining the communication relation of the oil-gas-containing sand bodies, and generating a sand body distribution map of each layer section, wherein the sand body distribution map is clearly marked with sand body numbers, the sand body thickness and the sand body effective thickness, so that operators can conveniently select different sand bodies to carry out further analysis and research. And overlapping the geological structure map and the sand body distribution map, and correcting the communicated sand bodies with communication relation recognition errors in the sand body distribution map according to geological boundary lines and oil-gas-water relations, so as to re-divide the communicated sand bodies. Based on the repartitioned connected sand bodies, a corrected superposition graph is generated, the corrected superposition graph comprises all connected sand bodies in a certain sub-layer, whether the connected sand bodies in different sub-layers are connected or not is judged according to the contact relation of the sub-layers, if so, a combined sand body is divided, and the divided combined sand body is stored as one or more oil and gas reservoir units. And selecting another interval in the compound oil and gas reservoir, and repeating the steps to finish the division of the compound oil and gas reservoir. The method for dividing the sub-layers and dividing the oil and gas reservoir units can obviously improve the fineness of division; the accuracy of division can be improved by applying various correction modes; the automation of the division can be realized by using the computer equipment, so that the division efficiency is improved; after division, different development modes can be adopted for different types of oil and gas reservoir units at different positions, and the yield is remarkably improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a method for partitioning a multiple reservoir according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method for partitioning a multiple reservoir in accordance with an embodiment of the present invention;

FIG. 3 is a schematic diagram of a deposition microphase plane in accordance with an embodiment of the present invention;

FIG. 4 is a sand distribution diagram provided by an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of a sand body profile provided by an embodiment of the present invention;

FIG. 6 is an overlay diagram provided by an embodiment of the present invention;

FIG. 7 is a modified overlay provided by an embodiment of the present invention;

FIG. 8 is a schematic diagram of a split compound hydrocarbon reservoir device according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a computer device according to an embodiment of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.

Fig. 1 is a flowchart of a method for partitioning a compound hydrocarbon reservoir according to an embodiment of the present invention, and referring to fig. 1, the method specifically includes the following steps.

Step 101, for a compound hydrocarbon reservoir to be divided, dividing each interval included in the compound hydrocarbon reservoir into one or more sub-layers.

Step 102, determining the communication sand body of each sub-layer of each interval according to the communication relation of the oil-gas-containing sand bodies in each sub-layer included in each interval, and generating a sand body distribution map of each interval based on each communication sand body of each interval.

Step 103, determining a geological structure map of each layer section.

And 104, superposing the geological structure map and the sand body distribution map of each interval in the same coordinate system for each interval to obtain a superposition map of each interval.

And 105, determining contact information of each connected sand body based on the superposition graph of each interval, and combining each connected sand body according to the contact information to obtain one or more reservoir units of each interval so as to complete the division of the compound reservoir.

In an alternative embodiment, before dividing each interval comprised by the compound hydrocarbon reservoir into one or more sub-layers, the method further comprises:

determining an initial compound hydrocarbon reservoir;

if the initial compound oil and gas reservoir is positioned in the same geological structure unit and the ascertained reserve in the initial compound oil and gas reservoir is not less than the reference threshold, the initial compound oil and gas reservoir is taken as the compound oil and gas reservoir to be divided.

In an alternative embodiment, for a multiple reservoir to be partitioned, partitioning each interval comprised by the multiple reservoir into one or more sub-layers comprises:

Determining a boundary line of the secondary deposition loops and a boundary line of the tertiary deposition loops according to the first information; dividing the interval into oil-gas layer groups according to the boundary of the secondary deposition gyratory, and dividing the oil-gas layer groups into sandstone groups according to the boundary of the tertiary deposition gyratory;

acquiring second information of the interval, wherein the second information comprises logging curve characteristic information, lithology combination information and stratum thickness information;

determining a quaternary deposition looping boundary according to the second information;

each sandstone group is divided into one or more sub-layers according to a four-level deposition-looping boundary.

In an alternative embodiment, before determining the connected sand of each sub-layer of each interval according to the connected relation of the oil-gas-containing sand in each sub-layer included in each interval, the method further comprises:

for any sub-layer, taking the sand body containing oil gas in the sub-layer as the sand body containing oil gas;

acquiring logging curves, single-well lithofacies section information and deposition information corresponding to the sub-layers;

determining a logging facies sign according to the logging curve and single-well lithofacies profile information, and determining a continuous-well lithofacies profile information according to the logging facies sign and deposition information;

In an alternative embodiment, generating a sand profile for each interval based on each connected sand for each interval includes:

acquiring position information of the connected sand body, and generating a deposition microphase plane graph according to the position information and the deposition information;

acquiring sand thickness information from a logging curve, marking the sand thickness information on a sedimentary microphase plane graph, and determining a sand thickness contour line based on the marked sand thickness information to generate a sand plane graph;

effective thickness information is obtained from single-well lithology section information, the effective thickness information is marked on a sand body plan, an effective thickness contour line and a boundary line communicated with the sand body are determined based on the marked effective thickness information, and a sand body distribution diagram is generated.

In an alternative embodiment, before the contact information of the connected sand body is acquired based on the superposition graph, the method further includes:

determining whether the oil-gas-water relationship contradiction exists in the communicated sand body according to the superposition diagram;

if the oil-gas-water relationship contradiction exists in the connected sand bodies, correcting the connected relation, determining the corrected connected sand bodies according to the corrected connected relation, correcting the superposition graph based on the corrected connected sand bodies, and generating a corrected superposition graph;

Contact information of intercommunication sand body is obtained based on coincide diagram, includes:

and acquiring contact information of the connected sand body based on the corrected superposition graph.

In an alternative embodiment, after the communicating sand body is combined to obtain one or more hydrocarbon reservoir units according to the contact information, the method further comprises:

for any oil and gas reservoir unit, acquiring unit information of the oil and gas reservoir unit, wherein the unit information comprises one or more of trapping conditions of the oil and gas reservoir unit, oil and gas reservoir type, altitude depth of an oil and gas-water interface, average thickness of an oil and gas reservoir of a corresponding single well, oil-containing area, single storage coefficient and geological reserve;

Any combination of the above optional solutions may be adopted to form an optional embodiment of the present invention, which is not described herein.

Fig. 2 is a flowchart of a method for partitioning a compound hydrocarbon reservoir according to an embodiment of the present invention, and referring to fig. 2, the method includes the following steps.

Step 201, determining an initial compound oil and gas reservoir, and if the initial compound oil and gas reservoir is located in the same geological structure unit, determining that the reserve in the initial compound oil and gas reservoir is not less than a reference threshold, and taking the initial compound oil and gas reservoir as the compound oil and gas reservoir to be divided.

The compound oil and gas reservoir can be a multi-reservoir enrichment area formed by collecting a plurality of oil and gas reservoir units which are similar in cause condition and independent in fluid system in an oil field. The reservoir unit referred to in the embodiments of the present invention may be referred to as a reservoir in petrology.

In step 201, the computer device may first obtain geological information of the initial complex reservoir, and determine the complex reservoir to be partitioned based on the geological information. The geological information may include, but is not limited to, formation composition information of the initial complex reservoir, location information of the initial complex reservoir, reserves information of the initial complex reservoir, well pattern information of the initial complex reservoir, location information of initial sand in the initial complex reservoir, hydrocarbon location information of the initial complex reservoir, and water location information of the initial complex reservoir. Geological information may be derived from logging information, well logging information, and well drilling information. The logging information can be information such as electricity, magnetism, sound, heat, nuclear and the like received by logging equipment; logging information is various acoustic, electric, magnetic, mechanical, chemical and electronic information acquired by logging equipment; the drilling information may be information fed back when the drilling equipment is in operation.

It should be noted that, in this embodiment, the various position information may be positioning information of GPS (Global Positioning System ), or three-dimensional coordinate information converted by the computer device according to the GPS information.

In one possible embodiment, the computer device obtains constraint information of the structural unit from the server, and determines that the initial complex reservoir is constraint information conforming to the structural unit based on the obtained geological information of the initial complex reservoir compared with the constraint information of the structural unit. For example, the computer device may determine whether the compound reservoir is located within the same building unit by formation composition requirements in the constraint information for the building unit. Specifically, the computer device obtains formation composition information of the initial complex hydrocarbon reservoir from geological information of the initial complex hydrocarbon reservoir, and if the formation composition information is included in the formation composition requirements, determines that the initial complex hydrocarbon reservoir is located in the same structural unit.

By taking the initial hydrocarbon reservoir in the same structural unit as a processing object, the geological boundary is not easy to judge clearly due to factors such as faults and the like, so that the division effect of the compound hydrocarbon reservoir is better.

In one possible implementation, the computer device may obtain reserve information for an initial multiple reservoir, and determine an ascertained reserve in the initial multiple reservoir based on the reserve information for the initial multiple reservoir. Comparing the ascertained reserves in the initial compound hydrocarbon reservoir with a reference reserve threshold stored in the computer device, if the ascertained reserves in the initial compound hydrocarbon reservoir are greater than the reference threshold, the initial compound hydrocarbon reservoir is taken as the compound hydrocarbon reservoir to be partitioned, and for hydrocarbon reservoirs with smaller ascertained reserves, there may be no need for partitioning, while for hydrocarbon reservoirs with larger ascertained reserves, different mining methods may be distinguished by partitioning, which may be more targeted, and an increase in production may be achieved. For example, the reference threshold may be 50 ten thousand tons, which is not limited by the embodiment of the present invention.

It should be noted that, in the embodiment of the present invention, only the geological structure and the ascertained reserves are used to define whether the initial compound reservoir is taken as the partition object for illustration, and of course, in one possible implementation, the computer device may also obtain the development pattern information of the initial compound reservoir, where the development pattern information may include, but is not limited to, the number of coring wells, water injection wells, and oil recovery wells in the development pattern. The computer device can respectively compare the number of the obtained coring wells, water injection wells and oil extraction wells in the development well pattern with the number of the coring wells, the number of the water injection wells and the number of the oil extraction wells, and if the number of the obtained coring wells, water injection wells and oil extraction wells in the development well pattern is larger than the number of the coring wells, the number of the water injection wells and the number of the oil extraction wells, the initial compound oil and gas reservoir is used as the compound oil and gas reservoir to be divided. In other implementations of the embodiment of the present invention, the above-mentioned at least one determination condition may also be applied to determine whether to use the initial compound hydrocarbon reservoir as the compound hydrocarbon reservoir to be divided, which is not limited in the embodiment of the present invention.

Step 202, dividing the compound oil-gas reservoir to be divided into a plurality of intervals.

For any complex hydrocarbon reservoir, the complex hydrocarbon reservoir comprises one or more intervals, the intervals comprise rock formations with various lithologies, such as sandstone layers, mudstone layers, and the rock formations of various rock formations can show periodic repetition phenomena as a result of crust movement and water inflow and water withdrawal, the periodically occurring phenomenon of the rock formations is called deposition rotation, and boundaries of different levels can be obtained according to deposition rotation of different levels. The boundary of the primary deposition cycle may be a boundary dividing at the boundary of the denuded plane or the deposition environment where a significant change occurs.

In one possible embodiment, the step of dividing the compound hydrocarbon reservoir to be divided into a plurality of intervals may comprise: the computer equipment obtains the coordinates of each point on the boundary rock stratum of rock strata with different lithology in the interval according to the logging information, the logging information and the drilling information, the points are connected to form the boundary rock stratum of the rock strata with different lithology, the boundary rock stratum with the longest repetition period is selected from the boundary rock strata, the boundary rock stratum with the longest repetition period is used as a primary deposition rotation boundary line, and the initial compound oil and gas reservoir is divided into intervals according to the primary deposition rotation boundary line, so that the position information of the interval is obtained.

Dividing the initial compound reservoir into intervals according to the position information of the boundary line of the first-order deposition loops, and obtaining the position information of the intervals specifically comprises the following steps: the computer device may draw a location map of the initial compound hydrocarbon reservoir on a plane based on the location information of the initial compound hydrocarbon reservoir, and draw the demarcation line of the primary deposition curl as one or more first demarcations based on the coordinate information of each point on the demarcation line of the primary deposition curl. And overlapping the position diagram of the initial compound oil and gas reservoir and one or more first dividing lines in the same coordinate system, dividing the initial compound oil and gas reservoir into a plurality of parts, and taking each part as an interval. In addition, the computer device may store the division result and generate a position map of the layer segment based on the position information of the layer segment.

Step 203, for the compound hydrocarbon reservoir to be divided, dividing each interval included in the compound hydrocarbon reservoir into one or more sub-layers.

It should be noted that, the sub-layer referred to in the embodiments of the present invention may refer to a small layer in petroleum. After the layer segments are divided, the computer device may further divide each layer segment based on the position information of the layer segments to obtain one or more sub-layers.

In one possible embodiment, for a multiple reservoir to be partitioned, each interval comprised by the multiple reservoir is partitioned into one or more sub-layers, comprising the following steps 203A to 203D:

203A, for any interval, acquiring first information of the interval, wherein the first information comprises lithology characteristic information, unconformity surface information and special lithology information.

Wherein the lithology characteristic information may include, but is not limited to, color information, composition information, and structural information of the rock; the unconformity surface refers to the fact that a continuous formation formed at a certain time in an interval is separated into two originally connected surfaces due to the interruption of the earth's crust movement, and the two surfaces are called unconformity surfaces. The non-integrated face information is information for describing the position of the non-integrated face; the special lithology information refers to the position information of some rock layers with specific lithology, such as limestone, dolomite, limestone mud, etc.

203B, determining a boundary of the secondary deposition loops and a boundary of the tertiary deposition loops according to the first information.

Wherein the boundary of the secondary deposition loops may be the boundary dividing at the boundary of the distinct water withdrawal or water ingress deposition. The tertiary depositional convolution boundary may be a depositional convolution boundary formed by several lowest order convolutions with similar properties in the same sandstone layer.

The step of determining the boundary of the second-order deposition cycle and the boundary of the third-order deposition cycle based on the first information may include: the computer equipment searches the position information of the demarcation rock stratum with obvious water withdrawal or water inflow deposition in the stratum according to the first information, and takes the rock stratum as the demarcation line of the secondary deposition gyratory; and searching the position information of the region with the most similar lithology characteristics in the interval, and taking the rock stratum with the longest repeated occurrence period in the region as a boundary line of three-level deposition loops.

203C, dividing the interval into hydrocarbon groups according to the boundary of the second-level deposition loops, and dividing the hydrocarbon groups into sandstone groups according to the boundary of the third-level deposition loops.

In one possible embodiment, the step of the computer device dividing the interval into hydrocarbon groups according to the demarcation of the second-order deposition loops may specifically comprise: the computer device may convert the demarcation line of the secondary deposition curl into one or more second demarcation lines based on the coordinate information for each point on the demarcation line of the secondary deposition curl. Overlapping the position diagram of the interval and one or more second boundary lines under the same coordinate system, dividing the interval into a plurality of parts, and taking each part as an oil-gas layer group. In addition, the computer equipment can store the division result and generate a position diagram of the oil-gas layer group according to the position information of the oil-gas layer group.

The step of dividing the hydrocarbon reservoir group into sandstone groups according to the boundary of the three-stage deposition loops may specifically include: the computer device may convert the demarcation of the tertiary deposition curl into one or more third demarcations based on the coordinate information for each point on the demarcation of the tertiary deposition curl. And overlapping the position diagram of the hydrocarbon reservoir group and one or more third dividing lines under the same coordinate system, dividing the hydrocarbon reservoir group into a plurality of parts, and taking each part as a sandstone group. In addition, the computer device may store the division result, and generate a position map of the sandstone group according to the position information of the sandstone group.

203D, obtaining second information of the interval, wherein the second information comprises logging curve characteristic information, lithology combination information and stratum thickness information.

The logging characteristic information includes, but is not limited to, slope, maximum value, extremum, curve fitting equation, second order reciprocal and the like of the logging. Lithology combination information may be sequence information of different formation combinations. The formation thickness information may be thickness information of a sandstone group in an interval.

203E, determining a four-level deposition looping boundary according to the second information.

Wherein the boundary of the four-level depositional convolutions may be the boundary of depositional convolutions of single layers of different lithologies.

The step of determining the boundary of the four-level deposition cycle based on the second information may include: and the computer equipment searches the demarcation rock stratum of different lithology monolayers in the sandstone group according to the second information and the position information of the sandstone group, and takes the demarcation rock stratum as the demarcation line of the four-level deposition loops.

203F, dividing each sandstone group into one or more sub-layers according to a four-level deposition spiral parting line.

The step of dividing each sandstone group into one or more sub-layers according to the four-level deposition spiral boundary may specifically include: the computer device may convert the demarcation of the quaternary deposition curl into one or more fourth demarcations based on the coordinate information for each point on the demarcation of the quaternary deposition curl. Overlapping the position diagram of the sandstone group and one or more fourth boundary lines under the same coordinate system, dividing the sandstone group into a plurality of parts, and taking each part as a sub-layer. In addition, the computer device may store the division result to obtain the position information of the sub-layer.

After completing step 203, the computer device may also compare the positional information of the one or more sub-layers with the coordinate positions of the secondary, tertiary, and quaternary deposition turnback boundaries, and repartition the sub-layers according to the coordinate positions of the secondary, tertiary, and quaternary deposition turnback boundaries if it is determined that the positional information of the one or more sub-layers has an overlapping portion with the coordinate positions of the secondary, tertiary, and quaternary deposition turnback boundaries until the positional information of the one or more sub-layers has no overlapping portion with the coordinate positions of the secondary, tertiary, and quaternary deposition turnback boundaries.

Step 204, regarding any sub-layer, taking the sand body containing oil gas in the sub-layer as the sand body containing oil gas.

Wherein the hydrocarbon-containing sand may comprise one or more hydrocarbon-containing initial sand. The hydrocarbon-free sand may comprise one or more initial hydrocarbon-free sand.

In one possible implementation, the computer device records the position information of the sand bodies containing oil and gas in the sub-layer according to the position information of the initial sand bodies in the initial compound oil and gas reservoir and the oil and gas position information of the initial compound oil and gas reservoir, and the position information of each sand body containing oil and gas can be numbered during recording.

Specifically, the computer equipment compares the position information of the initial sand body with the oil-gas position information of the initial compound oil-gas reservoir, if the position information is overlapped, the initial sand body is judged to be the initial sand body containing oil gas, and the position information of the initial sand body containing oil gas is recorded. Judging whether the two initial sand bodies containing oil and gas are contacted according to the position information of the initial sand bodies containing oil and gas, if so, dividing the two initial sand bodies containing oil and gas into one sand body containing oil and gas, and recording the position information of the divided sand bodies containing oil and gas.

In the embodiment of the invention, in order to obtain a better dividing effect, the number of the oil-gas-containing sand bodies contained in one sub-layer is not more than two. Specifically, the computer device may compare the position information of the oil-gas-containing sand body with the position information of the sub-layer to which the oil-gas-containing sand body belongs, determine whether only at most two oil-gas-containing sand bodies exist in each sub-layer, if more than two oil-gas-containing sand bodies exist in each sub-layer, acquire the position information of boundary lines of the oil-gas-containing sand body according to the position information of the oil-gas-containing sand bodies, and repartition the sub-layer according to the position information of the boundary lines of the oil-gas-containing sand bodies until only at most two oil-gas-containing sand bodies exist in each sub-layer.

Step 205, acquiring logging curves, single-well lithofacies section information and deposition information corresponding to the sub-layers.

The logging curve is a curve drawn according to the information fed back by the logging instrument during the downhole operation; the single-well lithofacies profile information refers to lithofacies stacking sequence information reflected by coring rock taken out from a coring well; the deposition information refers to information such as the deposition type, deposition mode and object source direction of the rock stratum.

In one possible embodiment, the computer device may calculate a log from the log information; obtaining coring well information from the development well pattern information of the initial compound oil and gas reservoir, and obtaining single-well lithofacies section information according to the coring well information; the deposition information may be derived from information stored in the server.

Step 206, determining a logging phase mark according to the logging curve and the single-well lithofacies profile information, and determining a continuous-well lithofacies profile information according to the logging phase mark and the deposition information.

The logging phase mark may refer to position information of a specific rock stratum in single-well lithofacies profile information. The continuous-well lithofacies profile information may be a combination of lithofacies stack sequence information of positions of the plurality of coring wells reflected by coring rock taken from the plurality of coring wells.

Specifically, the logging curve and the single-well lithofacies profile information can be combined, the position with the characteristic of a specific rock stratum curve in the logging curve is searched, the position information of the specific rock stratum in the single-well lithofacies profile information is obtained, the rock stratum is used as a logging facies mark, and the logging facies mark information is stored. And repeating the steps to obtain the logging phase mark information of all the coring wells in the compound oil and gas reservoir. And combining the obtained logging facies sign information of all the coring wells according to the position information thereof to determine the continuous well lithofacies profile information.

Step 207, acquiring the communication relation of the oil-gas-containing sand body based on the continuous well lithofacies profile information.

In one possible implementation, the computer device may obtain the connected relationship of the hydrocarbon-containing sand body based on the connected-well lithofacies profile information in combination with the location information of the hydrocarbon-containing sand body. Specifically, the formation profile information of the connected well and the position information of the oil-gas-containing sand bodies can be combined, whether an initial oil-gas-containing sand body in the oil-gas-containing sand bodies in the sub-layers or a rock stratum which blocks the communication of the oil-gas-containing sand bodies exists or not is judged, if the rock stratum which blocks the communication of the oil-gas-containing sand bodies exists, the oil-gas-containing sand bodies are divided again according to the rock stratum, and the communication relation of the divided oil-gas-containing sand bodies is recorded; the computer device may also determine whether a formation is present between two mutually contacting hydrocarbon-containing sand bodies that impedes the communication of the hydrocarbon-containing sand bodies, and if no formation is present that impedes the communication of the hydrocarbon-containing sand bodies, determine that the two mutually contacting hydrocarbon-containing sand bodies are in communication, and record a communication relationship of the mutually contacting and communicating hydrocarbon-containing sand bodies.

Step 208, determining the communication sand body of each sub-layer of each interval according to the communication relation of the oil-gas-containing sand bodies in each sub-layer included in each interval.

Specifically, according to the communication relation of the oil-gas-containing sand bodies, the computer equipment determines the oil-gas-containing sand bodies which are mutually communicated in one sub-layer in one layer section as one or more communication sand bodies, and determines the communication sand bodies of other sub-layers in the layer section after the communication sand bodies of one sub-layer are determined. After that, another interval is selected and the steps are repeated until the connected sand body of each sub-layer of each interval is determined.

Specifically, the step of determining interconnected hydrocarbon-containing sand within a sub-layer within an interval as one or more interconnected sand bodies based on the relationship of the interconnected hydrocarbon-containing sand bodies may comprise: the computer equipment combines the position information of the oil-gas-containing sand bodies according to the communication relation of the oil-gas-containing sand bodies to obtain the combined position information of the oil-gas-containing sand bodies, and determines the oil-gas-containing sand bodies which are mutually communicated in a sub-layer in one layer section as one or more communication sand bodies according to the combined position information of the oil-gas-containing sand bodies.

Step 209, generating a sand profile for each interval based on each connected sand for each interval.

It should be noted that the sand distribution diagram only includes the communication relationship between the oil-gas-containing sand in the same sub-layer, and does not include the communication relationship between the oil-gas-containing sand in different sub-layers. The computer equipment can draw a sand body distribution diagram on a plane according to the position information of the connected sand body, the serial number of the connected sand body, the thickness information of the sand body and the effective thickness information.

In one possible embodiment, a sand profile for each interval is generated based on each connected sand for each interval, comprising the following steps 209A through 209C:

step 209A, acquiring position information of the connected sand body, and generating a deposition microphase plane graph according to the position information and the deposition information.

Specifically, the computer equipment can combine the position information of the oil-containing gas sand bodies and the number of the oil-containing gas sand bodies contained in the communicated sand bodies to obtain the position information of the communicated sand bodies and the number thereof, draw the communicated sand bodies on a plane according to the position information of the communicated sand bodies and the number thereof, and then draw the rock stratum around the communicated sand bodies on the plane according to the deposition type and the deposition mode of the sand bodies described by the deposition information to generate a deposition microphase plane graph. The deposition microphase map may be used to reflect the distribution of connected sand bodies, and may be similar to one provided in fig. 3.

Step 209B, acquiring sand thickness information from the logging curve, marking the sand thickness information on the sedimentary microphase plane graph, and determining a sand thickness contour line based on the marked sand thickness information to generate a sand plane graph.

In one possible implementation mode, the computer equipment marks the oil-gas-containing sand body number and the communicated sand body number and the sand body thickness information at corresponding positions on the deposition microphase plane graph, connects the boundaries of sand bodies with the same thickness according to the sand body thickness information marked on the deposition microphase plane graph, determines thickness contour lines and generates a sand body plane graph. The sand body plan view may be used to reflect the boundary locations of the communicating sand bodies. The labeling is specifically in step 209C.

And 209C, acquiring effective thickness information from the single-well lithology section information, marking the effective thickness information on a sand body plan, determining an effective thickness contour line and a boundary line communicated with the sand body based on the marked effective thickness information, and generating a sand body distribution map.

Wherein the effective thickness information is information describing the thickness of the hydrocarbon reservoir in the sand.

In one possible implementation mode, the computer equipment marks the effective thickness information of the oil-gas-containing sand body at the corresponding position on the sand body plan, connects the boundaries of the oil-gas-containing sand bodies with the same effective thickness according to the effective thickness information of the oil-gas-containing sand bodies marked on the deposition micro-phase plan, determines the contour line of the effective thickness, and forms the boundary line of the communicated sand body together with the contour line of the sand body thickness, and generates a sand body distribution diagram based on the boundary line of the communicated sand body. The sand body distribution map can be used for reflecting boundary conditions of the oil-gas layer and the sand layer in the communicated sand body. The sand profile may be similar to one provided in fig. 4. The specific labeling forms of the sand body number, the sand body thickness information and the effective thickness information may be similar to the labeling form of the black circles in fig. 4 provided in the embodiment of the present invention, the left end number is the sand body number, the denominator of the right end fraction is the sand body thickness information, the numerator of the right end fraction is the effective thickness information, and the units of the sand body thickness information and the effective thickness information may be kilometers, which is not limited in the embodiment of the present invention.

Step 210, determining a geological structure map of each interval.

The geological structure diagram has contour lines, describes the height of the terrain, has geological boundaries, and can directly separate the sub-layers which are separated in space (as shown in fig. 6, the broken lines are contour lines of the original geological structure diagram, and the solid lines are geological boundaries of the original geological structure diagram).

The computer device may obtain a geologic map of the interval. Further, after the geological structure map of each interval is obtained, the computer device may further determine whether a region significantly different from the geological structure map exists in the interval according to the logging information, the logging information and the drilling information, obtain geological information of the region, correct the geological structure map, and generate a corrected geological structure map of each interval.

Step 211, for each interval, overlapping the geological structure map and the sand body distribution map of each interval under the same coordinate system to obtain an overlapped map of each interval.

The computer equipment can acquire the geological structure map and the generated sand body distribution map of each interval obtained through the steps, place the geological structure map and the generated sand body distribution map under the same coordinate system, finish the superposition process of the geological structure map and the generated sand body distribution map, and take the map after the superposition as a superposition map to obtain the superposition map of each interval.

And 212, determining whether the oil-gas-water relationship contradiction exists in the communicated sand body according to the superposition diagram.

And whether the oil-gas-water relationship contradiction exists in the communicated sand bodies is confirmed, so that the accuracy of the division of the communicated sand bodies can be further improved.

In one possible implementation, the manner of determining whether there is a contradiction between the hydrocarbon and water relationships in the connected sand body is as follows: the computer equipment judges whether the water position and the oil gas position in the communicated sand body are continuous according to the position information of the communicated sand body and by combining the water position information of the initial compound oil gas reservoir and the oil gas position information of the initial compound oil gas reservoir. If the oil-gas-water relationship contradiction exists, and if the oil-gas-water relationship contradiction does not exist, the oil-gas-water relationship contradiction exists.

And 213, if the oil-gas-water relationship contradiction exists in the connected sand bodies, correcting the connected relation, obtaining corrected connected sand bodies according to the corrected connected relation, correcting the superposition graph based on the corrected connected sand bodies, and generating a corrected superposition graph.

In one possible implementation manner, the computer device may obtain a deposition phase pattern of the oil-gas-containing sand body based on the deposition information, analyze whether the deposition phase pattern of the current connected sand body accords with the deposition phase pattern in the deposition information according to the deposition phase pattern, if not, correct the connection relation of the connected sand body according to the deposition phase pattern in the deposition information, obtain a corrected connected sand body according to the corrected connection relation, number the corrected connected sand body, obtain position information of the corrected connected sand body, correct the superposition graph based on the position information of the corrected connected sand body, and obtain the corrected superposition graph. Of course, the computer device may also acquire seismic data, combine the crust motion information and logging information contained in the acquired seismic data, determine whether the communication relationship between the communicating sand bodies is correct, and correct the communication relationship if not. The embodiment of the invention is not limited to what mode is specifically adopted for correction.

Step 214, determining contact information of each corrected connected sand body based on the corrected superposition graph.

Specifically, the computer device may bind and store the position information of the adjacent corrected connected sand bodies and the numbers of the adjacent corrected connected sand bodies, where the stored data is the contact information of the corrected connected sand bodies.

And 215, combining each communicated sand body according to the contact information to obtain one or more reservoir units of each interval so as to complete the division of the compound reservoir.

In a possible implementation manner, the computer device may determine whether the modified connected sand bodies in the different sub-layers are in contact according to the contact information, and if so, determine whether the modified connected sand bodies in the different sub-layers that are in contact with each other are connected, and the specific determination process is similar to step 207, which is not repeated herein. If the corrected connected sand bodies in the different sub-layers which are in contact with each other are judged to be connected, the corrected connected sand bodies are combined, and all the connected sand bodies in the different sub-layers are combined by adopting a similar method to obtain one or more combined sand bodies. Specifically, one or more combined sand bodies may be stored as one or more hydrocarbon reservoir units and marked in the corrected overlay. And then selecting another interval in the compound oil and gas reservoir to carry out the division of the compound oil and gas reservoir until one or more oil and gas reservoir units of each interval in the compound oil and gas reservoir are obtained, so as to complete the division of the compound oil and gas reservoir. After the division of the compound reservoir is completed, the position information of the reservoir unit can be determined according to the position relation of the connected sand bodies. The labeling effect of the reservoir unit is similar to that of fig. 7 provided by the embodiment of the present invention, and the black part in fig. 7 is the divided reservoir unit.

Step 216, for any reservoir unit, obtaining unit information of the reservoir unit, where the unit information includes one or more of trapping conditions of the reservoir unit, reservoir type, altitude depth of a reservoir interface, average thickness of a reservoir of a corresponding single well, oil area, single storage coefficient, and geological reserve.

The trapping condition of the oil and gas reservoir unit can be the type and the position of a boundary rock stratum which divides the oil and gas reservoir unit from surrounding rock strata; the reservoir type may be a type used to describe phase discrimination of the reservoir, for example, gas phase, liquid phase and gas-liquid phase, and may be derived from logging information; the oil-gas-water interface elevation depth can be described in combination with the oil-gas position information of the initial complex oil-gas reservoir and the water-level position information of the initial complex oil-gas reservoir; the average thickness of the oil-gas layer of the single well corresponding to the oil-gas reservoir unit can be obtained by the effective thickness information; the oil-containing area can be calculated according to the position information of the oil and gas reservoir unit; the single reservoir coefficient can be calculated according to the oil-containing area, the average thickness of the hydrocarbon reservoir of the single well and the average density of the hydrocarbon reservoir.

And step 217, establishing an information table of the oil and gas reservoir according to the unit information, wherein the information table is used for describing the oil and gas reservoir unit.

The information table of the oil and gas reservoir comprises unit information of a plurality of oil and gas reservoir units, and after the information table is established, the computer equipment can store the information table for reference in the subsequent design of a mining scheme.

Fig. 8 is a schematic structural diagram of a device for dividing a compound hydrocarbon reservoir according to an embodiment of the present invention, and referring to fig. 8, the structure of the device specifically includes the following devices.

A partitioning module 801 configured to partition each interval comprised by the multiple reservoir into one or more sub-layers for the multiple reservoir to be partitioned;

a generation module 802 configured to determine a connected sand for each sub-layer of each interval based on a connected relationship of the hydrocarbon-containing sand in each sub-layer included in each interval, and generate a sand profile for each interval based on each connected sand for each interval;

a determination module 803 configured to determine a geologic structure map for each interval;

a superposition module 804 configured to superimpose the geological structure map and the sand body distribution map under the same coordinate system to obtain a superimposed map;

the combination module 805 is configured to determine contact information of each connected sand body based on the superposition graph of each interval, and combine each connected sand body according to the contact information to obtain one or more reservoir units of each interval, so as to complete division of the compound reservoir.

Optionally, the apparatus further comprises:

the to-be-divided oil and gas reservoir determining module is configured to acquire an initial compound oil and gas reservoir, and if the initial compound oil and gas reservoir is located in the same geological structure unit and the ascertained reserve in the initial compound oil and gas reservoir is not less than a reference threshold, the initial compound oil and gas reservoir is taken as the to-be-divided compound oil and gas reservoir.

Optionally, the dividing module includes:

the first acquisition submodule is configured to acquire first information of any layer segment, wherein the first information comprises lithology characteristic information, unconformity surface information and special lithology information;

a first determining sub-module configured to determine a boundary of the second deposition curl and a boundary of the third deposition curl based on the first information;

the first dividing sub-module is configured to divide the layer section into oil-gas layer groups according to the boundary of the secondary deposition loops and divide the oil-gas layer groups into sandstone groups according to the boundary of the tertiary deposition loops;

the second acquisition sub-module is configured to acquire second information of the interval, wherein the second information comprises logging curve characteristic information, lithology combination information and stratum thickness information;

a second determining sub-module configured to determine a four-level deposition looping boundary based on the second information;

a second demarcation sub-module configured to divide each sandstone group into one or more sub-layers according to a four-level deposition convolution boundary.

Optionally, the apparatus further comprises:

the oil-gas-containing sand body determining module is configured to take the sand body containing oil gas in any sub-layer as the oil-gas-containing sand body;

the continuous well lithology profile information determining module is further configured to determine a well logging facies sign according to the well logging curve and the single well lithology profile information, and determine continuous well lithology profile information according to the well logging facies sign and the deposition information;

Optionally, the generating module includes:

the first generation submodule is configured to acquire position information of the connected sand body and generate a deposition microphase plane graph according to the position information and the deposition information;

the second generation submodule is configured to acquire sand thickness information from a logging curve, mark the sand thickness information on the sedimentary microphase plane graph, determine a sand thickness contour line based on the marked sand thickness information and generate a sand plane graph;

and the third generation submodule is configured to acquire effective thickness information from single-well lithofacies profile information, mark the effective thickness information on a sand body plan, determine an effective thickness contour line and a boundary line communicated with the sand body based on the marked effective thickness information and generate a sand body distribution diagram.

Optionally, the apparatus further comprises:

the oil-gas-water relationship contradiction confirming module is configured to determine whether the oil-gas-water relationship contradiction exists in the communicated sand body according to the superposition diagram;

the correction module is configured to correct the communication relation if the communication sand bodies have contradiction between oil-gas-water relation, and obtain corrected communication sand bodies according to the corrected communication relation; and correcting the superposition graph based on the corrected communicated sand body, and generating the corrected superposition graph.

Optionally, the apparatus further comprises:

the system comprises a hydrocarbon reservoir unit information acquisition module, a control module and a control module, wherein the hydrocarbon reservoir unit information acquisition module is configured to acquire unit information of a hydrocarbon reservoir unit for any hydrocarbon reservoir unit, and the unit information comprises one or more of trapping conditions of the hydrocarbon reservoir unit, hydrocarbon reservoir types, altitude depths of hydrocarbon-water interfaces, average hydrocarbon reservoir thickness of a corresponding single well, oil-bearing area, single storage coefficient and geological reserves;

The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.

The following are to be described: in the dividing compound oil-gas reservoir device provided in the above embodiment, only the division of the above functional modules is used for illustration, and in practical application, the above functional allocation may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to perform all or part of the functions described above.

Fig. 9 is a schematic structural diagram of a computer device according to an embodiment of the present invention, where the computer device 900 may have a relatively large difference due to different configurations or performances, and may include one or more processors (central processing units, CPU) 901 and one or more memories 902, where at least one instruction is stored in the memories 902, and the at least one instruction is loaded and executed by the processors 901 to implement the data updating method provided in the foregoing method embodiments. Of course, the computer device may also have a wired or wireless network interface, a keyboard, an input/output interface, and other components for implementing the functions of the device, which are not described herein.

In an exemplary embodiment, a computer device readable storage medium, such as a memory comprising instructions executable by a processor in a terminal or a server to perform the data updating method in the above-described embodiment, is also provided. For example, the computer device readable storage medium may be Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), compact disk Read-Only Memory (CD-ROM), magnetic tape, floppy disk, optical data storage device, etc.

In embodiments of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of features in what is being indicated.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. A method of partitioning a compound hydrocarbon reservoir, the method comprising:

According to the communication relation of the oil-gas-containing sand bodies in each sub-layer included in each layer section, determining the communication sand bodies of each sub-layer of each layer section;

generating a sand profile for each of the intervals based on each of the connected sand for each of the intervals;

determining a geological map of each of the intervals;

determining contact information of each connected sand body based on the superposition graph of each layer segment;

and combining each communicated sand body according to the contact information to obtain one or more oil and gas reservoir units of each layer section so as to complete the division of the compound oil and gas reservoirs.

2. The method of claim 1, wherein prior to dividing each interval comprised by the compound hydrocarbon reservoir into one or more sub-layers, the method further comprises:

determining an initial compound hydrocarbon reservoir;

3. The method of claim 1, wherein for a compound hydrocarbon reservoir to be partitioned, partitioning each interval included in the compound hydrocarbon reservoir into one or more sub-layers comprises:

for any layer segment, acquiring first information of the layer segment, wherein the first information comprises lithology characteristic information, unconformity surface information and special lithology information, and the special lithology information refers to position information of some rock layers with specific lithology;

determining a boundary line of the secondary deposition loops and a boundary line of the tertiary deposition loops according to the first information;

dividing the interval into hydrocarbon groups according to the boundary of the secondary deposition loops, and dividing the hydrocarbon groups into sandstone groups according to the boundary of the tertiary deposition loops;

4. The method of claim 1, wherein prior to determining the connected sand for each sub-layer of each interval based on the connected relationship of the oil and gas containing sand in each sub-layer included in each interval, the method further comprises:

5. The method of claim 4, wherein the generating a sand profile for each of the intervals based on each of the connected sand for each of the intervals comprises:

6. The method of any one of claims 1-5, wherein prior to determining contact information for each of the connected sand bodies based on the overlay of each of the intervals, the method further comprises:

the step of determining contact information of each connected sand body based on the superposition graph of each layer segment comprises the following steps:

and determining contact information of each corrected communicated sand body based on the corrected superposition graph.

7. The method of any one of claims 1-5, wherein after combining each of the connected sand bodies according to the contact information to obtain one or more reservoir units for each of the intervals, the method further comprises:

8. An apparatus for partitioning a compound hydrocarbon reservoir, the apparatus comprising:

9. The apparatus of claim 8, wherein the apparatus further comprises:

a reservoir acquisition module configured to acquire an initial duplex reservoir;

and the to-be-divided oil and gas reservoir determining module is used for taking the initial compound oil and gas reservoir as the to-be-divided compound oil and gas reservoir if the initial compound oil and gas reservoir is positioned in the same geological structure unit and the ascertained reserve in the initial compound oil and gas reservoir is not less than a reference threshold value.

10. The apparatus of claim 8, wherein the partitioning module comprises:

a first acquisition sub-module configured to acquire, for any interval, first information of the interval, the first information including lithology characteristic information, unconformity surface information, and special lithology information, wherein the special lithology information refers to position information of some rock layers with specific lithology;