CN116184526A - Qualitative characterization method, device, medium and equipment for river channel sand connectivity - Google Patents
Qualitative characterization method, device, medium and equipment for river channel sand connectivity Download PDFInfo
- Publication number
- CN116184526A CN116184526A CN202310124152.1A CN202310124152A CN116184526A CN 116184526 A CN116184526 A CN 116184526A CN 202310124152 A CN202310124152 A CN 202310124152A CN 116184526 A CN116184526 A CN 116184526A
- Authority
- CN
- China
- Prior art keywords
- sand body
- longitudinal
- curved
- river
- connectivity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/40—Controlling or monitoring, e.g. of flood or hurricane; Forecasting, e.g. risk assessment or mapping
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention relates to a qualitative characterization method, a device, a medium and equipment for river sand connectivity, wherein the method comprises the following steps: tracking and explaining the top and bottom interfaces of the compound sand body of the curved stream river by utilizing three-dimensional seismic data and well-seismic combination; acquiring a deposition interface when longitudinal periods in the compound sand body of the curved stream are equal based on the top and bottom interfaces of the compound sand body of the curved stream and the three-dimensional seismic data; acquiring sensitive seismic attributes of an interval interlayer in the longitudinal period of the compound sand body of the curved stream based on the equal deposition interface and the three-dimensional seismic data of the longitudinal period of the compound sand body of the curved stream; acquiring the sensitive seismic attribute change rate of the longitudinal secondary reservoirs in the compound sand body of the curved stream based on the top and bottom interfaces of the compound sand body of the curved stream and the three-dimensional seismic data; and qualitatively characterizing the connectivity of the river channel sand body of the curved flow river based on the longitudinal interval interlayer sensitive seismic attribute and the longitudinal reservoir sensitive seismic attribute change rate of each period in the composite sand body of the curved flow river.
Description
Technical Field
The invention relates to a qualitative characterization method, a device, a medium and equipment for river sand connectivity, and belongs to the technical field of offshore oilfield development geological research.
Background
The connectivity of the reservoir sand body generally refers to the mode and degree of mutual contact and communication of the unit sand bodies in the vertical direction and the lateral direction, and is an important factor influencing the development of the oil and gas field, and directly influencing the deployment of a flooding well pattern, the selection of a development mode, the mining of residual oil in the later period and the like in the development process of the oil and gas field. However, due to the fact that the sand bodies of the underground reservoir are high in general heterogeneity, particularly river-phase sand bodies, the sand bodies in each period are mutually cut and overlapped due to the fact that river channels are frequently changed, communication conditions of the sand bodies in each river channel are quite complex, and the sand body connectivity prediction is often difficult.
The existing sand body connectivity analysis method is mainly based on comprehensive analysis of sand body deposition types, development degrees, scales and phase change contact relations, and is combined with geological modeling, well injection and production quantity relation development and the like to judge the communication condition among various sand bodies, but the methods are large in workload and long in time consumption. In addition, the prior art is mainly based on the underground well pattern data to carry out relevant analysis, and the richness of basic data also influences the analysis result of communication between sand bodies to a certain extent. However, under the condition of a marine oil-gas field well pattern (the well spacing is generally larger than 1000m in the early days, and the local area in the middle and later stages can reach 200-500 m), the precision of offshore development is difficult to meet by utilizing the existing reservoir sand connectivity analysis technology. Therefore, a qualitative characterization method for river channel sand connectivity relative to isochronous sediment interface constraint needs to be established.
Disclosure of Invention
Aiming at the technical problems, the invention provides a qualitative characterization method, a device, a medium and equipment for river channel sand connectivity, which fully utilizes three-dimensional seismic data and drilled data to develop qualitative characterization of the river channel sand connectivity of the curved stream, overcomes the defect that a reservoir connectivity analysis method is developed mainly by well information under the offshore sparse well pattern condition, effectively reduces uncertainty of reservoir connectivity prediction, and improves prediction efficiency of reservoir connectivity.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a qualitative characterization method for river sand connectivity comprises the following steps:
tracking and explaining the top and bottom interfaces of the compound sand body of the curved stream river by utilizing the three-dimensional seismic data and combining geological data and logging data;
acquiring a deposition interface when longitudinal periods in the compound sand body of the curved stream are equal based on the top and bottom interfaces of the compound sand body of the curved stream and the three-dimensional seismic data;
acquiring sensitive seismic attributes of an interval interlayer in the longitudinal period of the compound sand body of the curved stream based on the equal deposition interface and the three-dimensional seismic data of the longitudinal period of the compound sand body of the curved stream;
acquiring the sensitive seismic attribute change rate of the longitudinal secondary reservoirs in the compound sand body of the curved stream based on the top and bottom interfaces of the compound sand body of the curved stream and the three-dimensional seismic data;
and qualitatively characterizing the connectivity of the river channel sand body of the curved flow river based on the longitudinal interval interlayer sensitive seismic attribute and the longitudinal reservoir sensitive seismic attribute change rate of each period in the composite sand body of the curved flow river.
In the qualitative characterization method of river channel sand connectivity, preferably, a deposition interface when longitudinal periods in the compound sand body of the curved stream are equal is obtained based on top and bottom interfaces of the compound sand body of the curved stream and three-dimensional seismic data, and the method specifically comprises the following steps:
step A1: selecting a typical well, performing wavelet transformation on a GR curve, performing single well and Lian Jing layer sequence analysis according to curve characteristics, and obtaining an initial uphole relative isochronous deposition interface
Step A2: taking the top and bottom interfaces of the track-explained compound sand body of the curved stream as constraints, and manufacturing equal-proportion stratum slices based on three-dimensional seismic data;
step A3: combining stratum equal proportion slices by adopting a slice deduction analysis technology based on the sedimentary geological features and combined with an initial uphole relative isochronous sedimentary interface to obtain an initial relative isochronous sedimentary interface;
step A4: based on the three-dimensional seismic data, taking the initial relative isochronous deposit interface as constraint, carrying out well-seismic interaction, optimizing the relative isochronous deposit interface, and obtaining the final equal-time deposit interface in the longitudinal period of the composite sand body of the curved stream.
In the qualitative characterization method of river channel sand connectivity, preferably, based on the deposition interface and three-dimensional seismic data when the longitudinal periods of the inside of the compound sand body of the curved stream are equal, the sensitive seismic attribute of the interlayer of the longitudinal period of the inside of the compound sand body of the curved stream is obtained, and the method specifically comprises the following steps:
step B1: b, extracting seismic attributes representing the interlayer based on three-dimensional seismic data according to the equal deposition interface of the longitudinal periods in the composite sand body of the curvelet obtained in the step A4;
step B2: based on the equal deposition interface and the tracking and interpretation of the top and bottom interfaces of the composite sand body in the longitudinal period of the composite sand body of the curtret, carrying out well shock interaction, and counting the thickness of the real well drilling interlayer;
step B3: and performing correlation analysis on the seismic attribute and the thickness of the interlayer, selecting sensitive seismic attribute of the interlayer, and calibrating and classifying the attribute by combining the thickness of the real well drilling interlayer.
The qualitative characterization method of river channel sand connectivity preferably obtains the sensitive seismic attribute change rate of reservoirs in longitudinal each period in the compound sand body of the curved stream based on the top and bottom interfaces of the compound sand body of the curved stream and three-dimensional seismic data, and specifically comprises the following steps:
step C1: respectively extracting longitudinal secondary seismic attributes of the compound sand body of the curved flow river by taking a time window of a tracking and explaining equal deposition interface of the top and bottom interfaces of the compound sand body and the longitudinal secondary of the compound sand body of the curved flow river;
step C2: taking a tracking and explaining composite sand body top interface and a deposition interface when longitudinal periods in the composite sand body of the curtreta as constraints, and counting the thickness of the actual drilling sand body of each longitudinal period in the composite sand body of the curtreta;
step C3: performing correlation analysis on the longitudinal secondary seismic attributes in the curved-flow-river composite sand body and the thickness of the real drilling sand body, and selecting the longitudinal secondary reservoir sensitive seismic attributes in the curved-flow-river composite sand body;
step C4: and (3) solving the maximum curvature of the sensitive seismic attribute of the reservoir in each longitudinal period in the compound sand body of the curved flow and obtaining the change rate of the sensitive seismic attribute of the reservoir in each longitudinal period in the compound sand body of the curved flow.
The qualitative characterization method of river channel sand connectivity preferably performs qualitative characterization on the river channel sand connectivity of the curved stream based on the longitudinal interval interlayer sensitive seismic attribute in the compound sand of the curved stream and the change rate of the longitudinal reservoir sensitive seismic attribute in each period in the compound sand of the curved stream, and specifically comprises the following steps:
step D1: grading the connectivity among the river sand bodies in each longitudinal stage of the first-level curved-stream composite sand body according to the thickness of the real drilling interlayer obtained in the step B2 and the sensitive seismic attribute of the interlayer selected in the step B3, so as to obtain the connectivity boundaries of the river sand bodies in different levels;
step D2: c4, linearly characterizing the change rate of the sensitive seismic attribute of the longitudinal secondary reservoir in each period in the compound sand body of the curved-flow river obtained in the step C, and obtaining an initial reservoir configuration boundary;
step D3: d2, according to the initial reservoir configuration boundary obtained in the step, combining the river channel sand body superposition patterns to obtain different types of configuration boundaries inside the longitudinal stages of the composite sand body of the curved stream river;
step D4: and carrying out qualitative analysis on boundary connectivity of different types of configurations by combining production dynamic characteristics to obtain a qualitative characterization result of the river sand connectivity in the advanced composite river SQ 2.
In the qualitative characterization method for river sand connectivity, preferably, the three-dimensional seismic data comprises: post-stack seismic data, seismic velocity volumes.
In the qualitative characterization method for river sand connectivity, preferably, geological data comprises: drilling data, logging data, core data, and geologic layering; the logging data includes: logging curves and logging interpretation results.
The second aspect of the invention provides a qualitative characterization device for river sand connectivity, comprising:
the first processing unit is used for tracking and explaining the top and bottom interfaces of the compound sand body of the curved stream by utilizing the three-dimensional seismic data and combining geological data and logging data;
the second processing unit is used for acquiring an equal sedimentation interface in the longitudinal period of the compound sand body of the curved stream based on the top and bottom interfaces of the compound sand body of the curved stream and the three-dimensional seismic data;
the third processing unit is used for acquiring the sensitive seismic attribute of the interval interlayer of the longitudinal period inside the compound sand body of the curved stream based on the equal deposition interface of the longitudinal period inside the compound sand body of the curved stream and the three-dimensional seismic data;
the fourth processing unit is used for acquiring the longitudinal secondary reservoir sensitive seismic attribute change rate in the compound sand body of the curved stream based on the top and bottom interfaces of the compound sand body of the curved stream and the three-dimensional seismic data;
and the fifth processing unit is used for qualitatively characterizing the connectivity of the river channel sand body of the curved stream based on the change rate of the longitudinal interval interlayer sensitive seismic attribute in the compound sand body of the curved stream and the longitudinal reservoir sensitive seismic attribute in each period in the compound sand body of the curved stream.
A third aspect of the present invention provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of the river channel sand connectivity qualitative characterization method described above.
The fourth aspect of the invention provides a computer device, comprising a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of the qualitative characterization method for river sand connectivity.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. according to the invention, a research thought of analytic hierarchy process is adopted, and firstly, through determining relative isochronous deposition interfaces, interlayer plane spreading is implemented, so that reservoir connectivity analysis of a first hierarchy is completed; and combining the information of the amplitude change rate of the seismic sensitive attribute of the reservoir, the configuration of the well-drilled reservoir and the like to complete the reservoir connectivity analysis of the second level. The method is suitable for the deposition rule of complex internal configuration orders of the river facies reservoir, and improves the accuracy of qualitative characterization of reservoir connectivity.
2. According to the method, the analysis method of well-seismic combination is adopted, the qualitative characterization of reservoir connectivity is restrained by fully utilizing abundant three-dimensional seismic information, the defect that the reservoir connectivity analysis method is developed mainly by well information under the offshore sparse well pattern condition is overcome, the uncertainty of reservoir connectivity prediction is effectively reduced, and the prediction efficiency of reservoir connectivity is improved.
3. The invention discloses a qualitative characterization method for river channel sand connectivity, which utilizes 90-degree three-dimensional seismic data, well vibration combination, tracking and explaining the top and bottom interfaces of a compound sand body of a curved stream, and obtains a deposition interface when longitudinal periods in the compound sand body of the curved stream are equal in time by adopting a stratum equal proportion slice deduction method through well vibration interaction. On the basis, the analysis is comprehensively considered in combination with the interlayer sensitive seismic attribute, the amplitude change rate of the reservoir seismic sensitive attribute, the drilled reservoir configuration and the like, so that qualitative characterization is carried out on the sand connectivity of the curved stream river channel, further the analysis of the sand connectivity of the reservoir is guided, the well pattern is optimized and developed, and important technical support is provided for efficient development and scheme adjustment of the underground oil and gas reservoir.
Drawings
FIG. 1 is a flow chart of a qualitative characterization method for river course sand connectivity provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a top and bottom interface of a composite sand body based on three-dimensional seismic data trace interpretation provided by this embodiment of the invention;
FIG. 3 is a schematic illustration of a well-shock interaction determination of longitudinally opposite equi-time sedimentary interfaces within a composite sand body provided in accordance with an embodiment of the present invention;
FIG. 4a is a schematic view of a sedimentary interface constraint when the composite sand bodies provided by the embodiment of the invention are longitudinally opposite, a sensitive seismic attribute of the interlayer is obtained based on three-dimensional seismic data, and FIG. 4b is a schematic view of a sensitive seismic attribute classification of the interlayer;
FIG. 5a is a schematic view of the late sensitivity attribute of the obtained composite sand body, and FIG. 5b is a schematic view of the change rate of the seismic attribute, wherein the schematic view is provided by the embodiment of the invention, and the constraint is provided by the top interface and the relative isochronous sediment interface of the composite sand body of the lake bottom fan;
FIG. 6a is a schematic view of a seismic reflection signature classified as a compartment sensitive seismic attribute provided by this embodiment of the invention, and FIG. 6b is a partially enlarged schematic view of FIG. 6 a;
FIG. 7 is a schematic diagram of a composite sand body late river channel initial reservoir configuration boundary provided by an embodiment of the invention;
fig. 8 is a schematic diagram of classification of a boundary of a late stage composite sand reservoir configuration of a curved stream river 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 technical solutions in the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but 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.
Aiming at the problems that the traditional sand body connectivity analysis method is mainly based on comprehensive analysis of sand body deposition types, development degrees, scales and phase change contact relations, and is combined with geologic modeling, well injection and production relation development and the like to judge the communication condition among various sand bodies, but the methods tend to have large workload and long time consumption, the invention provides a river channel sand body connectivity qualitative characterization method.
As shown in FIG. 1, the qualitative characterization method of the river sand connectivity, provided by the invention, comprises the following steps:
step A: utilizing three-dimensional seismic data and combining geological data and logging data, and sectioning and flattening interactive tracking to explain a top and bottom interface of the compound sand body of the curved river; as can be seen from FIG. 2, the object-deposit sand body top and bottom interfaces are tracked and explained based on three-dimensional seismic data.
And (B) step (B): the method comprises the following specific steps of obtaining a deposition interface when the longitudinal periods of the inside of the compound sand body of the curved stream are equal by utilizing three-dimensional seismic data and the top and bottom interfaces of the compound sand body of the curved stream:
step B1: selecting a typical well, performing wavelet transformation on a GR (gamma) curve, and performing single well and Lian Jing layer sequence analysis according to curve characteristics to obtain an initial uphole relative isochronous deposition interface;
step B2: the method comprises the steps of (1) taking the top and bottom interfaces of a curved-flow river composite sand body which are tracked and explained as constraints, and manufacturing stratum equal proportion slices based on three-dimensional seismic data;
step B3: combining the initial uphole relative isochronous deposition interface, and combining stratum equal proportion slices by adopting a slice deduction analysis technology (prior art) based on the deposition geological characteristics to obtain the initial relative isochronous deposition interface;
step B4: and (3) taking the initial relative isochronous sediment interface as a constraint, optimizing the initial relative isochronous sediment interface based on three-dimensional seismic data and well seismic interaction (comprehensive analysis of typical well and well-crossing seismic profile), and obtaining the final equal sediment interface in the longitudinal period of the compound sand body of the curvelet.
As can be seen from fig. 3, the target depositions are divided into SQ1 and SQ2 two-stage composite river channels by the opposite isochronous deposition interface.
Step C: based on the equal deposition interface and the three-dimensional seismic data of the longitudinal interval of the inside of the compound sand body of the curvelet, the sensitive seismic attribute of the interval interlayer of the longitudinal interval of the inside of the compound sand body of the curvelet is obtained, and the specific steps are as follows:
step C1: taking the deposition interface of the equal longitudinal time interval in the compound sand body of the curvelet obtained in the step B4 as constraint, selecting proper time windows from top to bottom, and extracting the seismic attribute (the seismic attribute comprises root mean square, maximum amplitude, total positive amplitude and arc length) representing the interlayer based on three-dimensional seismic data;
step C2: taking a tracking and explaining composite sand body top interface, a bottom interface and a relative equal time deposition interface as constraints, and counting the thickness of a real drilling interlayer;
step C3: performing correlation analysis on the seismic attribute extracted by SQ2 and the thickness of the interlayer, optimizing the sensitive seismic attribute of the reservoir, and calibrating and classifying the attribute by combining the thickness of the real-drilling interlayer;
as can be seen from fig. 4a, the SQ2 interlayer is mainly distributed on the east and west sides, and the middle interlayer develops less; as can be seen from FIG. 4b, the sensitivity of the interlayer can be classified into three types, i, ii, and iii, wherein the thickness of the interlayer of type I is greater than 6m; the thickness of the II type interlayer is 0-6 m; the thickness of the III class interlayer is 0m.
Step D: based on the top and bottom interfaces of the compound sand body of the curved stream and the three-dimensional seismic data, the sensitive seismic attribute change rate of the longitudinal secondary reservoirs in each period in the compound sand body of the curved stream is obtained, and the method comprises the following specific steps:
step D1: the top and bottom interfaces and the opposite equal time sedimentation interfaces of the compound sand body which are tracked and interpreted by the advanced compound river SQ2 are used as time windows to extract seismic attributes;
step D2: taking a composite sand body top interface and a relative equal time sedimentation interface which are tracked and interpreted by the advanced composite river SQ2 as constraints, and counting the thickness of the real drilling sand body;
step D3: performing correlation analysis on the seismic attribute and the sand thickness extracted by the advanced composite river SQ2, and optimizing the sensitive seismic attribute of the reservoir;
step D4: and obtaining the maximum curvature of the sensitive seismic attribute of the reservoir of the advanced composite river SQ2, and obtaining the change rate of the sensitive seismic attribute of the reservoir. And obtaining the maximum curvature attribute of the seismic amplitude to obtain the seismic attribute change rate.
As can be seen from fig. 5a and 5b, the advanced composite river SQ2 reservoir is distributed in the north-south direction as a whole, and the interior is represented by the superposition of multiple river channels.
Step E: the qualitative characterization of the river channel sand connectivity of the curvelet comprises the following steps:
step E1: the first layer is characterized by qualitative connectivity among river channel sand bodies in each period in the longitudinal direction of the compound sand bodies of the curved stream. Based on the thickness of the real well drilling interlayer and the sensitive seismic attribute classification of the interlayer, the connectivity among river channel sand bodies in each longitudinal period of the compound sand body of the curved stream river is classified, and the connectivity boundaries of river channel sand bodies in different levels are obtained.
As can be seen from fig. 6a, the connectivity between river sand bodies in the first layer, i.e. the longitudinal periods of the inside of the compound sand body of the curved-flow river, can be initially divided into three types, wherein, the type i is that the thickness of the interlayer is greater than 6m, the blocking performance to the sand body is strongest, and the longitudinal river sand bodies are not communicated; the class II is that the thickness of the interlayer is smaller and is between 0 and 6m, the interlayer has certain plugging property on the sand body, and the connectivity of the sand body of the longitudinal river channel is poor; class III is that the interlayer does not develop, and the connectivity of the longitudinal river sand body is good.
Step E2: and the second level, namely qualitative characterization of the river sand connectivity in the advanced composite river SQ 2. Performing linear characterization on the change rate of the sensitive seismic attribute of the reservoir to obtain an initial reservoir configuration boundary;
as can be seen from fig. 7, the initial reservoir configuration boundaries of the advanced composite river SQ2 are spread in the near north-south, east-west, and north-west-south directions.
Step E3: classifying the initial reservoir configuration boundaries according to the river channel sand body contact relationship to obtain different types of configuration boundaries.
Step E4: and combining production dynamic characteristics (specifically comprising a water injection well water injection section, an oil production well liquid production section and an oil production section), analyzing injection and production effects by combining the three, and further qualitatively analyzing connectivity between the injection and production well and the oil production well), and qualitatively analyzing connectivity of boundaries of different types of configurations to obtain a qualitative characterization result of connectivity of river sand in the advanced composite river SQ 2.
As can be seen from FIG. 8, the internal river channel sand connectivity of the advanced composite river channel SQ2 can be divided into three types, namely, good I-connectivity (cut-and-pile type between sand bodies), good II-connectivity (side-pile type between sand bodies) and poor III-connectivity (isolated type between sand bodies).
The second aspect of the invention provides a qualitative characterization device for river sand connectivity, comprising:
the first processing unit is used for tracking and explaining the top and bottom interfaces of the compound sand body of the curved stream by utilizing the three-dimensional seismic data and combining geological data and logging data;
the second processing unit is used for acquiring an equal sedimentation interface in the longitudinal period of the compound sand body of the curved stream based on the top and bottom interfaces of the compound sand body of the curved stream and the three-dimensional seismic data;
the third processing unit is used for acquiring the sensitive seismic attribute of the interval interlayer of the longitudinal period inside the compound sand body of the curved stream based on the equal deposition interface of the longitudinal period inside the compound sand body of the curved stream and the three-dimensional seismic data;
the fourth processing unit is used for acquiring the longitudinal secondary reservoir sensitive seismic attribute change rate in the compound sand body of the curved stream based on the top and bottom interfaces of the compound sand body of the curved stream and the three-dimensional seismic data;
and the fifth processing unit is used for qualitatively characterizing the connectivity of the river channel sand body of the curved stream based on the change rate of the longitudinal interval interlayer sensitive seismic attribute in the compound sand body of the curved stream and the longitudinal reservoir sensitive seismic attribute in each period in the compound sand body of the curved stream.
A third aspect of the present invention provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of the river channel sand connectivity qualitative characterization method described above.
The fourth aspect of the invention provides a computer device, comprising a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of the qualitative characterization method for river sand connectivity.
The present invention is described in terms of flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments. It will be understood that each flowchart and/or block of the flowchart illustrations and/or block diagrams, and combinations of flowcharts and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The qualitative characterization method for the connectivity of the river sand body is characterized by comprising the following steps of:
tracking and explaining the top and bottom interfaces of the compound sand body of the curved stream river by utilizing the three-dimensional seismic data and combining geological data and logging data;
acquiring a deposition interface when longitudinal periods in the compound sand body of the curved stream are equal based on the top and bottom interfaces of the compound sand body of the curved stream and the three-dimensional seismic data;
acquiring sensitive seismic attributes of an interval interlayer in the longitudinal period of the compound sand body of the curved stream based on the equal deposition interface and the three-dimensional seismic data of the longitudinal period of the compound sand body of the curved stream;
acquiring the sensitive seismic attribute change rate of the longitudinal secondary reservoirs in the compound sand body of the curved stream based on the top and bottom interfaces of the compound sand body of the curved stream and the three-dimensional seismic data;
and qualitatively characterizing the connectivity of the river channel sand body of the curved flow river based on the longitudinal interval interlayer sensitive seismic attribute and the longitudinal reservoir sensitive seismic attribute change rate of each period in the composite sand body of the curved flow river.
2. The qualitative characterization method for river channel sand connectivity according to claim 1, wherein the method for acquiring the deposition interface when the longitudinal periods of the inside of the composite sand body of the curved stream are equal based on the top and bottom interfaces of the composite sand body of the curved stream and three-dimensional seismic data comprises the following steps:
step A1: selecting a typical well, performing wavelet transformation on a GR curve, performing single well and Lian Jing layer sequence analysis according to curve characteristics, and obtaining an initial uphole relative isochronous deposition interface
Step A2: taking the top and bottom interfaces of the track-explained compound sand body of the curved stream as constraints, and manufacturing equal-proportion stratum slices based on three-dimensional seismic data;
step A3: combining stratum equal proportion slices by adopting a slice deduction analysis technology based on the sedimentary geological features and combined with an initial uphole relative isochronous sedimentary interface to obtain an initial relative isochronous sedimentary interface;
step A4: based on the three-dimensional seismic data, taking the initial relative isochronous deposit interface as constraint, carrying out well-seismic interaction, optimizing the relative isochronous deposit interface, and obtaining the final equal-time deposit interface in the longitudinal period of the composite sand body of the curved stream.
3. The qualitative characterization method for river channel sand connectivity according to claim 2, wherein the step of acquiring the longitudinal interval interlayer sensitive seismic attribute of the inside of the composite sand body of the curved stream based on the deposition interface and the three-dimensional seismic data when the longitudinal intervals of the composite sand body of the curved stream are equal comprises the following steps:
step B1: b, extracting seismic attributes representing the interlayer based on three-dimensional seismic data according to the equal deposition interface of the longitudinal periods in the composite sand body of the curvelet obtained in the step A4;
step B2: based on the equal deposition interface and the tracking and interpretation of the top and bottom interfaces of the composite sand body in the longitudinal period of the composite sand body of the curtret, carrying out well shock interaction, and counting the thickness of the real well drilling interlayer;
step B3: and performing correlation analysis on the seismic attribute and the thickness of the interlayer, selecting sensitive seismic attribute of the interlayer, and calibrating and classifying the attribute by combining the thickness of the real well drilling interlayer.
4. The qualitative characterization method for river channel sand connectivity according to claim 3, wherein the method for acquiring the longitudinal secondary reservoir sensitive seismic attribute change rate in the composite sand body of the curved stream based on the top and bottom interfaces of the composite sand body of the curved stream and three-dimensional seismic data comprises the following steps:
step C1: respectively extracting longitudinal secondary seismic attributes of the compound sand body of the curved flow river by taking a time window of a tracking and explaining equal deposition interface of the top and bottom interfaces of the compound sand body and the longitudinal secondary of the compound sand body of the curved flow river;
step C2: taking a tracking and explaining composite sand body top interface and a deposition interface when longitudinal periods in the composite sand body of the curtreta as constraints, and counting the thickness of the actual drilling sand body of each longitudinal period in the composite sand body of the curtreta;
step C3: performing correlation analysis on the longitudinal secondary seismic attributes in the curved-flow-river composite sand body and the thickness of the real drilling sand body, and selecting the longitudinal secondary reservoir sensitive seismic attributes in the curved-flow-river composite sand body;
step C4: and (3) solving the maximum curvature of the sensitive seismic attribute of the reservoir in each longitudinal period in the compound sand body of the curved flow and obtaining the change rate of the sensitive seismic attribute of the reservoir in each longitudinal period in the compound sand body of the curved flow.
5. The qualitative characterization method for river channel sand connectivity according to claim 4, wherein qualitative characterization is performed on the river channel sand connectivity of the curved stream based on longitudinal interval interlayer sensitive seismic attributes in the composite sand of the curved stream and longitudinal reservoir sensitive seismic attribute change rates of each period in the composite sand of the curved stream, specifically comprising the following steps:
step D1: grading the connectivity among the river sand bodies in each longitudinal stage of the first-level curved-stream composite sand body according to the thickness of the real drilling interlayer obtained in the step B2 and the sensitive seismic attribute of the interlayer selected in the step B3, so as to obtain the connectivity boundaries of the river sand bodies in different levels;
step D2: c4, linearly characterizing the change rate of the sensitive seismic attribute of the longitudinal secondary reservoir in each period in the compound sand body of the curved-flow river obtained in the step C, and obtaining an initial reservoir configuration boundary;
step D3: d2, according to the initial reservoir configuration boundary obtained in the step, combining the river channel sand body superposition patterns to obtain different types of configuration boundaries inside the longitudinal stages of the composite sand body of the curved stream river;
step D4: and carrying out qualitative analysis on boundary connectivity of different types of configurations by combining production dynamic characteristics to obtain a qualitative characterization result of the river sand connectivity in the advanced composite river SQ 2.
6. The method for qualitatively characterizing river course sand connectivity of claim 1, wherein the three-dimensional seismic data comprises: post-stack seismic data, seismic velocity volumes.
7. The method for qualitatively characterizing river course sand connectivity of claim 1, wherein the geological data comprises: drilling data, logging data, core data, and geologic layering; the logging data includes: logging curves and logging interpretation results.
8. The utility model provides a qualitative characterization device of river course sand body connectivity which characterized in that includes:
the first processing unit is used for tracking and explaining the top and bottom interfaces of the compound sand body of the curved stream by utilizing the three-dimensional seismic data and combining geological data and logging data;
the second processing unit is used for acquiring an equal sedimentation interface in the longitudinal period of the compound sand body of the curved stream based on the top and bottom interfaces of the compound sand body of the curved stream and the three-dimensional seismic data;
the third processing unit is used for acquiring the sensitive seismic attribute of the interval interlayer of the longitudinal period inside the compound sand body of the curved stream based on the equal deposition interface of the longitudinal period inside the compound sand body of the curved stream and the three-dimensional seismic data;
the fourth processing unit is used for acquiring the longitudinal secondary reservoir sensitive seismic attribute change rate in the compound sand body of the curved stream based on the top and bottom interfaces of the compound sand body of the curved stream and the three-dimensional seismic data;
and the fifth processing unit is used for qualitatively characterizing the connectivity of the river channel sand body of the curved stream based on the change rate of the longitudinal interval interlayer sensitive seismic attribute in the compound sand body of the curved stream and the longitudinal reservoir sensitive seismic attribute in each period in the compound sand body of the curved stream.
9. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor performs the steps of the river sand connectivity qualitative characterization method according to any of claims 1-7.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor performs the steps of the qualitative characterization method for river sand connectivity of any one of claims 1-7 when the computer program is executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310124152.1A CN116184526A (en) | 2023-02-16 | 2023-02-16 | Qualitative characterization method, device, medium and equipment for river channel sand connectivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310124152.1A CN116184526A (en) | 2023-02-16 | 2023-02-16 | Qualitative characterization method, device, medium and equipment for river channel sand connectivity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116184526A true CN116184526A (en) | 2023-05-30 |
Family
ID=86441869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310124152.1A Pending CN116184526A (en) | 2023-02-16 | 2023-02-16 | Qualitative characterization method, device, medium and equipment for river channel sand connectivity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116184526A (en) |
-
2023
- 2023-02-16 CN CN202310124152.1A patent/CN116184526A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109061765B (en) | Trap evaluation method for heterogeneous thin sandstone interbed reservoir | |
| WO2019062655A1 (en) | Method and device for determining thin interlayer | |
| CN106842307B (en) | Reservoir stratum fine prediction method based on waveform classification and retrieval under forward constraint | |
| CN103472484B (en) | Horizontal well path optimization method based on RS three-dimensional sensitive earthquake attributive analysis | |
| RU2661489C1 (en) | Method of integrating initial data to update filtration structure of non-uniform carbonate reservoirs | |
| CN110579802B (en) | High-precision inversion method for physical property parameters of natural gas hydrate reservoir | |
| CN105445800A (en) | Thick sand body top differentiation lithologic reservoir identification method | |
| CN109541685B (en) | River channel sand body identification method | |
| CN109425900B (en) | Seismic reservoir prediction method | |
| CN110717301A (en) | Flow unit information classification and identification method based on support vector machine algorithm | |
| CN103713319A (en) | Prestack inversion method based on seismic restrained modeling | |
| CN112505754B (en) | Method for collaborative partitioning sedimentary microfacies by well-seismic based on high-precision sequence grid model | |
| Trippetta et al. | Carbonate-ramp reservoirs modelling best solutions: Insights from a dense shallow well database in Central Italy | |
| CN115857047B (en) | Comprehensive prediction method for earthquake reservoir | |
| CN111155980B (en) | Water flow dominant channel identification method and device | |
| CN112433248B (en) | Method for detecting hidden reservoir stratum in carbonate rock deposition environment | |
| CN116184526A (en) | Qualitative characterization method, device, medium and equipment for river channel sand connectivity | |
| CN115576011B (en) | Geological model-based phased reservoir prediction method, device and system | |
| Li et al. | Three-dimensional reservoir architecture modeling by geostatistical techniques in BD block, Jinhu depression, northern Jiangsu Basin, China | |
| CN113093275B (en) | Method and device for improving drilling success rate of curved-flow river and curved-flow river delta oilfield | |
| CN113376692B (en) | Method and device for optimizing fracturing modification scheme of tight sandstone gas horizontal well | |
| CN113740911B (en) | Method for improving reservoir prediction precision based on coordinate rotation wave impedance inversion | |
| CN113495293B (en) | Reservoir fluid prediction method and device | |
| Hamdulla et al. | Building geological model for tertiary reservoir of exploration Ismail oil field, North Iraq | |
| CN111812743B (en) | Identification method of single sand body of reservoir |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |