Method and device for depth domain joint interpretation of multi-type data of high and steep complex structure

Abstract

The invention provides a high and steep complex structure multi-type data depth domain joint interpretation method and device, and the method comprises the steps: obtaining the surface elevation and geological information, and carrying out the full-profile three-dimensional interpretation through the prestack depth migration depth domain seismic data volume according to the obtained surface elevation and geological information, and combining the horizon slicing of a coherent body and an ant body. According to the method, the estimation speed does not need to be transferred to a time domain, different types of depth domain data such as drilling and geological mapping are directly digitized to an interpretation platform, different types of information are combined with depth domain seismic data subjected to depth migration processing to jointly carry out structure interpretation, the reliability of a seismic section structure interpretation scheme is guaranteed, and the method is suitable for popularization and application. And the accuracy of the overlap line and the breakpoint of the plane structure diagram is improved.

Description

Technical Field

[0001] The present invention belongs to the field of geophysical exploration technology, and in particular, relates to a method and device for joint interpretation of multi-type data in a deep domain of high-steep and complex structures. Background Art

[0002] With the continuous improvement of exploration, shale oil and gas at the edge of the basin has become a key area for increasing reserves and production. The edge of the basin is squeezed and often develops high and steep thrust structures, making the structural conditions complicated. The exposure of old underground strata and faults on the surface and the lack of near-offset data in seismic data collection have led to poor imaging of shallow seismic data. Therefore, it is difficult to accurately depict the surface overburden line and implement the underground structure interpretation plan only with seismic data.

[0003] At present, the mainstream structural interpretation is still based on time-domain 3D seismic data. The methods and processes of time-domain 3D seismic fine structural interpretation are relatively mature. Liu Lifeng et al. published "Methods, Processes and Key Technologies for 3D Fine Structural Interpretation" in "Progress in Geophysics" in 2006, which detailed the methods and processes of 3D fine structural interpretation. For complex and steep structures, especially when shallow seismic data is missing, other auxiliary interpretation methods are required, such as a method of auxiliary seismic data interpretation disclosed in Chinese invention patent CN201911102336.8. This method uses data such as processing replacement velocity, processing base plane, and geological profile topographic lines to convert geological profiles into seismic time profiles, and then manually interprets and draws the layers and faults of the seismic geological structure model to form a seismic geological profile.

[0004] Although this method based on three-dimensional seismic data in the time domain combined with auxiliary interpretation methods has solved the problem of lack of shallow data to a certain extent, the depth domain information such as wells and geological profiles needs to be converted to the time domain through well-seismic calibration. This interpretation method of converting to the time domain ignores the strong anisotropy of high-steep structures. Accurate velocity calculation itself is a difficult problem. Simply using replacement velocity to convert the apparent dip on the geological profile to the time dip on the seismic profile cannot accurately describe the true structural characteristics. Summary of the invention

[0005] The embodiments of the present application provide a method and device for joint interpretation of multi-type data in the depth domain of high-steep and complex structures, which ensures the reliability of the seismic profile structure interpretation scheme and improves the accuracy of the overlap lines and breakpoints of the planar structure map.

[0006] In the first aspect, an embodiment of the present application provides a method for joint interpretation of multi-type data in the depth domain of steep and complex structures, including: acquiring surface elevation and geological information, and based on the acquired surface elevation and geological information, performing full-profile stereoscopic interpretation by pre-stack depth migration of the depth domain seismic data body, combining coherence body and ant body slices along the layers.

[0007] Among them, obtaining the surface elevation and geological information includes: obtaining the geological information on the geological map, the geological information including the superimposed line and fault information, digitizing the superimposed line and fault information, the digital processing content includes the horizontal coordinate value X, the vertical coordinate value Y and the boundary line name ID, and loading the superimposed line and fault information into the interpretation system in the form of a boundary line.

[0008] Among them, obtaining surface elevation and geological information also includes: obtaining the position of the shot check point of seismic acquisition, the shot check point position includes the horizontal coordinate value X, the vertical coordinate value Y and the height value Z, loading it into the interpretation system in the form of a layer, and interpolating it after loading as surface elevation information; in the interpretation system, according to the faults and the dip and inclination of the strata marked on the geological map, the structural characteristics of the skeleton survey line are inferred, and a structural interpretation model is established.

[0009] Among them, according to the acquired surface elevation and geological information, the depth domain seismic data body is migrated through pre-stack depth, combined with the coherence body and ant body along-layer slicing, and the full-section stereoscopic interpretation is carried out, including: the depth domain seismic data processed by depth migration is input into the interpretation system, and the coherence body and ant body are operated, and then the time window is opened along the interpretation layer to form the attributes along the layer and identify the faults on the plane.

[0010] Among them, based on the acquired surface elevation and geological information, the depth domain seismic data body is migrated through pre-stack depth, combined with the coherence body and ant body along-layer slicing, and the full-profile stereoscopic interpretation is carried out, which also includes: on the seismic depth domain profile, the surface geological information and the underground depth domain seismic information are combined, the geological profile is established on the surface using the structural element information of the digitized geological map, and the seismic interpretation is encrypted underground using the depth domain seismic data processed by depth migration.

[0011] Among them, according to the acquired surface elevation and geological information, the depth domain seismic data body is migrated through pre-stack depth, and the coherence body and ant body are sliced ​​along the layer to carry out the full-section stereoscopic interpretation, which also includes: outputting the depth domain interpretation results of the structural elements, the structural elements include strata, overlap lines and faults, and the data format is the horizontal coordinate value X, the vertical coordinate value Y and the depth value Z, which is used for mapping software to compile drawings.

[0012] On the second aspect, the present application provides a device for joint interpretation of multi-type data in the depth domain of steep and complex structures, including: an acquisition unit for acquiring surface elevation and geological information; an interpretation unit for conducting full-profile stereoscopic interpretation based on the acquired surface elevation and geological information, through pre-stack depth migration of depth domain seismic data bodies, combined with coherence bodies and ant bodies along layer slices.

[0013] The acquisition unit is used to acquire geological information on the geological map, wherein the geological information includes superimposed lines and fault information, and digitally process the superimposed lines and fault information. The digitally processed content includes the horizontal coordinate value X, the vertical coordinate value Y and the boundary line name ID. The superimposed lines and fault information are loaded into the interpretation system in the form of boundary lines.

[0014] In a third aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of any of the above methods when executed by a processor.

[0015] In a fourth aspect, an embodiment of the present application provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any of the above methods when executing the program.

[0016] The method and device for joint interpretation of multi-type data in deep domain with high steepness and complex structure according to the embodiment of the present application have the following beneficial effects:

[0017] The present application proposes a method and device for interpreting shallow, medium and deep layers in multi-dimensional depth domains by combining geological digital mapping, geological model guidance and depth-shifted three-dimensional seismic for high-steep and complex structural areas, which ensures the reliability of the seismic profile structural interpretation scheme and improves the accuracy of the overlap lines and breakpoints of the planar structural map. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the method flow for joint interpretation of multi-type data in deep domain with high steepness and complex structure according to an embodiment of the present application;

[0019] Figure 2 Another flowchart of the method for joint interpretation of multi-type data in deep domain with high steepness and complex structure according to an embodiment of the present application;

[0020] Figure 3 Schematic diagram of the system for inputting the digitized information on the geological map in this application into the interpretation system;

[0021] Figure 4 The section diagram of the interpretation model inferred in this application based on the information indicated on the geological map;

[0022] Figure 5 A schematic diagram of extracting coherence volume and ant volume slices to assist fault interpretation in the depth domain seismic volume in this application;

[0023] Figure 6 A schematic diagram of the seismic interpretation in the low signal-to-noise ratio area assisted by the interpretation model in this application;

[0024] Figure 7Schematic diagram of the structure of the device for deep-domain joint interpretation of multi-type data with high-steepness and complex structures according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0026] In the following introduction, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The following introduction provides multiple embodiments of the present invention, and different embodiments can be replaced or combined, so this application can also be considered to include all possible combinations of the same and / or different embodiments recorded. Therefore, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then this application should also be considered to include embodiments containing one or more of all other possible combinations of features A, B, C, and D, even though the embodiment may not be clearly recorded in the following text.

[0027] Embodiment 1

[0028] like Figure 1 As shown, the method for joint interpretation of multi-type data in the depth domain of high-steep and complex structures in the present application includes: S1, obtaining surface elevation and geological information; S2, based on the obtained surface elevation and geological information, through pre-stack depth migration of the depth domain seismic data body, combined with coherence body and ant body along layer slices, to carry out full-section stereoscopic interpretation.

[0029] In this application, geological information on the geological map is obtained and the obtained geological information is digitized; surface elevation information is obtained, and a structural interpretation model is established based on the information on the geological map; faults are identified on the plane based on the depth domain seismic data processed by depth migration; on the seismic depth domain profile, the surface geological information and the underground depth domain seismic information are combined; and finally, the depth domain interpretation results are output.

[0030] The interpretation results of this application are in the depth domain, so there is no need to convert the interpretation results from the time domain to the depth domain through various complex time-depth conversion methods. It can be applied to the structural interpretation of high-steep and complex structural areas. Moreover, with the industrialization and popularization of depth migration, the joint interpretation of multiple types of data in the depth domain will be increasingly used in future seismic structural interpretation.

[0031] Embodiment 2

[0032] like Figure 2As shown in the figure, the actual data of a certain work area were applied. After the geological map of the work area was digitized, the surface elevation, overlap line and fault information were obtained as the basis. Through the pre-stack depth migration of the depth domain seismic data body, combined with the coherence body and ant body along the layer slice, a three-dimensional interpretation of the shallow, medium and deep full profile was carried out, which ensured the reliability of the seismic profile structural interpretation plan, improved the accuracy of the overlap line and breakpoints of the plane structural map, and realized the method of joint interpretation in the depth domain based on multi-type data.

[0033] Step 1: Digitize the overlap lines and faults on the geological map to assist in the interpretation of structural map elements. Obtain the overlap line and fault information on the geological map, digitize the overlap line and fault information, and convert it into a format recognizable by the interpretation system, including the horizontal coordinate value X, the vertical coordinate value Y and the boundary line name ID, and load it into the interpretation system in the form of a boundary line.

[0034] Step 2, such as Figure 3 As shown, the shot check point position of seismic acquisition is obtained. The shot check point position includes the horizontal coordinate value X, the vertical coordinate value Y and the height value Z, which are loaded into the interpretation system in the form of horizons and interpolated after loading as surface elevation information.

[0035] Step three, such as Figure 4 As shown in the figure, in the interpretation system, according to the faults and strata marked on the geological map, the structural characteristics of the skeleton survey line are inferred, and the structural interpretation model is established to assist the structural interpretation of the low signal-to-noise ratio area. The interpretation results are saved in the form of horizons and fault bars, which are convenient for combining with the interpretation results of seismic data.

[0036] Step 4: Figure 5 As shown in the figure, the depth domain seismic data processed by depth migration are input into the interpretation system, and volume operations such as coherence volume and ant volume are performed. Then, a time window is opened along the interpretation layer to form layer attributes, identify faults on the plane, and assist in the interpretation of low-order (3rd and 4th order) small faults.

[0037] Step 5: Figure 6 As shown in the figure, the seismic depth domain profile combines multiple information, encrypts the interpretation line according to the data quality classification, and improves the three-dimensional interpretation scheme of the shallow, medium and deep full profile. In the seismic depth domain profile, the surface geological information and the underground depth domain seismic information are combined. The geological profile is established on the surface using the structural element information of the digitized geological map. The underground (deep layer) uses the depth domain seismic data processed by depth migration to encrypt the seismic interpretation, and improve the shallow and deep profile interpretation scheme. The seismic data lacks data from the surface to about 200 meters underground, so the surface geological map information is used to make up for it. The combination of multiple information means combining the surface geological information with the depth domain seismic data information processed by underground depth migration. The surface geological information includes but is not limited to the faults marked on the geological map, the inclination and dip of the strata.

[0038] Step 6: Output the depth domain interpretation results, including but not limited to strata, overlays, faults and other structural elements, and compile the target layer structural map. Output the depth domain interpretation results of structural elements such as strata, overlays and faults. The data format is the horizontal coordinate value X, the vertical coordinate value Y and the depth value Z, which can be used to compile maps with mainstream mapping software.

[0039] Compared with other existing methods, the method of the present application does not need to estimate the velocity to the time domain, and directly digitizes different types of depth domain data such as drilling and geological mapping to the interpretation platform. The method of the present application combines different types of information with the depth domain seismic data processed by depth migration to jointly carry out structural interpretation, and finally outputs the depth domain interpretation results, which can be used for the compilation of structural maps.

[0040] This application is a three-dimensional seismic data interpretation method for high-steep and complex structural areas. Through a method based on the joint interpretation of multi-type data in the depth domain, the reliability of the seismic profile structural interpretation scheme is guaranteed. The erosion line and fault data of this application are derived from real surface geological mapping, which improves the accuracy of the overlap line and breakpoint of the plane structural map.

[0041] like Figure 7 As shown, the device for joint interpretation of multi-type data in the depth domain of high-steep and complex structures in the present application includes: an acquisition unit 201, used to obtain surface elevation and geological information; an interpretation unit 202, used to carry out full-section stereoscopic interpretation based on the acquired surface elevation and geological information, through pre-stack depth migration of the depth domain seismic data body, combined with coherence body and ant body along layer slicing.

[0042] Among them, the acquisition unit is used to obtain geological information on the geological map, the geological information includes overlying line and fault information, and digitizes the overlying line and fault information. The digital processing content includes the horizontal coordinate value X, the vertical coordinate value Y and the boundary line name ID, and the overlying line and fault information are loaded into the interpretation system in the form of boundary lines.

[0043] In the present application, an embodiment of a device for joint interpretation of multi-type data of high-steepness and complex structures in depth domain is basically similar to an embodiment of a method for joint interpretation of multi-type data of high-steepness and complex structures in depth domain. For relevant matters, please refer to the introduction of the embodiment of the method for joint interpretation of multi-type data of high-steepness and complex structures in depth domain.

[0044] The embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the method steps of the deep domain joint interpretation of multi-type data with high steepness and complex structure are implemented. The computer-readable storage medium may include, but is not limited to, any type of disk, including a floppy disk, an optical disk, a DVD, a CD-ROM, a micro drive, and a magneto-optical disk, a ROM, a RAM, an EPROM, an EEPROM, a DRAM, a VRAM, a flash memory device, a magnetic card or an optical card, a nanosystem (including a molecular memory IC), or any type of medium or device suitable for storing instructions and / or data.

[0045] The present application also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, any of the above-mentioned method steps for deep domain joint interpretation of multi-type data with high steepness and complex structure is implemented.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for joint interpretation of multi-type data in deep domain with high steepness and complex structure, characterized by: include: Obtain surface elevation and geological information, and carry out full-section stereoscopic interpretation based on the acquired surface elevation and geological information by pre-stack depth migration of depth domain seismic data volume, combined with coherence volume and ant volume along layer slices.

2. The method for deep domain joint interpretation of multi-type data of high-steep complex structures according to claim 1 is characterized by: Acquiring surface elevation and geological information includes: acquiring geological information on a geological map, the geological information including overlying lines and fault information, digitizing the overlying lines and fault information, the digitized content including the horizontal coordinate value X, the vertical coordinate value Y and the boundary line name ID, and loading the overlying lines and fault information into an interpretation system in the form of a boundary line.

3. The method for deep domain joint interpretation of multi-type data of high-steep complex structures according to claim 1 or 2, characterized in that: Acquiring surface elevation and geological information also includes: acquiring the position of the shot checkpoints collected by seismic acquisition, wherein the shot checkpoint positions include the abscissa value X, the ordinate value Y and the height value Z, and loading them into the interpretation system in the form of a layer, and interpolating them after loading as surface elevation information; in the interpretation system, according to the faults and the dip and inclination of the strata marked on the geological map, the structural characteristics of the skeleton survey line are inferred, and a structural interpretation model is established.

4. The method for deep domain joint interpretation of multi-type data of high-steep complex structures according to claim 1 or 2, characterized in that: According to the acquired surface elevation and geological information, the depth domain seismic data volume is migrated through pre-stack depth, combined with the coherence volume and ant volume slices along the layer, and the full-section stereoscopic interpretation is carried out, including: the depth domain seismic data processed by depth migration is input into the interpretation system, and the coherence volume and ant volume operations are performed, and then the time window is opened along the interpretation layer to form the layer attributes and identify the faults on the plane.

5. The method for deep domain joint interpretation of multi-type data of high-steep complex structures according to claim 1 or 2, characterized in that: Based on the acquired surface elevation and geological information, the depth domain seismic data volume is migrated through pre-stack depth, combined with coherence volume and ant volume along-layer slicing, and the full-profile stereoscopic interpretation is carried out, which also includes: on the seismic depth domain profile, the surface geological information and the underground depth domain seismic information are combined, the geological profile is established on the surface using the structural element information of the digitized geological map, and the underground seismic interpretation is encrypted using the depth domain seismic data processed by depth migration.

6. The method for deep domain joint interpretation of multi-type data of high-steep complex structures according to claim 1 or 2, characterized in that: According to the acquired surface elevation and geological information, the depth domain seismic data volume is migrated through pre-stack depth, and the coherence volume and ant volume are sliced ​​along the layer to carry out the full-section stereo interpretation, which also includes: outputting the depth domain interpretation results of the structural elements, the structural elements include the horizon, overlap line and fault, and the data format is the horizontal coordinate value X, the vertical coordinate value Y and the depth value Z, which is used for mapping software to compile drawings.

7. A device for joint interpretation of multi-type data in deep domain with high steepness and complex structure, characterized in that: include: An acquisition unit, used to acquire surface elevation and geological information; The interpretation unit is used to carry out full-section stereoscopic interpretation based on the acquired surface elevation and geological information, through pre-stack depth migration of the depth domain seismic data body, combined with coherence body and ant body along layer slices.

8. The device for deep domain joint interpretation of multi-type data of high-steep complex structures according to claim 7 is characterized in that: The acquisition unit is used to acquire geological information on a geological map, wherein the geological information includes superimposed lines and fault information, and digitally process the superimposed lines and fault information, wherein the digitally processed content includes abscissa value X, ordinate value Y and boundary line name ID, and load the superimposed lines and fault information into an interpretation system in the form of boundary lines.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method described in any one of claims 1 to 6 are implemented.

10. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the method described in any one of claims 1 to 6 are implemented.

Images