CN112505780B - Formation depth data correction method and device - Google Patents
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/36—Effecting static or dynamic corrections on records, e.g. correcting spread; Correlating seismic signals; Eliminating effects of unwanted energy
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- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
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- G01V1/345—Visualisation of seismic data or attributes, e.g. in 3D cubes
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Abstract
The invention discloses a method and a device for correcting stratum depth data, wherein the method comprises the following steps: determining imaging data of WALKAWAY VSP line according to seismic data acquired by WALKAWAY VSP line; according to imaging data of the WALKAWAY VSP measuring line, stratum depth data corresponding to the imaging data of the WALKAWAY VSP measuring line are determined; carrying out seismic forward on imaging data in the plumb line direction of the WALKAWAY VSP line according to geological data of the WALKAWAY VSP line area; according to stratum depth data after forward modeling of the earthquake, stratum depth data corresponding to imaging data of WALKAWAY VSP survey lines are corrected, the accuracy of the stratum depth data of the imaging data of WALKAWAY VSP survey lines is improved, and effective support is provided for horizontal well geosteering.
Description
Technical Field
The invention relates to the technical field of geophysical exploration, in particular to a method and a device for correcting stratum depth data.
Background
Travel calculations of Vertical Seismic Profiling (VSP) technology commonly used in the industry are premised on horizontal layer media, and in fact, the propagation of seismic waves from sources to detectors follows the shortest travel time principle of the charge Ma Dingli. WALKAWAY VSP is one of VSP exploration techniques, and when the WALKAWAY VSP line is not perpendicular to the formation structure, the WALKAWAY VSP imaging section reflects the formation depth not in the direction of plumb lines of each point along the line, but in the direction of formation depth on the intersection line of the ray plane passing through the line and the formation boundary, so that a larger error exists in the formation depth data acquired by the WALKAWAY VSP line.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the invention provides a correction method of stratum depth data, which is used for improving the accuracy of stratum depth data acquired by WALKAWAY VSP survey lines, and comprises the following steps:
determining imaging data of WALKAWAY VSP line according to seismic data acquired by WALKAWAY VSP line;
according to imaging data of the WALKAWAY VSP measuring line, stratum depth data corresponding to the imaging data of the WALKAWAY VSP measuring line are determined;
Carrying out seismic forward on imaging data in the plumb line direction of the WALKAWAY VSP line according to geological data of the WALKAWAY VSP line area;
And correcting stratum depth data corresponding to imaging data of WALKAWAY VSP survey lines according to stratum depth data after forward modeling of the earthquake.
The embodiment of the invention provides a correction device of stratum depth data, which is used for improving the accuracy of stratum depth data acquired by WALKAWAY VSP survey lines, and comprises the following steps:
The imaging data determining module is used for determining imaging data of the WALKAWAY VSP line according to the seismic data acquired by the WALKAWAY VSP line;
The stratum depth data determining module is used for determining stratum depth data corresponding to imaging data of the WALKAWAY VSP line according to imaging data of the WALKAWAY VSP line;
The forward modeling module is used for performing earthquake forward modeling on imaging data in the plumb line direction of the WALKAWAY VSP line according to geological data of the WALKAWAY VSP line area;
And the correction module is used for correcting the stratum depth data corresponding to the imaging data of the WALKAWAY VSP survey line according to the stratum depth data after forward modeling of the earthquake.
The embodiment of the invention also provides computer equipment, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the method for correcting the stratum depth data when executing the computer program.
The embodiment of the invention also provides a computer readable storage medium, and the computer readable storage medium stores a computer program for executing the formation depth data correction method.
The embodiment of the invention is as follows: determining imaging data of WALKAWAY VSP line according to seismic data acquired by WALKAWAY VSP line; according to imaging data of the WALKAWAY VSP measuring line, stratum depth data corresponding to the imaging data of the WALKAWAY VSP measuring line are determined; carrying out seismic forward on imaging data in the plumb line direction of the WALKAWAY VSP line according to geological data of the WALKAWAY VSP line area; and correcting stratum depth data corresponding to imaging data of the WALKAWAY VSP line according to stratum depth data after forward modeling of the earthquake, correcting stratum depth data of imaging data of the WALKAWAY VSP line based on stratum depth data obtained by forward modeling of the imaging data of the plumb line, improving accuracy of stratum depth data of imaging data of the WALKAWAY VSP line, and providing effective support for geosteering of a horizontal well.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a schematic diagram of a flow chart of a method for correcting formation depth data according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing a specific flow of step 104 in FIG. 1;
FIG. 3 is a schematic diagram of formation depth data corresponding to imaging data of WALKAWAY VSP lines and formation depth data after forward modeling of an earthquake in an embodiment of the present invention;
FIG. 4 is a schematic diagram of interpolation processing of formation depth data corresponding to imaging data of WALKAWAY VSP lines in an embodiment of the present invention;
FIG. 5 is a schematic diagram of formation depth data correction results according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a structure of a device for correcting formation depth data according to an embodiment of the present invention;
fig. 7 is a schematic diagram of an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Those skilled in the art will appreciate that embodiments of the invention may be implemented as a system, apparatus, method, or computer program product. Accordingly, the present disclosure may be embodied in the following forms, namely: complete hardware, complete software (including firmware, resident software, micro-code, etc.), or a combination of hardware and software.
In order to solve the technical problem that in the prior art, when a WALKAWAY VSP line is not perpendicular to a stratum structure, a stratum depth reflected by an imaging section of a WALKAWAY VSP line is a stratum depth on a line intersecting a stratum demarcation through a ray plane of the line, so that a larger error exists in stratum depth data acquired by a WALKAWAY VSP line, the embodiment of the invention provides a method for correcting stratum depth data, which is used for improving accuracy of stratum depth data acquired by a WALKAWAY VSP line, and fig. 1 is a schematic diagram of a flow of the method for correcting stratum depth data in the embodiment of the invention, and the method comprises the following steps:
Step 101: determining imaging data of WALKAWAY VSP line according to seismic data acquired by WALKAWAY VSP line;
Step 102: according to imaging data of the WALKAWAY VSP measuring line, stratum depth data corresponding to the imaging data of the WALKAWAY VSP measuring line are determined;
step 103: carrying out seismic forward on imaging data in the plumb line direction of the WALKAWAY VSP line according to geological data of the WALKAWAY VSP line area;
step 104: and correcting stratum depth data corresponding to imaging data of WALKAWAY VSP survey lines according to stratum depth data after forward modeling of the earthquake.
As shown in fig. 1, the embodiment of the invention is implemented by: determining imaging data of WALKAWAY VSP line according to seismic data acquired by WALKAWAY VSP line; according to imaging data of the WALKAWAY VSP measuring line, stratum depth data corresponding to the imaging data of the WALKAWAY VSP measuring line are determined; carrying out seismic forward on imaging data in the plumb line direction of the WALKAWAY VSP line according to geological data of the WALKAWAY VSP line area; and correcting stratum depth data corresponding to imaging data of the WALKAWAY VSP line according to stratum depth data after forward modeling of the earthquake, correcting stratum depth data of imaging data of the WALKAWAY VSP line based on stratum depth data obtained by forward modeling of the imaging data of the plumb line, improving accuracy of stratum depth data of imaging data of the WALKAWAY VSP line, and providing effective support for geosteering of a horizontal well.
In specific implementation, in step 101, original seismic data acquired by WALKAWAY VSP lines may be obtained, imaging processing is performed on the original seismic data acquired by WALKAWAY VSP lines to obtain imaging data of WALKAWAY VSP lines, and in step 102, formation depth data corresponding to imaging data of WALKAWAY VSP lines may be picked up from imaging data of WALKAWAY VSP lines.
In one embodiment, in step 103, performing seismic forward on imaging data of WALKAWAY VSP in the plumb line direction according to geological data of the WALKAWAY VSP line area may include:
determining the stratum depth and stratum speed of the WALKAWAY VSP line region according to geological data of the WALKAWAY VSP line region;
and carrying out seismic forward modeling on imaging data in the plumb line direction of the WALKAWAY VSP survey line according to the stratum depth and stratum speed of the WALKAWAY VSP survey line area.
In the implementation, in step 103, three-dimensional space formation depth data and formation velocity data of the WALKAWAY VSP line area may be obtained according to geological data of the WALKAWAY VSP line area, and based on the formation depth data and the formation velocity data, forward seismic modeling may be performed on imaging data of the WALKAWAY VSP line in the plumb line direction, where the obtained forward seismic modeling result includes the formation depth data.
Fig. 2 is a schematic diagram of a specific flow of step 104 in fig. 1, and in an embodiment, in step 104, correcting formation depth data corresponding to imaging data of WALKAWAY VSP lines according to formation depth data after forward modeling of an earthquake may include:
Step 201: determining errors of stratum depth data corresponding to imaging data of a WALKAWAY VSP line according to stratum depth data after forward modeling of an earthquake and stratum depth data corresponding to imaging data of the WALKAWAY VSP line;
Step 202: and correcting the stratum depth data corresponding to the imaging data of the WALKAWAY VSP line according to the error of the stratum depth data corresponding to the imaging data of the WALKAWAY VSP line.
In one embodiment, in step 202, correcting the formation depth data corresponding to the imaging data of the WALKAWAY VSP line according to the error of the formation depth data corresponding to the imaging data of the WALKAWAY VSP line may include:
And carrying out interpolation processing on the stratum depth data corresponding to the imaging data of the WALKAWAY VSP line according to the error of the stratum depth data corresponding to the imaging data of the WALKAWAY VSP line.
In specific implementation, fig. 3 is a schematic diagram of formation depth data corresponding to imaging data of a WALKAWAY VSP line and formation depth data after forward modeling of an earthquake, in fig. 3, dark lines are formation depth data corresponding to imaging data of a WALKAWAY VSP line, light lines are formation depth data after forward modeling of an earthquake, as shown in fig. 3, certain differences exist between the formation depth data of the two, in step 104, correction can be performed on formation depth data corresponding to imaging data of a WALKAWAY VSP line according to formation depth data after forward modeling of an earthquake, specifically, fig. 4 is a schematic diagram of interpolation processing is performed on formation depth data corresponding to imaging data of a WALKAWAY VSP line in an embodiment of the present invention, as shown in fig. 4, errors of formation depth data corresponding to imaging data of a WALKAWAY VSP line can be calculated according to formation depth data after forward modeling of an earthquake and formation depth data corresponding to imaging data of WALKAWAY VSP, and then interpolation processing is performed on formation depth data corresponding to imaging data of a WALKAWAY VSP line based on the errors.
Fig. 5 is a schematic diagram of a formation depth data correction result in the embodiment of the present invention, as shown in fig. 5, formation depth data corresponding to imaging data of a WALKAWAY VSP line after correction is consistent with formation depth data after forward modeling of an earthquake, and since the formation depth data after forward modeling of the earthquake is obtained based on imaging data in a plumb line direction of a WALKAWAY VSP line, formation depth data corresponding to imaging data of a WALKAWAY VSP line after correction can reflect formation depth in a plumb line direction of each point along the line, thereby reducing influence of factors such as WALKAWAY VSP line and formation angle, formation depth, formation inclination angle, formation speed, etc. on formation depth data precision of imaging data of a WALKAWAY VSP line, improving precision of formation depth data of imaging data of a WALKAWAY VSP line, and providing effective support for geological guiding of a horizontal well.
It should be noted that although the operations of the method of the present invention are depicted in the drawings in a particular order, this does not require or imply that the operations must be performed in that particular order or that all of the illustrated operations be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform.
Based on the same inventive concept, the embodiment of the invention also provides a device for correcting stratum depth data, as in the following embodiment. Because the principle of solving the problem of the correction device of the stratum depth data is similar to that of the correction method of the stratum depth data, the implementation of the device can be referred to the implementation of the method, and the repetition is omitted. As used below, the term "unit" or "module" may be a combination of software and/or hardware that implements the intended function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
An embodiment of the present invention provides a device for correcting formation depth data, which is used for improving accuracy of formation depth data acquired by WALKAWAY VSP measuring lines, and fig. 6 is a schematic diagram of a structure of the device for correcting formation depth data in the embodiment of the present invention, as shown in fig. 6, where the device includes:
The imaging data determining module 01 is used for determining imaging data of a WALKAWAY VSP line according to seismic data acquired by the WALKAWAY VSP line;
The formation depth data determining module 02 is configured to determine formation depth data corresponding to imaging data of the WALKAWAY VSP line according to imaging data of the WALKAWAY VSP line;
The forward modeling module 03 is configured to perform seismic forward modeling on imaging data in a plumb line direction of the WALKAWAY VSP line according to geological data of the WALKAWAY VSP line area;
And the correction module 04 is used for correcting the stratum depth data corresponding to the imaging data of the WALKAWAY VSP survey line according to the stratum depth data after forward modeling of the earthquake.
In one embodiment, the correction module is specifically 04 for;
Determining errors of stratum depth data corresponding to imaging data of a WALKAWAY VSP line according to stratum depth data after forward modeling of an earthquake and stratum depth data corresponding to imaging data of the WALKAWAY VSP line;
And correcting the stratum depth data corresponding to the imaging data of the WALKAWAY VSP line according to the error of the stratum depth data corresponding to the imaging data of the WALKAWAY VSP line.
In one embodiment, the correction module 04 is further configured to:
And carrying out interpolation processing on the stratum depth data corresponding to the imaging data of the WALKAWAY VSP line according to the error of the stratum depth data corresponding to the imaging data of the WALKAWAY VSP line.
In one embodiment, the forward module 03 is specifically configured to:
determining the stratum depth and stratum speed of the WALKAWAY VSP line region according to geological data of the WALKAWAY VSP line region;
and carrying out seismic forward modeling on imaging data in the plumb line direction of the WALKAWAY VSP survey line according to the stratum depth and stratum speed of the WALKAWAY VSP survey line area.
The embodiment of the invention also provides computer equipment, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the method for correcting the stratum depth data when executing the computer program.
The embodiment of the invention also provides a computer readable storage medium, and the computer readable storage medium stores a computer program for executing the formation depth data correction method.
The following presents a specific example to facilitate understanding of how the present invention may be practiced.
FIG. 7 is a schematic diagram of an embodiment of the present invention, as shown in FIG. 7, including the following steps;
the first step: obtaining original seismic data acquired by WALKAWAY VSP survey lines;
And a second step of: imaging processing is carried out on the original seismic data acquired by the WALKAWAY VSP measuring line to obtain imaging data of the WALKAWAY VSP measuring line;
and a third step of: picking up stratum depth data corresponding to imaging data of WALKAWAY VSP line from imaging data of WALKAWAY VSP line;
Fourth step: acquiring three-dimensional space stratum depth data and stratum speed data of a WALKAWAY VSP survey line area;
Fifth step: developing a forward earthquake on imaging data of WALKAWAY VSP in the plumb line direction based on stratum depth data and stratum speed data;
sixth step: extracting stratum depth data from the result of forward modeling of the earthquake;
Seventh step: calculating errors of stratum depth data corresponding to imaging data of a WALKAWAY VSP line according to stratum depth data after forward modeling of an earthquake and stratum depth data corresponding to imaging data of the WALKAWAY VSP line;
Eighth step: performing interpolation processing on stratum depth data corresponding to imaging data of WALKAWAY VSP measuring lines according to the error;
Ninth step: and obtaining stratum depth data corresponding to the corrected imaging data of the WALKAWAY VSP measuring lines.
In summary, the embodiment of the invention is as follows: determining imaging data of WALKAWAY VSP line according to seismic data acquired by WALKAWAY VSP line; according to imaging data of the WALKAWAY VSP measuring line, stratum depth data corresponding to the imaging data of the WALKAWAY VSP measuring line are determined; carrying out seismic forward on imaging data in the plumb line direction of the WALKAWAY VSP line according to geological data of the WALKAWAY VSP line area; and correcting stratum depth data corresponding to imaging data of the WALKAWAY VSP line according to stratum depth data after forward modeling of the earthquake, correcting stratum depth data of imaging data of the WALKAWAY VSP line based on stratum depth data obtained by forward modeling of the imaging data of the plumb line, improving accuracy of stratum depth data of imaging data of the WALKAWAY VSP line, and providing effective support for geosteering of a horizontal well.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A method for correcting formation depth data, comprising:
determining imaging data of WALKAWAY VSP line according to seismic data acquired by WALKAWAY VSP line;
according to imaging data of the WALKAWAY VSP measuring line, stratum depth data corresponding to the imaging data of the WALKAWAY VSP measuring line are determined;
Carrying out seismic forward on imaging data in the plumb line direction of the WALKAWAY VSP line according to geological data of the WALKAWAY VSP line area;
Correcting stratum depth data corresponding to imaging data of WALKAWAY VSP survey lines according to stratum depth data after forward modeling of the earthquake;
Correcting stratum depth data corresponding to imaging data of WALKAWAY VSP survey lines according to stratum depth data after forward modeling of an earthquake, wherein the method comprises the following steps:
Determining errors of stratum depth data corresponding to imaging data of a WALKAWAY VSP line according to stratum depth data after forward modeling of an earthquake and stratum depth data corresponding to imaging data of the WALKAWAY VSP line;
And carrying out interpolation processing on the stratum depth data corresponding to the imaging data of the WALKAWAY VSP line according to the error of the stratum depth data corresponding to the imaging data of the WALKAWAY VSP line.
2. The method of claim 1, wherein performing seismic forward on imaging data of the WALKAWAY VSP line in the plumb line direction based on geological data of the WALKAWAY VSP line region comprises:
determining the stratum depth and stratum speed of the WALKAWAY VSP line region according to geological data of the WALKAWAY VSP line region;
and carrying out seismic forward modeling on imaging data in the plumb line direction of the WALKAWAY VSP survey line according to the stratum depth and stratum speed of the WALKAWAY VSP survey line area.
3. A device for correcting formation depth data, comprising:
The imaging data determining module is used for determining imaging data of the WALKAWAY VSP line according to the seismic data acquired by the WALKAWAY VSP line;
The stratum depth data determining module is used for determining stratum depth data corresponding to imaging data of the WALKAWAY VSP line according to imaging data of the WALKAWAY VSP line;
The forward modeling module is used for performing earthquake forward modeling on imaging data in the plumb line direction of the WALKAWAY VSP line according to geological data of the WALKAWAY VSP line area;
The correction module is used for correcting stratum depth data corresponding to imaging data of WALKAWAY VSP survey lines according to stratum depth data after forward modeling of the earthquake;
the correction module is specifically used for;
Determining errors of stratum depth data corresponding to imaging data of a WALKAWAY VSP line according to stratum depth data after forward modeling of an earthquake and stratum depth data corresponding to imaging data of the WALKAWAY VSP line;
And carrying out interpolation processing on the stratum depth data corresponding to the imaging data of the WALKAWAY VSP line according to the error of the stratum depth data corresponding to the imaging data of the WALKAWAY VSP line.
4. The apparatus of claim 3, wherein the forward module is specifically configured to:
determining the stratum depth and stratum speed of the WALKAWAY VSP line region according to geological data of the WALKAWAY VSP line region;
and carrying out seismic forward modeling on imaging data in the plumb line direction of the WALKAWAY VSP survey line according to the stratum depth and stratum speed of the WALKAWAY VSP survey line area.
5. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 1 to 2 when executing the computer program.
6. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, implements the method of any of claims 1 to 2.
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