CN112485828A - Method and device for acquiring transverse wave seismic section - Google Patents
Method and device for acquiring transverse wave seismic section Download PDFInfo
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- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
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Abstract
The invention discloses a method and a device for acquiring a transverse wave seismic section, wherein the method comprises the following steps: acquiring seismic data of a preset two-dimensional work area, wherein the seismic data comprise SH wave data and SV wave data; respectively arranging different types of seismic data on a main survey line and a connecting line of a preset two-dimensional work area survey line; and carrying out data processing on the seismic data to obtain a transverse wave stacking section. The invention can ensure that the transverse wave vibration directions of the main measuring line and the connecting line at the intersection point are the same, and ensure that the main measuring line and the connecting line are closed, thereby ensuring that the subsequent seismic data interpretation work can be smoothly carried out.
Description
Technical Field
The invention relates to the technical field of oil-gas exploration, in particular to a method and a device for acquiring a transverse wave seismic section.
Background
In oil and gas exploration operation, because the propagation velocity of the transverse wave is only influenced by a rock framework, the propagation velocity of the transverse wave is not influenced by fluid in a stratum, and particularly when the fluid in the stratum is gas, the transverse wave reflection can accurately reflect an underground structure and meet the requirements of accurately describing the underground structure and explaining a thin interbed reservoir, so that the acquisition of a transverse wave seismic profile is very important for accurately identifying a structural gas reservoir.
In the prior art, when a transverse wave seismic section is obtained, two-dimensional transverse wave data are generally collected and then processed, so that the transverse wave seismic section is obtained. Wherein, the two-dimensional transverse wave data collected are SH waves or SV waves of the same type. SH waves refer to waves in which particle vibration occurs in a plane parallel to the wave propagation plane, and SV waves refer to waves in which particle vibration occurs in a plane perpendicular to the wave propagation plane. Because the two-dimensional transverse wave data acquired in the prior art are SH waves or SV waves of the same type, in practical application, the SH waves or SV waves are not closed at the intersection points of the main measuring line and the connecting line in the two-dimensional work area measuring line coordinate (namely the transverse wave vibration directions of the main measuring line and the connecting line at the intersection points are different, specifically refer to the attached drawing 3), the subsequent seismic data interpretation work is seriously influenced, and the large-scale application of the transverse wave exploration technology is restricted.
Disclosure of Invention
The embodiment of the invention provides a method for acquiring a transverse wave seismic section, which is used for solving the problem that SH waves or SV waves are not closed at the intersection point of a main measuring line and a connecting line in a two-dimensional work area, and comprises the following steps:
acquiring seismic data of a preset two-dimensional work area, wherein the seismic data comprise SH wave data and SV wave data;
respectively arranging different types of seismic data on a main survey line and a connecting line in preset two-dimensional work area survey lines;
and carrying out data processing on the seismic data to obtain a transverse wave stacking section.
Optionally, different types of seismic data are respectively arranged on a main survey line and a tie line in a preset two-dimensional work area survey line, including:
SH wave data is distributed on the main survey line, and SV wave data is distributed on the interconnection line.
Optionally, different types of seismic data are respectively arranged on a main survey line and a tie line in a preset two-dimensional work area survey line, including:
SV wave data is laid on the main survey line, and SH wave data is laid on the interconnection line.
Optionally, the data processing is performed on the seismic data to obtain a transverse wave stacking section, and the method includes:
performing seismic data processing on the SH wave data and the SV wave data;
and converting the processed SH wave data and SV wave data into profile data to obtain a transverse wave superposition profile.
The embodiment of the invention also provides a transverse wave seismic section acquisition device, which is used for solving the problem that the SH wave or SV wave is not closed at the intersection point of the main survey line and the connecting line in the survey line of the two-dimensional work area, and comprises the following components:
the data acquisition module is used for acquiring seismic data of a preset two-dimensional work area, wherein the seismic data comprise SH wave data and SV wave data;
the classification module is used for respectively arranging the seismic data of different types on a main survey line and a connecting line in preset two-dimensional work area survey lines;
and the data processing module is used for carrying out data processing on the seismic data and acquiring a transverse wave stacking section.
Optionally, the classification module is further configured to:
SH wave data is distributed on the main survey line, and SV wave data is distributed on the interconnection line.
Optionally, the classification module is further configured to:
SV wave data is laid on the main survey line, and SH wave data is laid on the interconnection line.
Optionally, the data processing module is further configured to:
correcting the SH wave data and the SV wave data;
and converting the processed SH wave data and SV wave data into profile data to obtain a transverse wave superposition profile.
The embodiment of the present invention further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the method when executing the computer program.
An embodiment of the present invention further provides a computer-readable storage medium, in which a computer program for executing the above method is stored.
In the embodiment of the invention, by acquiring the seismic data of the preset two-dimensional work area, wherein the seismic data comprises SH wave data and SV wave data, and respectively arranging different types of seismic data on the main survey line and the tie line in the survey lines of the preset two-dimensional work area, the same transverse wave vibration directions of the main survey line and the tie line at the intersection point are ensured, the main survey line and the tie line can be ensured to be closed, the subsequent seismic data interpretation work can be smoothly carried out, and the transverse wave exploration technology can be applied in a large scale. By carrying out data processing on the seismic data, the following smooth acquisition of the transverse wave stacking section is ensured, and the structural gas reservoir is accurately identified.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
FIG. 1 is a schematic flow chart of a method for acquiring a shear wave seismic section according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a shear wave seismic profile acquisition apparatus according to an embodiment of the present invention;
FIG. 3 is an exemplary diagram of a two-dimensional work area survey line construction of the prior art;
FIG. 4 is an exemplary diagram of two-dimensional work area survey line construction in an embodiment of the present disclosure;
FIG. 5 is a close-up differential diagram of a predetermined two-dimensional work area in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
In order to solve the problem that the orthogonal shear wave survey line is not closed, the embodiment of the invention provides a shear wave seismic section acquisition method, as shown in the attached drawing 1, the method comprises the following steps:
And 102, respectively arranging the seismic data of different types on a main survey line and a connecting line in preset two-dimensional work area survey lines.
In this embodiment, SH wave data may be arranged on the master line, and SV wave data may be arranged on the interconnection line.
The SV wave data may also be laid on the main survey line and the SH wave data may be laid on the interconnection line, as shown in fig. 4.
And 103, carrying out data processing on the seismic data to obtain a transverse wave stacking section.
In this embodiment, step 103 includes: performing seismic data processing on the SH wave data and the SV wave data;
and converting the SH wave data and the SV wave data after processing into profile data, and closing the obtained SV shear wave superposition profile and the SH shear wave superposition profile.
As can be seen from fig. 1, in the method for acquiring a transverse wave seismic section provided in the embodiment of the present invention, by acquiring seismic data of a preset two-dimensional work area, where the seismic data includes SH wave data and SV wave data, and arranging different types of the seismic data on a main survey line and a tie line in a survey line coordinate of the preset two-dimensional work area, it is ensured that the transverse wave vibration directions of the main survey line and the tie line at an intersection point are the same, and it is ensured that the main survey line and the tie line can be closed, so that subsequent seismic data interpretation work can be smoothly performed, and a transverse wave exploration technology can be applied in a large scale. By carrying out data processing on the seismic data, the following smooth acquisition of the transverse wave stacking section is ensured, and the structural gas reservoir is accurately identified.
It should be noted that when seismic waves propagate in an anisotropic medium, the phase velocity in each direction is different and different. Taking VTI medium as an example, we use it to illustrate the phase velocity variation of the transverse waves in different directions.
Defining the X-axis as the axis of symmetry, using the phase angle (n) relative to the axis of symmetry1Sin θ and n3Cos θ) represents a unit vector n, C55 and C66 represent stiffness coefficients, ρ represents density, and the phase velocity of the SH wave can be obtained:
when θ is 0 °, the SH wave line direction is the X-axis direction, and its speed is:
when θ is 90 °, the SH wave line direction is the Y-axis direction, and its speed is:
as can be seen from equations (2) and (3), the two shear SH wave lines are orthogonal, the direction of the vibration vector of the seismic source is vertical, and the velocities of the two shear SH wave lines are different, so that the problem of orthogonal SH wave line closure difference is caused.
Meanwhile, when θ is 0 °, the phase velocity of the SV wave is:
in this case, the SV wave line direction is along the Y-axis direction. It can be seen from equations (2) and (4) that the vibration directions of the two seismic sources are consistent and the velocities are the same. According to the theoretical analysis, in the field construction process, the direction of the vibration vector of the shear wave seismic source is kept consistent in the same two-dimensional measuring net, so that the velocity of the shear wave at the intersection point is approximately the same, and the problem of poor closure of the two-dimensional transverse wave measuring line can be solved.
FIG. 5 shows the cross wave data actually collected in the predetermined two-dimensional work area, where the measurement line 1 is SH wave and the measurement line 3 is SV wave. By using the invention, SH waves or SV waves of the same type in the same two-dimensional measuring net are changed into SH waves and SV waves, the direction of the vibration vector of the seismic source of the SV wave measuring line in the X direction is consistent with that of the SH wave measuring line in the Y direction, the transverse wave measuring lines in the two directions can be closed well, and the wave group characteristics are approximately the same.
Based on the same inventive concept, the embodiment of the invention also provides a transverse wave seismic section acquisition device, as described in the following embodiments. Because the principle of the transverse wave seismic profile acquisition device for solving the problems is similar to that of the transverse wave seismic profile acquisition method, the implementation of the transverse wave seismic profile acquisition device can refer to the implementation of the transverse wave seismic profile acquisition method, and repeated parts are not described again. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
The embodiment of the invention provides a transverse wave seismic section acquisition device, which comprises the following components as shown in the attached figure 2:
the data acquisition module 201 is configured to acquire seismic data of a preset two-dimensional work area, where the seismic data includes SH wave data and SV wave data.
And the classification module 202 is used for respectively arranging the seismic data of different types on a main survey line and a connecting line in the preset two-dimensional work area survey lines.
And the data processing module 203 is used for performing data processing on the seismic data to obtain a transverse wave stacking section.
In an embodiment of the present invention, the classification module 202 is further configured to:
SH wave data is distributed on the main survey line, and SV wave data is distributed on the interconnection line.
In an embodiment of the present invention, the classification module 202 is further configured to:
SV wave data is laid on the main survey line, and SH wave data is laid on the interconnection line.
In this embodiment of the present invention, the data processing module 203 is further configured to:
correcting the SH wave data and the SV wave data;
and converting the corrected SH wave data and SV wave data into profile data to obtain a transverse wave superposition profile.
The embodiment of the present invention further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the above method when executing the computer program.
An embodiment of the present invention further provides a computer-readable storage medium, in which a computer program for executing the above method is stored.
As will be appreciated by one skilled in the art, 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for acquiring a shear wave seismic profile, comprising:
acquiring seismic data of a preset two-dimensional work area, wherein the seismic data comprise SH wave data and SV wave data;
respectively arranging different types of seismic data on a main survey line and a connecting line of a preset two-dimensional work area survey line;
and carrying out data processing on the seismic data to obtain a transverse wave stacking section.
2. The method of claim 1, wherein the arranging different types of seismic data on a main line and a crossline of a predetermined two-dimensional work area line respectively comprises:
SH wave data is distributed on the main survey line, and SV wave data is distributed on the interconnection line.
3. The method of claim 1, wherein the arranging different types of seismic data on a main line and a crossline of a predetermined two-dimensional work area line respectively comprises:
SV wave data is laid on the main survey line, and SH wave data is laid on the interconnection line.
4. The method of claim 1, wherein the data processing of the seismic data to obtain shear stacking profiles comprises:
performing seismic data processing on the SH wave data and the SV wave data;
and converting the processed SH wave data and SV wave data into profile data to obtain a transverse wave superposition profile.
5. A shear wave seismic profile acquisition apparatus, comprising:
the data acquisition module is used for acquiring seismic data of a preset two-dimensional work area, wherein the seismic data comprise SH wave data and SV wave data;
the classification module is used for respectively arranging the seismic data of different types on a main survey line and a connecting line of a preset two-dimensional work area survey line;
and the data processing module is used for carrying out data processing on the seismic data and acquiring a transverse wave stacking section.
6. The apparatus of claim 5, wherein the classification module is further to:
SH wave data is distributed on the main survey line, and SV wave data is distributed on the interconnection line.
7. The apparatus of claim 5, wherein the classification module is further to:
SV wave data is laid on the main survey line, and SH wave data is laid on the interconnection line.
8. The apparatus of claim 5, wherein the data processing module is further to:
performing seismic data processing on the SH wave data and the SV wave data;
and converting the corrected SH wave data and SV wave data into profile data to obtain a transverse wave superposition profile.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 4 when executing the computer program.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the method of any one of claims 1 to 4.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034068A (en) * | 1987-10-14 | 1989-07-19 | 阿莫科公司 | Geophysical exploration method |
| US8040754B1 (en) * | 2010-08-27 | 2011-10-18 | Board Of Regents Of The University Of Texas System | System and method for acquisition and processing of elastic wavefield seismic data |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034068A (en) * | 1987-10-14 | 1989-07-19 | 阿莫科公司 | Geophysical exploration method |
| US8040754B1 (en) * | 2010-08-27 | 2011-10-18 | Board Of Regents Of The University Of Texas System | System and method for acquisition and processing of elastic wavefield seismic data |
Non-Patent Citations (3)
| Title |
|---|
| WU WEIWEI等: "An analysis of the SH-wave 2D section closure error problem and the countermeasures", SEG TECHNICAL PROGRAM EXPANDED ABSTRACTS 2019, pages 238 - 241 * |
| 保尔什科夫;吕仲林;卢晓林;: "纵波和横波在反射地震勘探中的联合使用", 勘探地球物理进展, no. 01 * |
| 王海立等: "横波偏振方向与交点闭合分析", 中国地球科学联合学术年会 2020 * |
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