CN115113279A - Adjoint marine seismic data combined acquisition system and method - Google Patents

Adjoint marine seismic data combined acquisition system and method Download PDF

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Publication number
CN115113279A
CN115113279A CN202210712909.4A CN202210712909A CN115113279A CN 115113279 A CN115113279 A CN 115113279A CN 202210712909 A CN202210712909 A CN 202210712909A CN 115113279 A CN115113279 A CN 115113279A
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China
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seismic data
geophysical prospecting
seismic
prospecting ship
floating
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CN202210712909.4A
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Chinese (zh)
Inventor
张宝金
刘玉萍
顾元
彭莉虹
边冬辉
彭科
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Guangzhou Marine Geological Survey
Southern Marine Science and Engineering Guangdong Laboratory Guangzhou
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Guangzhou Marine Geological Survey
Southern Marine Science and Engineering Guangdong Laboratory Guangzhou
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Priority to CN202210712909.4A priority Critical patent/CN115113279A/en
Publication of CN115113279A publication Critical patent/CN115113279A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/38—Seismology; Seismic or acoustic prospecting or detecting specially adapted for water-covered areas
    • G01V1/3808—Seismic data acquisition, e.g. survey design
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/38—Seismology; Seismic or acoustic prospecting or detecting specially adapted for water-covered areas
    • G01V1/3843—Deployment of seismic devices, e.g. of streamers
    • 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
    • Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/30—Assessment of water resources

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  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Oceanography (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

The application relates to a companion marine seismic data joint acquisition system, including: the seismic prospecting system comprises a geophysical prospecting ship, a seismic source, N towing cables and M floating seismographs, wherein N and M are integers larger than zero; the seismic source is arranged below the geophysical prospecting ship and is connected with the geophysical prospecting ship through a cable guide; the towing cables are arranged at the tail part of the geophysical prospecting ship, each towing cable is provided with a wave detector, and the wave detectors are in communication connection with the geophysical prospecting ship; the floating seismograph floats on the sea surface of a preset detection point and is in communication connection with the geophysical prospecting ship. The adjoint marine seismic data combined acquisition system can form clear stratum imaging, and meanwhile can reduce the comprehensive setting cost of marine seismic data acquisition equipment.

Description

Adjoint marine seismic data combined acquisition system and method
Technical Field
The application relates to the technical field of marine seismic exploration, in particular to a concomitant marine seismic data joint acquisition system and method.
Background
With the increasingly prominent importance of resources such as natural gas hydrates, marine oil and gas and the like, strategic deployment to the deep army of the earth is implemented gradually, and marine seismic exploration plays an important role in the aspects of marine research and development, wherein the method for acquiring marine deep seismic information is a technical foundation.
At present, marine seismic exploration mainly comprises two modes, namely marine streamer seismic and ocean bottom seismic. Both use a geophysical vessel to excite the seismic source in the water, with the difference that the streamers' geophones are enclosed in streamers that float in the water, while the ocean bottom seismometer has geophones arranged in some fashion on the ocean bottom. In addition, in the aspect of marine seismic monitoring, floating seismographs are researched and developed by domestic and foreign institutions, are suspended in seawater at a certain depth, and can record natural seismic signals for a long time in a large range along with ocean current movement. The marine streamer seismic acquisition has the characteristics of low cost, high efficiency and short period, has higher imaging resolution ratio on the stratums in the middle and shallow parts, but has poor imaging effect in a region with complex geological structure because the length of the streamer is limited, and reflected wave signals of a deep and steep structure are difficult to receive. The ocean bottom seismograph can reveal the stratum velocity information of a deeper part, but the instrument cost and the construction cost are huge, a large amount of throwing can not be realized frequently, and the imaging resolution ratio of a shallow part stratum is not high. How to combine the advantages of streamer seismic and seismographs is a significant challenge for marine seismic information acquisition.
Disclosure of Invention
In order to overcome the problems in the related art, the accompanying marine seismic data combined acquisition system can form clear stratum imaging and reduce the comprehensive setting cost of marine seismic data acquisition equipment.
The present application provides in a first aspect a companion marine seismic data joint acquisition system comprising:
the seismic prospecting system comprises a geophysical prospecting ship, a seismic source, N towing cables and M floating seismographs, wherein N and M are integers larger than zero;
the seismic source is arranged below the geophysical prospecting ship and is connected with the geophysical prospecting ship through a cable guide;
the towing cables are arranged at the tail part of the geophysical prospecting ship, each towing cable is provided with a wave detector, and the wave detectors are in communication connection with the geophysical prospecting ship;
the floating seismograph floats on the sea surface of a preset detection point and is in communication connection with the geophysical prospecting ship.
In one embodiment, a navigation positioning device is arranged in the floating seismograph, and the geophysical prospecting ship can obtain positioning information of the floating seismograph.
In one embodiment, M of the predetermined probe points are distributed in a target probe area of a seismic survey work area.
In one embodiment, a skeg is arranged at the tail of the geophysical prospecting ship, and N towing points are arranged on the skeg and are respectively connected with the N towing cables.
A second aspect of the present application provides a joint acquisition method for concomitant marine seismic data, including:
after the geophysical prospecting ship arrives at a seismic survey work area, arranging seismic sources, N towing cables and M floating seismographs;
the geophysical prospecting ship runs according to a preset air route and excites the seismic source;
the geophysical prospecting ship respectively acquires shallow seismic data fed back by a detector in the towing cable and deep seismic data fed back by the floating seismograph;
and the geophysical prospecting ship carries out data analysis of the seismic surveying work area according to the shallow seismic data and the deep seismic data.
In one embodiment, the geophysical vessel performing data analysis of a seismic survey work area from the shallow seismic data and the deep seismic data comprises:
and carrying out velocity modeling on the propagation velocity of the seismic waves according to the shallow seismic data and the deep seismic data, and obtaining formation imaging from shallow to deep by using a velocity tomography imaging method.
The technical scheme provided by the application can comprise the following beneficial effects:
the embodiment of the application adopts the adjoint marine seismic data combined acquisition system, and shallow seismic data and deep seismic data in a measurement work area can be synchronously acquired. Compared with single-towing-cable seismic acquisition or seismograph acquisition, the scheme of the embodiment of the application can obtain clearer stratum imaging from shallow to deep, and is more time-saving and labor-saving compared with single-mode acquisition; in addition, compared with a combined acquisition mode of the ocean bottom seismograph and the towline, the floating seismograph is more convenient to release and recover, and the comprehensive setting cost of the marine seismic data acquisition equipment is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the application.
FIG. 1 is a schematic structural diagram of a joint acquisition system for accompanying marine seismic data shown in an embodiment of the present application;
FIG. 2 is a schematic flow chart diagram of a concomitant marine seismic data joint acquisition method shown in an embodiment of the application.
Detailed Description
Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Example one
In the field of marine seismic exploration, data of streamer earthquakes and ocean bottom seismographs are synchronously acquired at present, the ocean bottom seismographs are generally arranged below a measuring line of a plurality of earthquakes of the streamer, but the ocean bottom seismographs are difficult to arrange and recover, easy to lose and high in cost. Therefore, there is still room for improvement in the method of streamer and ocean bottom seismograph joint acquisition.
In view of the above problems, the present application provides a companion marine seismic data joint acquisition system, which can reduce the comprehensive setup cost of marine seismic data acquisition equipment while forming clear stratigraphic images.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a joint acquisition system for concomitant marine seismic data according to an embodiment of the present application.
The present application in an embodiment of the present application provides a joint acquisition system for companion marine seismic data, comprising: the seismic prospecting system comprises a geophysical prospecting ship, a seismic source, N towing cables and M floating seismographs, wherein N and M are integers larger than zero;
the seismic source is arranged below the geophysical prospecting ship and is connected with the geophysical prospecting ship through a cable guide;
the towing cables are arranged at the tail of the geophysical prospecting ship, each towing cable is provided with a detector, and the detectors are in communication connection with the geophysical prospecting ship (for example, the tail of the geophysical prospecting ship can be provided with a skeg, and the skeg is provided with N towing points which are respectively connected with the N towing cables).
The floating seismograph floats on the sea surface of a preset detection point and is in communication connection with the geophysical prospecting ship.
In practical applications, a plurality of streamers (i.e., N is greater than one) may be provided according to actual exploration requirements, and is not limited herein.
In practical applications, the number of the floating seismographs (i.e., the value of M) depends on the size of the seismic survey area, and is not limited herein. In addition, the arrangement mode of the floating seismograph (i.e. the distribution mode of the preset detection points) requires that the geophysical prospecting ship does not influence on the preset route, and besides, the number of the preset detection points can also be determined according to the size of the earthquake measurement work area and the detection requirements, and is not limited here. Illustratively, the M preset detection points are uniformly distributed around the seismic survey work area.
In practical application, the floating seismographs are provided with navigation positioning devices, and the geophysical prospecting ship can obtain positioning information of the floating seismographs, so that the geophysical prospecting ship can calculate corresponding data according to the positioning information of each floating seismograph, and speed modeling is completed. It should be noted that the "velocity" mentioned in the embodiments of the present application refers to the propagation velocity of the seismic wave.
The embodiment of the application adopts the adjoint marine seismic data combined acquisition system, and can synchronously acquire shallow seismic data and deep seismic data in a measurement work area. Compared with single-towing-cable seismic acquisition or seismograph acquisition, the scheme of the embodiment of the application can obtain clearer stratum imaging from shallow to deep, and is more time-saving and labor-saving compared with single-mode acquisition; in addition, compared with a combined acquisition mode of the ocean bottom seismograph and the towing cable, the floating seismograph is convenient to release and recover, and the comprehensive setting cost of the marine seismic data acquisition equipment is reduced.
Example two
The embodiment of the present application further provides a concomitant marine seismic data joint acquisition method executed by the above-mentioned concomitant marine seismic data joint acquisition system, please refer to fig. 2, which includes:
201. after the geophysical prospecting ship arrives at a seismic survey work area, arranging seismic sources, towing cables and floating seismographs;
in practical application, after a geophysical prospecting ship arrives at a seismic survey work area, a seismic source, N towing cables and M floating seismographs are arranged, wherein N and M are integers which are larger than zero.
In practical applications, a plurality of streamers (i.e., N is greater than one) may be provided according to actual exploration requirements, and is not limited herein. The number of floating seismographs (i.e., the value of M) is determined according to the size of the seismic survey area, and is not particularly limited herein. In addition, the arrangement mode of the floating seismograph (i.e. the distribution mode of the preset detection points) requires that the geophysical prospecting ship does not influence on the preset route, and in addition, the number of the preset detection points can also be determined according to the size of the earthquake measurement work area and the detection requirements, and is not limited specifically here. Illustratively, M of the preset probe points are distributed in a target probe area of a seismic survey work area.
202. The geophysical prospecting ship runs according to a preset air route and excites the seismic source;
after the seismic source, the towing cable and the floating seismograph are arranged, the geophysical prospecting ship can run according to a preset air route and excite the seismic source.
203. The geophysical prospecting ship respectively acquires shallow seismic data fed back by the detector in the towing cable and deep seismic data fed back by the floating seismograph;
when the seismic source is excited, the detector in the streamer can detect shallow seismic data, and the floating seismograph can detect deep seismic data.
In the shallow seismic data and the deep seismic data described in the embodiments of the present application, "shallow" and "deep" are relative concepts, and it is not determined how many meters below sea level are "shallow" and how many meters are "deep". For example, the shallow seismic data and the deep seismic data referred to in the embodiments of the present application are bounded by 8000 m.
204. And the geophysical prospecting ship carries out data analysis of the seismic surveying work area according to the shallow seismic data and the deep seismic data.
In an exemplary embodiment, the geophysical prospecting ship can perform velocity modeling of the propagation velocity of the seismic waves according to the shallow seismic data and the deep seismic data, and obtain formation imaging from shallow to deep by using a velocity tomography imaging method.
The aspects of the present application have been described in detail hereinabove with reference to the accompanying drawings. In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments. Those skilled in the art should also appreciate that the acts and modules referred to in the specification are not necessarily required in the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application may be sequentially adjusted, combined, and deleted according to actual needs, and the modules in the device of the embodiment of the present application may be combined, divided, and deleted according to actual needs.
Furthermore, the method according to the present application may also be implemented as a computer program or computer program product comprising computer program code instructions for performing some or all of the steps of the above-described method of the present application.
Alternatively, the present application may also be embodied as a non-transitory machine-readable storage medium (or computer-readable storage medium, or machine-readable storage medium) having stored thereon executable code (or a computer program, or computer instruction code) which, when executed by a processor of an electronic device (or electronic device, server, etc.), causes the processor to perform part or all of the various steps of the above-described method according to the present application.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the applications disclosed herein may be implemented as electronic hardware, computer software, or combinations of both.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems and methods according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The foregoing description of the embodiments of the present application has been presented for purposes of illustration and description and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (6)

1. A joint acquisition system for companion marine seismic data, comprising: the seismic prospecting system comprises a geophysical prospecting ship, a seismic source, N towing cables and M floating seismographs, wherein N and M are integers larger than zero;
the seismic source is arranged below the geophysical prospecting ship and is connected with the geophysical prospecting ship through a guide cable;
the towing cables are arranged at the tail part of the geophysical prospecting ship, each towing cable is provided with a wave detector, and the wave detectors are in communication connection with the geophysical prospecting ship;
the floating seismograph floats on the sea surface of a preset detection point and is in communication connection with the geophysical prospecting ship.
2. The adjoint marine seismic data combined acquisition system of claim 1, wherein a navigation positioning device is provided in the floating seismograph, and the geophysical prospecting ship can obtain positioning information of the floating seismograph.
3. The joint acquisition system of concomitant marine seismic data according to claim 1,
and M preset detection points are distributed in a target detection area of the seismic survey work area.
4. The joint acquisition system of concomitant marine seismic data according to claim 1,
the tail of the geophysical prospecting ship is provided with a skeg, and the skeg is provided with N towing points which are respectively connected with the N towing cables.
5. A joint acquisition method of concomitant marine seismic data, performed in the joint acquisition system of concomitant marine seismic data of any one of claims 1 to 4, comprising:
after the geophysical prospecting ship arrives at a seismic survey work area, laying seismic sources, N towing cables and M floating seismographs, wherein N and M are integers larger than zero;
the geophysical prospecting ship runs according to a preset air route and excites the seismic source;
the geophysical prospecting ship respectively acquires shallow seismic data fed back by a detector in the towing cable and deep seismic data fed back by the floating seismograph;
and the geophysical prospecting ship carries out data analysis of the seismic surveying work area according to the shallow seismic data and the deep seismic data.
6. The companion marine seismic data joint acquisition system of claim 5 wherein the geophysical vessel performs data analysis of the seismic survey workspace from the shallow seismic data and the deep seismic data, comprising:
and carrying out velocity modeling on the propagation velocity of the seismic waves according to the shallow seismic data and the deep seismic data, and obtaining formation imaging from shallow to deep by using an imaging method of velocity tomography.
CN202210712909.4A 2022-06-22 2022-06-22 Adjoint marine seismic data combined acquisition system and method Pending CN115113279A (en)

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CN202210712909.4A CN115113279A (en) 2022-06-22 2022-06-22 Adjoint marine seismic data combined acquisition system and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210712909.4A CN115113279A (en) 2022-06-22 2022-06-22 Adjoint marine seismic data combined acquisition system and method

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CN115113279A true CN115113279A (en) 2022-09-27

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