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A method and device for establishing a three-dimensional seismic observation system

An observation system and 3D seismic technology, applied in the field of geophysical exploration, can solve the problems of seismic data volume inhomogeneity, bin attribute inconsistency, high cost, etc., and achieve the effect of reducing exploration cost, increasing coverage density, and meeting requirements

Active Publication Date: 2018-02-02
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

The cost of such a high-density observation system is very high, and the second is that in the processing stage combined with previous seismic data processing, it may face the inconsistency of bin attributes resulting in the inhomogeneity of the seismic data volume, making it impossible to make full use of the previous seismic data. Beneficial effects of imaging

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  • A method and device for establishing a three-dimensional seismic observation system
  • A method and device for establishing a three-dimensional seismic observation system
  • A method and device for establishing a three-dimensional seismic observation system

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] The embodiment of the present invention provides a method for establishing a three-dimensional seismic observation system, such as figure 1 shown, including:

[0050] Step S101, conduct earthquake experiments in the area to be observed, and obtain seismic data;

[0051] Step S102, extracting the two-way reflection time of the target layer, the formation dip time difference, the stacking velocity and the signal-to-noise ratio of the original data accord...

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Abstract

The invention provides a method and device for establishing a three-dimensional seismic observation system. The method includes: conducting seismic experiments in the area to be observed, obtaining seismic data, extracting the two-way reflection time of the target layer, the time difference of the formation dip angle, the stacking speed and the signal-to-noise ratio of the original data ; Determine the bin size and maximum offset according to the two-way reflection time, formation dip time difference, stacking velocity and geological mission frequency; determine the effective coverage times according to the stacked profile SNR and original data SNR; Determine the experimental coverage density based on the cell size; determine the coverage density of the new 3D observation system based on the effective coverage density and experimental coverage density of previous 3D seismic data; Carry out harness division and establish a new 3D seismic observation system. The invention reduces the cost of exploration, implements high-density seismic exploration, and satisfies the need for high-density three-dimensional seismic exploration technology.

Description

technical field [0001] The invention relates to geophysical prospecting technology, in particular to a method and device for establishing a three-dimensional seismic observation system that effectively utilizes previous three-dimensional seismic data. Background technique [0002] Reservoirs with relatively simple structures have been discovered, confirmed and developed through conventional seismic exploration techniques. With the deepening of exploration and development, some oilfields have entered the stage of high-precision seismic exploration, requiring seismic exploration technology to be able to identify high-steep structures, complex fault blocks, low-amplitude structural traps, stratigraphic, lithologic traps, and subtle lithologic reservoirs Identification, prediction of oil and gas reservoirs and identification of fracture development zones, etc. To solve these seismic exploration problems, it is necessary to develop and apply high-density seismic exploration tech...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
Inventor 宁宏晓章多荣吴永国王海立王雷
Owner BC P INC CHINA NAT PETROLEUM CORP
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