Phase-controlled earthquake inversion method in geophysical exploration

A technology for geophysical exploration and seismic inversion, applied in the field of petroleum geophysical exploration, can solve the problems of not taking into account the spatial variation of geological bodies, inability to identify thin reservoirs, and describe the false boundary of sand bodies, etc., and improve data resolution. , Improve the recognition ability, improve the effect of resolution

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0006] The existing model-based seismic inversion technology and seismic facies analysis technology have their own defects: the model-based seismic inversion technology only uses the seismic interpretation horizon as the constrained layer in the modeling process, and the properties of the logging curve along the horizon The spatial interpolation and extrapolation did not take into account the spatial variation of the geological body. Although the vertical resolution o

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  • Phase-controlled earthquake inversion method in geophysical exploration
  • Phase-controlled earthquake inversion method in geophysical exploration
  • Phase-controlled earthquake inversion method in geophysical exploration

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Embodiment Construction

[0036] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0037] The invention aims at the problem of seismic inversion under the control of seismic phase in logging-constrained seismic inversion, uses geophysical data and seismic phase data to jointly perform seismic inversion, and can be applied to reservoir fine description in petroleum geophysical exploration.

[0038] Such as Figure 5 Shown, the inventive method comprises:

[0039] ① Interpret and track multiple sets of reflection horizons for seismic data, check and modify the quality of the interpretation horizons, and perform full three-dimensional tracking and interpretation of the horizons to make the horizon interpretation results more refined, so that each earthquake has a fine layer interpretation results. It is used as the input data in seismic facies analysis and seismic inversion, especially some unconformities and standard reflection layers need to be int...

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Abstract

The invention provides a phase-controlled earthquake inversion method in geophysical exploration, and belongs to the field of petroleum geophysical prospection. The method comprises the following steps: obtaining a three-dimensional surge impedance data volume step from inversion of original earthquake data; conducting phase control on the earthquake inversion step. The method utilizes earthquake data and a logging surge impedance curve to conduct inversion to obtain surge impedance data of a reservoir stratum under the control of result of an earthquake phase and a geologic phase, can maintain horizontal resolution while improving vertical resolution, and can finely depict space spreading and distributing form of the reservoir stratum.

Description

technical field [0001] The invention belongs to the field of petroleum geophysical exploration, and in particular relates to a phase-controlled seismic inversion method in geophysical exploration. Background technique [0002] In petroleum exploration and development, the main task in the exploration stage is to find some large traps for the structures and fault-block oil and gas reservoirs that are easy to be found. With the in-depth development of oilfields, the old oilfields have gradually shifted from the exploration stage to the development stage, and the research target has also shifted to lithologic reservoirs dominated by lithological factors. On the whole, they have developed from the discovery of structural reservoirs to lithologic reservoirs. [0003] At the stage of lithology exploration, how to fully apply the rich information contained in various geophysical data to analyze the development of underground formations, and then identify the spatial changes of rese...

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Application Information

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IPC IPC(8): G01V1/28G01V1/30
Inventor 孙振涛魏三妹徐佳陈勇
Owner CHINA PETROLEUM & CHEM CORP
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