A method for inversion of reservoir shear wave impedance and density using converted shear wave seismic data

A technology for converting shear wave and seismic data, applied in the field of reservoir identification, it can solve the problems of multiple solutions of inversion of P-wave information, unable to obtain and identify the main rock elastic parameters of reservoir lithology effectively, etc., and achieve the final analysis of inversion parameters. The expression is concise and clear, the reservoir shear wave impedance and density parameters are accurate, and the effect is easy to popularize and apply.

Active Publication Date: 2017-12-19
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

Therefore, for ubiquitous lithologic oil and gas reservoirs, the AVO attributes from conventional P-wave seismic data are often unable to fully and effectively identify the main rock elastic parameters such as reservoir lithology and pore fluid, and P-wave information inversion often appears multiple problem solving

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  • A method for inversion of reservoir shear wave impedance and density using converted shear wave seismic data
  • A method for inversion of reservoir shear wave impedance and density using converted shear wave seismic data
  • A method for inversion of reservoir shear wave impedance and density using converted shear wave seismic data

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Embodiment Construction

[0031] Hereinafter, the method for inverting the shear wave impedance and density of a reservoir by using converted shear wave seismic data of the present invention will be described in detail with reference to exemplary embodiments.

[0032] In an exemplary embodiment of the present invention, the method for inverting shear wave impedance and density of a reservoir by using converted shear wave seismic data may include the following steps:

[0033] (1) Carry out two-dimensional multi-component or three-dimensional multi-component field exploration acquisition with methods known in the art to obtain multi-component data collected originally, and then process the acquired two-dimensional or three-dimensional converted shear wave seismic data to obtain capable Converted shear-wave prestack time-migrated gather data for inversion of reservoir shear-wave impedance and density parameters;

[0034] (2) Import the converted shear wave seismic data imaging gather processed by pre-stac...

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Abstract

The invention provides a method for inversing s-wave impedance and density parameters of a reservoir by using converted s-wave seismic data. By using converted the s-wave data, the s-wave impedance and density parameters of the reservoir can be directly inversed, so that more accurate reservoir lithology identification and reservoir hydrocarbon detection can be implemented. The method has the beneficial effects that the multiplicity and instability of a conventional longitudinal wave AVO (Amplitude Variation With Offset) analysis technology in a rock physical elastic parameter inversing method can be overcome; geophysical response characteristics of the reservoir, such as lithology, a density and the like, can be meticulously described; moreover, a generalized linear inversion method based on the least square solution is adopted, so that stability of an inversion algorithm is improved, calculation efficiency and inversion accuracy are improved.

Description

technical field [0001] The invention relates to geophysical prospecting technology, and more specifically, relates to a method for inverting reservoir shear wave impedance and density parameters and identifying reservoirs by using converted shear wave data. Background technique [0002] Usually, in seismic exploration, because there is a close relationship between the amplitude and the lithological properties of the formation, the amplitude variation with offset (AVO) analysis method can qualitatively and quantitatively explain the anomalies of formation properties, so AVO analysis technology has become a A technique widely used in reservoir prediction of oil and gas reservoirs. In the field of oil and gas exploration, AVO analysis technology based on P-wave prestack seismic data has been fully studied and widely used. [0003] However, in the P-wave AVO inversion method, due to the inherent characteristics of the P-wave reflection coefficient, it is often necessary to acqu...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30
CPCG01V1/303G01V1/306
Inventor 谢万学李德珍雷虹何光明陈丹王珑胡然彭文王玉华白静
Owner BC P INC CHINA NAT PETROLEUM CORP
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