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Method and device of determining low frequency wave impedance

A wave impedance and low frequency technology, which is applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of low accuracy of low frequency wave impedance model, no solution proposed, difficulty in establishing low frequency wave impedance model, etc., so as to improve the accuracy , improve the rationality, the effect of high lateral resolution

Active Publication Date: 2016-03-23
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

However, under complex geological conditions, the accuracy of the low-frequency wave impedance model established in this way is not high
[0005] For the above-mentioned technical problems that it is difficult to establish an accurate low-frequency wave impedance model, no effective solution has been proposed so far

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  • Method and device of determining low frequency wave impedance
  • Method and device of determining low frequency wave impedance
  • Method and device of determining low frequency wave impedance

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Embodiment Construction

[0025] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. Here, the exemplary embodiments of the present invention and the description thereof are used to explain the present invention, but not as a limitation to the present invention.

[0026] Taking into account the technical problems that it is difficult to establish an accurate low-frequency impedance model in the existing technology, technologies such as log impedance curve analysis, low-frequency seismic data spectrum analysis, low-frequency impedance compensation processing, log curve and low-frequency seismic impedance fusion calculation are introduced. , Fully integrate drilling, geological and seismic information to obtain a more accurate low-frequency impedance model. Specifically, in this example, a method for determining low-frequency wave impedance ...

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Abstract

The invention provides a method and device of determining low frequency wave impedance, wherein the method comprises: obtaining a logging low frequency wave impedance model and an earthquake data low frequency wave impedance model; comparing and analyzing two models according to frequency ranges to obtain a compensation coefficient and perform compensation; and fusing models of different frequency ranges to obtain a fused low frequency wave impedance model. According to the embodiment of the invention, a finally obtained low frequency wave impedance model with logging and earthquake information fully combines well boring, geology and earthquake information, and accordingly has a higher transverse resolution. The method solves the technical problem of inaccuracy of a low frequency wave impedance model built by the prior art, effectively improves the accuracy of the low frequency wave impedance model, and further improves the lithology prediction accuracy of the wave impedance inversion technology.

Description

Technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a method and device for determining low-frequency wave impedance. Background technique [0002] In recent years, with the continuous in-depth research on lithological oil and gas reservoirs, how to accurately predict complex lithology has become the focus of attention. [0003] In the process of predicting complex lithology, seismic inversion technology has played an important role. From the seismic data used in seismic inversion, seismic inversion can be divided into: pre-stack inversion and post-stack inversion; from the seismic information used in inversion, seismic inversion can be divided into: seismic wave travel time inversion From the inversion of geological results, it can be divided into: structure inversion, wave impedance inversion, reservoir parameter inversion, geostatistical inversion, etc. [0004] At present, the commonly used seismic inversion software ma...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/6226
Inventor 岳跃龙陈洪涛李玉海李冰玲杨峰曾凡平
Owner BC P INC CHINA NAT PETROLEUM CORP
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