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Model constraint based impedance inversion method and model constraint based impedance inversion system

A technology of inversion and modeling, applied in the field of petroleum geophysical exploration

Active Publication Date: 2013-09-11
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

Therefore, using these two techniques separately for the final restored impedance often suffers from the problem of choosing two sets of regularization strategies and experimenting with two sets of parameters

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  • Model constraint based impedance inversion method and model constraint based impedance inversion system
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  • Model constraint based impedance inversion method and model constraint based impedance inversion system

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[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0039] Seismic data interpolation and seismic impedance inversion belong to the two categories of seismic data processing and interpretation. These two steps are independent of each other and carried out in series. Due to the ill-posed problem of inversion, both the conventional seismic data interpolation method and the conventional impedance inversion method need to add regularization constraints. Independent realization of seismic data...

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Abstract

The invention provides a model constraint based impedance inversion method and a model constraint based impedance inversion system. The model constraint based impedance inversion method includes: acquiring log data, seismic data and acquisition matrixes of a current stratum; extracting seismic interpretation data from the seismic data; building an initial impedance model according to the log data and the seismic interpretation data; estimating seismic wavelets according to the log data and the seismic data; confirming objective function according to relationship between acoustic wave impedance and reflectance and sampling relationship when seismic traces are missing; confirming impedance sections or impedance objects of the current stratum according to the initial impedance model, estimated seismic wavelets and the objective function; and comprehensively interpreting the impedance sections and the impedance objects to acquire reservoir prediction results of the current stratum. Through model regularization, seismic data interpolation and seismic wave impedance inversion are combined organically, so that the seismic data interpolation and the seismic wave impedance inversion can be realized simultaneously.

Description

Technical field [0001] The invention relates to the technical field of petroleum geophysical exploration, especially to the inversion technology of seismic and logging data. Specifically, it is an impedance inversion method and system based on model constraints. Background technique [0002] In the field of petroleum geophysical exploration technology, seismic data interpolation is a necessary preprocessing link in the seismic data processing process. At present, there are mainly two types of methods that can realize seismic data interpolation. One type is a mathematical method based on signal recovery. This type of method uses the characteristics of seismic signals from the perspective of signal analysis, like the spatial continuity of the phase axis, to complete the interpolation of seismic data through signal reconstruction technology. Another type of method is based on the physical characteristics of the wave field propagating in the underground medium, and the seismic data i...

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Application Information

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IPC IPC(8): G01V1/28
Inventor 袁三一孙文举晏丰施佩东王尚旭
Owner BC P INC CHINA NAT PETROLEUM CORP
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