Reservoir Wave Impedance Inversion Method and Device for Thrust Nappe Zone

Abstract

The invention provides a thrust crawler reservoir wave impedance inverting method and a thrust crawler reservoir wave impedance inverting device. The method comprises the following steps that the fault attribute of a thrust fault is converted into the layer position attribute and is merged with the stratigraphic layer position; an upper disc and a lower disc of the merged thrust fault respectively build an initial impedance model; the upper and lower discs of the thrust fault are subjected to wave impedance inversion on the basis of the corresponding initial impedance model, and the inversion results of the upper and lower discs of the thrust fault are obtained; the inversion results of the upper and lower discs of the thrust fault are subjected to data volume addition and are merged into thrust crawler inversion results. The method and the device provided by the invention have the advantages that the mold building accuracy is ensured, the mold building precision is also improved, and solid foundation is laid for the predication and the evaluation of a subsequent thrust crawler reservoir.

Description

technical field [0001] The invention relates to reservoir modeling and seismic inversion technology in a thrust nappe zone, in particular to a wave impedance inversion method and device for a thrust nappe zone reservoir. Background technique [0002] In recent years, with the development of petroleum exploration technology, the field of exploration has been continuously expanded, and oil and gas exploration has developed from conventional clastic rock reservoirs to special reservoirs, and ancient buried hill reservoirs are one of them. The thrust nappe belt is a structure composed of thrust faults and their hanging wall nappes or thrust sheets, and is widely developed in ancient buried hills. When the nappe on the upper wall of the thrust fault in the ancient buried hill is subjected to weathering and denudation to different degrees, and an unconformity surface appears and directly covers the thrust nappe belt, an ancient buried hill related to the unconformity shielding or ...

AI Technical Summary

Problems solved by technology

Although there are faults separating the upper and lower walls of the thrust fault, when the layers overlap seriously, the system may mistake the hanging wall layers and footwall layers as layers of the same wall of the thrust fault for modeling and thus In addition, when the layers overlap seriously, it will lead to interpolation blind areas at the contact positions of the upper and lower walls and the thrust fault; therefore, when the layers overlap seriously, the accuracy of the wave impedance inversion of the second method above also difficult to guarantee

[0005] To sum up, the accuracy of existing wave impedance inversion methods for thrust nappe zone reservoirs is not high

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