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Fault identification method and device

A fault identification and layer leveling technology, applied in the field of oilfield exploration seismic data interpretation, can solve the problems of inconspicuous vertical dislocation of strike-slip faults and difficult identification of strike-slip faults in seismic data

Active Publication Date: 2017-09-08
PETROCHINA CO LTD
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Problems solved by technology

[0004] The inventors found that there are at least the following problems in the prior art: at present, for fracture-cavity carbonate oil and gas reservoirs, the internal faults are mainly strike-slip faults. Since the vertical dislocation of strike-slip faults is not obvious, the Some fault identification methods may make it difficult to effectively identify strike-slip faults through the coherence properties of seismic data

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Embodiment Construction

[0050] Embodiments of the present application provide a fault identification method and device.

[0051] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0052] figure 1 It is a flow chart of an embodiment of a fault identification method in the present application. Such as figure 1 As shown, the fault identification method includes the following steps.

[0053] Step S101: Acquire seismic ...

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Abstract

The present invention discloses a fault identification method and device. The method includes the following steps that: the seismic data of a target stratum are acquired; spectrum decomposition processing is performed on the seismic data according to a preset frequency interval and the frequency range of the seismic data; a plurality of kinds of seismic frequency division data are pre-processed, so that pre-processed seismic frequency division data are obtained; color fusion processing is performed on the seismic data of the target stratum on the basis of the pre-processed seismic frequency division data; and the location of a fault in the target stratum is identified on the basis of the seismic data which have been subjected to the color fusion processing. With the fault identification method and device of the invention adopted, the identification accuracy of the fault can be improved.

Description

technical field [0001] This application relates to the technical field of oilfield exploration seismic data interpretation, in particular to a fault identification method and device. Background technique [0002] The strong pressure and tension generated during the crustal movement exceed the strength of the rock layer itself, causing the rock layer to break. At the same time, the structural form formed by the relative movement of the rock blocks on both sides of the rock layer along the fracture surface can be called a fault. In the early stage of fault formation, diagenetic fluids flowed and dissolved along faults to form fractured cave reservoirs, which became oil and gas storage spaces. Later, oil and gas migrated vertically along faults and finally formed reservoirs. Faults and their surrounding areas are usually the main distribution areas of oil and gas, and are favorable targets for oil and gas exploration and well deployment. It can be seen that faults are insepara...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/30G01V2210/65
Inventor 宁超众徐兆辉姚子修李勇谭柱雷诚余义常方惠京
Owner PETROCHINA CO LTD
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