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A method and device for predicting the distribution of carbonate fault fracture zones

A carbonate rock and prediction method technology, applied in the field of geological exploration, can solve problems such as wave group instability, amplitude weakening, and large waveform changes, and achieve the effect of fast and convenient identification and accurate prediction

Active Publication Date: 2021-06-01
PETROCHINA CO LTD
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Problems solved by technology

Among them, the inner belt and the fault core are usually connected as a whole, and the chaotic weak amplitude area usually shows weak amplitude in the seismic data, the wave group is unstable, the waveform changes greatly, the event changes suddenly, twists and bifurcates; the outer belt is in the seismic section. It usually shows the characteristics of weakened amplitude and reduced frequency, and has a gradual relationship with the inner zone and surrounding rock. It is usually difficult to identify the distribution of the outer zone by conventional seismic sections.

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  • A method and device for predicting the distribution of carbonate fault fracture zones
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  • A method and device for predicting the distribution of carbonate fault fracture zones

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[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] The terms "comprising" and "having" and any variations thereof in the description and claims of the present invention are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or process comprising a series of steps or units. The apparatus is not necessarily limited to those steps or units explici...

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Abstract

The invention provides a method and device for predicting the distribution of fractured zones of carbonate rock faults. The prediction method includes: using seismic coherence technology and seismic amplitude attribute analysis technology to extract the seismic information of the target layer; according to the seismic information, combined with the calibration of drilling data , to determine the threshold value of the outer boundary of the carbonate rock fault fracture zone; according to the threshold value, determine the outer boundary of the carbonate rock fault fracture zone. The invention can accurately predict the distribution of carbonate fault fracture zones.

Description

technical field [0001] The invention relates to geological exploration technology, in particular to a method and device for predicting the distribution of fractured zones of carbonate rock faults. Background technique [0002] Studies have shown that the fault zone is a complex three-dimensional spatial structure including a narrow fault core and a wide fault fracture zone. For example, the fracture zone of carbonate faults in superimposed basins is composed of various types of fractured rocks, fractures, micro-faults, dikes, folds, deformation zones and other fracture-related structures. [0003] Carbonate fault fracture zone includes inner zone and outer zone. Among them, the inner belt and the fault core are usually connected as a whole, and the chaotic weak amplitude area usually shows weak amplitude in the seismic data, the wave group is unstable, the waveform changes greatly, the event changes suddenly, twists and bifurcates; the outer belt is in the seismic section. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30
CPCG01V1/301
Inventor 郑多明万效国邬光辉孙崇浩高莲花袁敬一
Owner PETROCHINA CO LTD
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