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Method for identifying igneous rock invasion range in carbonate reservoir

A carbonate rock reservoir and identification method technology, which is applied in the field of identifying the intrusion range of igneous rocks in carbonate rock reservoirs, can solve the problems of inaccurate identification of the intrusion range of igneous rocks, etc., so as to improve reliability, ensure integrity, The effect of enhanced noise immunity

Inactive Publication Date: 2020-05-29
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for identifying the intrusion range of igneous rocks in carbonate rock reservoirs, so as to solve the problem of inaccurate identification of intrusion ranges of igneous rocks when carrying out accurate description of carbonate rock reservoirs and calculation of reserves

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  • Method for identifying igneous rock invasion range in carbonate reservoir
  • Method for identifying igneous rock invasion range in carbonate reservoir
  • Method for identifying igneous rock invasion range in carbonate reservoir

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Embodiment 1

[0029] Embodiment 1 provides a method for identifying the range of igneous rock intrusion in carbonate rock reservoirs, the method for identifying comprises the following steps:

[0030] Step S1: According to the geological background and regional structure of the seismic data, preliminarily determine whether there is igneous rock intrusion and analyze the strong amplitude reflection characteristics of the igneous rock at the corresponding time window of the seismic section. Specifically, the following steps are included:

[0031] Step S11: analyze the geological background and regional structure of the seismic data, and determine whether the area has the influence of igneous rock intrusion;

[0032] Step S12: On the basis of the geological background and regional structure of the seismic data, combine the side channel seismic data and well logging data to carry out the analysis and processing of strong reflection seismic attributes such as amplitude, phase, frequency, etc., p...

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Abstract

The invention discloses a method for identifying the igneous rock invasion range in a carbonate reservoir. The method comprises steps of preliminary analysis, establishment of a complete dictionary, judgment of the invasion range of igneous rock and the like. The invention discloses a method for identifying the igneous rock invasion range in the carbonate reservoir. Depending on the idea of sparsedecomposition, the optimal matching wavelet obtained from the over-complete dictionary is tracked, identified and separated by using the multi-channel matching pursuit so that calculation efficiencyis improved, integrity of an original seismic signal can be better ensured, noise immunity is enhanced, the distribution range of igneous rocks is more accurately determined, and reliability of seismic data is improved.

Description

technical field [0001] The invention relates to the field of marine geology, in particular to a method for identifying the intrusion range of igneous rocks in carbonate rock reservoirs. Background technique [0002] In carbonate reservoirs such as organic reefs and bioclastic beaches, the intrusion of igneous rocks leads to inaccurate description of carbonate reservoirs, and even destroys the storage performance of carbonate reservoirs under certain conditions. Therefore, How to accurately describe the intrusion range of igneous rocks is of great significance for the accurate estimation of carbonate reservoir reserves. When the scale and spread of igneous rock intrusion are not particularly large, due to the high velocity of igneous rock, it usually presents certain reflection characteristics on the seismic section. In practical applications, well-seismic fine calibration is usually used to determine the reflection characteristics of igneous rocks, and Using typical seismic...

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/624
Inventor 杜向东印兴耀韩文明张世鑫曹向阳张英德曹丹平
Owner CHINA NAT OFFSHORE OIL CORP
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