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A Reservoir Identification Method Using Seismic Statistical Features

An identification method and statistical feature technology, applied in the direction of seismic signal processing, etc., can solve problems such as the lack of technical methods, and achieve the effect of reducing risks and improving reliability

Active Publication Date: 2018-12-21
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Some of the existing methods are to identify favorable reservoir areas by analyzing the matching relationship between paleostructures and hydrocarbon generation periods, and some are to identify oil reservoirs only by using seismic amplitude technology. In various situations, no effective technical method has been formed

Method used

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  • A Reservoir Identification Method Using Seismic Statistical Features
  • A Reservoir Identification Method Using Seismic Statistical Features
  • A Reservoir Identification Method Using Seismic Statistical Features

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Embodiment

[0033] Let's take the 3D seismic data of a certain area as an example to illustrate. The area of ​​the three-dimensional seismic data in this area is 1000km 2 , before applying the method proposed by the present invention to this area, many exploratory wells have been drilled, and oil reservoirs have been found in sandstone reservoirs under the condition of sand-shale interbeds.

[0034] Due to the differences in the velocity and density of different sandstone reservoirs and their overlying and underlying mudstone formations in this work area, the seismic attributes and seismic response characteristics of oil and gas sandstone reservoirs are not the same, so the application of a single prediction method cannot be very good. To solve the problem of reservoir identification, previous reservoir identification methods cannot effectively identify lithological reservoirs under sand-shale interbedded structures under various circumstances. The specific process of this method is as fo...

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Abstract

The invention relates to a hydrocarbon reservoir identification method by means of a seismic statistical characteristic, wherein the hydrocarbon reservoir identification method belongs to the technical field of earthquake exploration and exploitation. According to the hydrocarbon reservoir identification method, factors which affect hydrocarbon reservoir identification are determined according to existing earthquake and logging data file, and furthermore the probability of each factor in affecting hydrocarbon reservoir identification is determined by means of experimental means. Then the relative weight of each factor is calculated according to the provability of each factor in affecting hydrocarbon reservoir identification. Finally the factors are comprehensively calculated according to the probability of each factor in affecting hydrocarbon reservoir identification and relative weight, thereby obtaining a hydrocarbon reservoir identification success probability. Hydrocarbon reservoir identification can be realized through the hydrocarbon reservoir identification success probability.. According to the hydrocarbon reservoir identification method, the hydrocarbon reservoir is identified by means of the seismic statistical characteristic. The hydrocarbon reservoir identification method has functions of improving hydrocarbon reservoir identification reliability, greatly reducing well location disposition risk and improving economic benefit in oilfield exploration and exploitation.

Description

technical field [0001] The invention relates to a method for identifying oil and gas reservoirs using seismic statistical features, and belongs to the technical field of seismic exploration and development. Background technique [0002] In the process of formation deposition, traps are formed due to the change of lithology of sandstone reservoirs. If the overlying mudstone caprock has good conditions, when oil and gas migrate to this time, sandstone lithologic oil and gas reservoirs can be formed. Due to the differences in velocity and density of different sandstone reservoirs and their overlying and underlying mudstone formations, the seismic attributes and seismic response characteristics of oil and gas sandstone reservoirs are not the same, and the application of a single prediction method cannot well solve such problems. Reservoir identification problem. [0003] The patent "Recognition Method of Triassic Clastic Oil and Gas Reservoirs" (application number: 201010534853...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
Inventor 李俨黎腾岳欣欣谢启胡宇赵乾辰张成壮杨星
Owner CHINA PETROLEUM & CHEM CORP
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