Fat gas mud shale stratum well log standardizing method

A logging curve and mud shale technology, which is applied in the field of logging standardization, can solve the problems of high organic matter content, complex lithology, and cannot be applied to mud shale layers, etc. Effect

Inactive Publication Date: 2014-09-17
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

Shale reservoirs are dense, complex in lithology, high in organic matter, and very heterogeneous. The construction method of the standard layer is obviously different from that of conventional sandstone formations. Therefore, the standardization method in the prior art cannot be applied to mud shale layers.

Method used

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  • Fat gas mud shale stratum well log standardizing method
  • Fat gas mud shale stratum well log standardizing method
  • Fat gas mud shale stratum well log standardizing method

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Embodiment Construction

[0033] The present invention will be further described in conjunction with accompanying drawing:

[0034] The method for standardization of logging curves in oil and gas shale formations in this example was tested in the Xiaochengzi area of ​​Wangfu Sag:

[0035] 1. Test background introduction:

[0036] The Wangfu Sag is an important oil and gas exploration field in the southeastern uplift of the Songliao Basin. The dark mudstone of the Qingshankou Formation is thick, has a high abundance of organic matter, shows obvious full hydrocarbons, and has shallow burial depths. It has the most potential for shale oil and gas exploration in the southern Songliao Basin. one of the blocks. The burial depth of the bottom of the Qing 1 member in the Xiaochengzi area of ​​Wangfu Sag is between 560m and 940m, and the overall trend is "high in the east and low in the west, low in the south and high in the north". The formation of Qingshankou Formation was formed in the sedimentary period of ...

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Abstract

The invention discloses a fat gas mud shale stratum well log standardizing method which comprises the following steps: (a), selecting and constructing a standard layer; (b) carrying out eigenvalue analysis; (c) carrying out curve correction; (d) carrying out standardization effect verification. By utilizing the method disclosed by the invention, when mud shales and neighborhood layers are short of two stable standard layers, curve standardization can be realized, the comparability of well logs of multiple wells is increased, effective popularization of heterogeneous modeling is ensured, and further the precision of heterogeneous logging evaluation is improved.

Description

technical field [0001] The invention relates to a well logging standardization method, in particular to a well logging curve standardization method for an oil-gas shale formation. Background technique [0002] The standardization of well logging data is a basic work before the development of fine reservoir evaluation and joint well-seismic inversion. It can eliminate systematic errors in well logging data, restore the true value of well logging data as much as possible, and enhance multi-well The comparability between curves is the guarantee for improving the accuracy of logging interpretation and seismic inversion. The standardization of curves is mainly based on the principle that "same lithology formations have similar logging responses under the same depositional environment". Two sets of standard layers with stable lithology are selected for eigenvalue analysis and correction amount. After correction, the curves have similar The frequency histogram distribution or eige...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 肖佃师卢双舫黄文彪薛海涛陈方文王伟明
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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