Method for comprehensively evaluating crack-hole type carbonate reservoir based on karst parameters

A carbonate rock reservoir and comprehensive evaluation technology, applied in the fields of earthwork drilling, wellbore/well components, etc., can solve the problems of non-specificity and no specific methods, and achieve the effect of quantitative and comprehensive evaluation.

Active Publication Date: 2019-05-21
陕西天成石油科技有限公司
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Problems solved by technology

This is essentially the evaluation of the "matrix" rock blocks of carbonate reservoirs, which belongs to the category of evaluating the reservoir properties of carbonate reservoirs, and does not belong to the comprehensive evaluation of carbonate reservoirs. Specific methods for operation

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  • Method for comprehensively evaluating crack-hole type carbonate reservoir based on karst parameters
  • Method for comprehensively evaluating crack-hole type carbonate reservoir based on karst parameters
  • Method for comprehensively evaluating crack-hole type carbonate reservoir based on karst parameters

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Embodiment Construction

[0043] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0044] Taking the carbonate reservoirs of the Upper Ordovician Liangli Formation and the Middle-Lower Ordovician Yingshan Formation in the TZH area of ​​Xinjiang, China as examples, the fractured-vuggy carbonate reservoirs were comprehensively evaluated based on karst parameters.

[0045] A method for comprehensively evaluating fractured-vuggy carbonate reservoirs based on karst parameters, comprising the following steps:

[0046] The first step is to establish a reservoir concept model by using data such as drilling, well logging, mud logging, cores and cast thin sections, and identify fractured-vuggy carbonate reservoirs;

[0047] Due to the emptying of drilling tools and a large amount of mud loss during drilling, the logging curves show high natural gamma ray and low resistivity, and terrigenous clastics and large-grained carbonate minerals (ore A ...

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Abstract

A method for comprehensively evaluating a crack-hole type carbonate reservoir based on karst parameters comprises the following steps: firstly, establishing a reservoir concept mode, and identifying the crack-hole type carbonate reservoir; making an applicable classification evaluation standard for the reservoir, and performing semi-quantitative-qualitative division and evaluation on the single well reservoir; carrying out carbonate rock crack evaluation and prediction through ancient structure stress field analysis to obtain key crack parameters of reservoir evaluation; characterizing two karst parameters, namely the vertical karst rate and the karst strength, and conducting calculating to obtain key karst parameters for reservoir evaluation; integrating the sedimentary microfacies type,the key crack parameters and the key karst parameters, and carrying out multi-factor reservoir development probability evaluation by utilizing a superposition probability evaluation method; and underthe constraint of a crack evaluation prediction plane graph, combining a single well reservoir evaluation result and a reservoir development probability evaluation result to realize reservoir evaluation and prediction on the plane. The method has the advantages of being high in comprehensiveness, quantitative in evaluation and operable.

Description

technical field [0001] The invention relates to the technical field of carbonate reservoir evaluation for petroleum and natural gas exploration, in particular to a method for comprehensively evaluating fracture-cavity carbonate reservoirs based on karst parameters. technical background [0002] Reservoir evaluation is one of the core contents of reservoir research. Reservoir evaluation in oil and gas exploration stage can be divided into single well reservoir evaluation and planar reservoir evaluation according to actual needs. Single well reservoir evaluation mainly occurs in the first and second stages of the five stages of oil and gas exploration (regional exploration, trap pre-exploration, oil and gas field evaluation and exploration, rolling exploration and development, and deepening exploration in mature areas), and planar reservoir evaluation runs through oil and gas exploration. of the various stages. [0003] Most of the reservoirs in the world's major oil and gas ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 赵永刚谭成仟赖生华王俊奇宋立军王政杰李磊杨路颜
Owner 陕西天成石油科技有限公司
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