Reservoir compressibility evaluation method based on cluster analysis of logging petrophysical facies division

A technology of petrophysical facies and cluster analysis, applied in surveying, earthwork drilling, wellbore/well components, etc., can solve the problems of unrepresentativeness and single evaluation results, achieve high prediction accuracy, and cover the range of influencing factors wide effect

Active Publication Date: 2020-07-17
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology

[0005] The present invention provides a reservoir compressibility evaluation method based on cluster analysis logging petrophysical facies division. The present invention comprehensively considers rock mechanical properties, petrophysical response characteristics, reservoir physical parameters and other influencing factors, and solves the background technology Technical problems with single and unrepresentative evaluation results

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  • Reservoir compressibility evaluation method based on cluster analysis of logging petrophysical facies division
  • Reservoir compressibility evaluation method based on cluster analysis of logging petrophysical facies division
  • Reservoir compressibility evaluation method based on cluster analysis of logging petrophysical facies division

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[0035] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0036] The specific implementation manners of the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0037] The present application provides a reservoir compressibility evaluation method based on cluster analysis logging petrophysical facies division, which inc...

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Abstract

The invention relates to a reservoir compressibility evaluation method based on cluster analysis of logging petrophysical facies division. The method includes the steps: acquiring the brittleness index profile of a target block according to the rock mechanics parameter test result of coring data and interval transit time data; acquiring petrophysical response characteristic data of the target block, acquiring reservoir physical property parameter logging data of the target block, and according to the brittleness index profile, the petrophysical response characteristic data and the reservoir physical property parameter logging data of the target block, dividing reservoir petrophysical facies classes based on a cluster analysis method by using a K-nearest neighbor algorithm and a core representative index; and evaluating the compressibility of a target well according to the petrophysical facies classification result. The method solves the technical problem that a single compressibility evaluation result of the prior art is not representative, and the reservoir compressibility quantitative classification result can be obtained based on the cluster analysis method.

Description

Technical field: [0001] The invention relates to the technical field of compressibility evaluation of unconventional oil and gas reservoirs, in particular to a reservoir compressibility evaluation method based on cluster analysis logging petrophysical facies division. Background technique: [0002] At present, horizontal well volume fracturing technology is widely used at home and abroad to realize the effective development of tight oil and gas resources. Rock fracturability is a key parameter to evaluate whether tight reservoirs can achieve high-efficiency fracturing. Accurate evaluation of fracturability can provide technical support for optimizing fracturing intervals and formulating fracturing operation plans. [0003] Currently, the most widely used methods for characterizing the fracturing properties of tight reservoirs are based on evaluating parameters such as brittleness index, fracturability index, and fracture toughness. Due to the mixed concepts of brittleness i...

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Application Information

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IPC IPC(8): E21B49/00E21B47/00
CPCE21B47/00E21B49/00
Inventor 周晓峰魏建光赵小青刘向斌李江涛张世东王安伦丁汝杰
Owner NORTHEAST GASOLINEEUM UNIV
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