Method and device for determining fracture porosity

A fracture porosity and fracture technology, applied in the field of oil and gas exploration, can solve the problems of poor accuracy and low precision of fracture porosity, and achieve the effect of low precision and accurate quantitative determination

Active Publication Date: 2019-12-10
PETROCHINA CO LTD
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  • Application Information

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[0005] The embodiment of the present application provides a method and device for determining the fracture porosity, so as to so

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  • Method and device for determining fracture porosity
  • Method and device for determining fracture porosity
  • Method and device for determining fracture porosity

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Embodiment Construction

[0062]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 protection scope of this application.

[0063] Considering the existing determination methods of fracture porosity, most of them are based on well logging data and seismic data to qualitatively or quantitatively predict the fracture porosity of the target area. Because the above-mentioned well logging data and seismic data are less effective in characterizing fracture characteristi...

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Abstract

The embodiment of the invention provides a method and device for determining the porosity of cracks. The method comprises the following steps: acquiring an outcrop sample and a rock core sample in a target region; carrying out three-dimensional laser scanning on the outcrop sample, and establishing a reservoir geologic model of the target region; determining extension lengths of the cracks according to the reservoir geologic model of the target region; determining the opening, filling coefficients and penetration coefficients of the cracks according to the rock core sample; and determining the porosity of the cracks in the target region according to the extension lengths, opening, filling coefficients and penetration coefficients of the cracks. According to the scheme, the reservoir geologic model is established by virtue of the outcrop sample with a relatively good representation effect and is used for quantitatively determining the cracks; by combining with rock core data, the porosity of the cracks is accurately determined, so that the technical problems that the precision of the determined porosity of the cracks is low, and the accuracy is relatively poor in existing methods are solved, and the porosity of the cracks is rapidly, accurately and quantitatively determined.

Description

technical field [0001] The present application relates to the technical field of oil and gas exploration, in particular to a method and device for determining fracture porosity. Background technique [0002] During the diagenetic evolution of oil and gas reservoirs, fractures play an important role in the improvement of reservoir quality. Therefore, when carrying out specific oil and gas exploration in the target area, it is often necessary to determine the fracture porosity in the target area first, and then carry out corresponding oil and gas exploration and development in the target area according to the determined fracture porosity. [0003] In order to determine the fracture porosity, most of the existing methods are to qualitatively or quantitatively predict the fracture porosity of the target area through mathematical modeling and data inversion based on the logging data and seismic data of the target area. Since the logging data and seismic data used cannot intuitiv...

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/088
Inventor 曾庆鲁张荣虎王波卢文忠赵继龙张惠良张先龙陈戈
Owner PETROCHINA CO LTD
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