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Identification method for reservoir fluid properties

A technology of reservoir fluid properties and identification methods, applied in the field of reservoir fluid properties identification, can solve problems such as low identification accuracy, and achieve the effect of deepening understanding and high application value

Active Publication Date: 2015-12-09
PETROCHINA CO LTD
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Problems solved by technology

[0005] The invention provides a reservoir fluid property identification method, which is used to solve the problem of low recognition accuracy of existing reservoir fluid property identification methods, and improves the accuracy of reservoir fluid property identification

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  • Identification method for reservoir fluid properties
  • Identification method for reservoir fluid properties
  • Identification method for reservoir fluid properties

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[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0019] At present, due to the continuous deepening of exploration and development, it is becoming more and more difficult to find large-scale high-quality sandstone gas reservoirs with medium-high porosity and medium-high permeability, which makes the exploration and development strata gradually shift to deep-ultra-deep formations. Tight sandstone...

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Abstract

The invention provides an identification method for reservoir fluid properties. The identification method comprises following steps: analyzing sandstone samples of a target reservoir segment to be identified in a single well in order to first carbon isotope data forming sandstone samples; processing first carbon isotope data in order to obtain second carbon isotope data in accord with the standard of carbon content; setting up an identification chart for reservoir fluid properties according to second carbon isotope data; and identifying fluid properties of the target reservoir segment of tight sandstone to be identified in the single well based on the identification chart for reservoir fluid properties. The technical scheme of the identification method for reservoir fluid properties helps to significantly improve accuracy rate for identification of fluid properties of the target reservoir segment to be identified and deepen the understanding of gas reservoir so that great application value is obtained.

Description

technical field [0001] The invention relates to the technical field of geological research, in particular to a method for identifying reservoir fluid properties. Background technique [0002] At present, tight sandstone gas reservoirs are the main battlefield for increasing reserves and production in the field of natural gas exploration and development. They have burial depth (>4000m, and some even reach 8000m), poor reservoir physical properties (porosity<8%, permeability<0.1mD ), complex pore structure (throats are small, mostly <1μm), high formation pressure (>90MPa) and high temperature (above 150°C). The above characteristics make the drilling engineering in the gas reservoir area difficult, costly, and difficult to collect data. Therefore, if we want to formulate a reasonable development technical policy, we first need an effective reservoir fluid identification technology for the geological reserves of this type of gas reservoir. Make a reasonable eval...

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Application Information

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IPC IPC(8): E21B49/00
Inventor 赵力彬江同文昌伦杰陈文龙孙雄伟朱忠谦肖香姣杨学君张同辉黄志龙郭晓波韩为
Owner PETROCHINA CO LTD
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