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Gas wetability test method

A technology of gas wettability and testing methods, applied in the direction of measuring devices, weighing and instruments by removing certain components, can solve problems such as difficult to achieve, high requirements for measurement conditions, complicated and difficult to achieve measurement process, and easy to achieve Operation, low requirements, simple and intuitive effect of obtaining test results

Active Publication Date: 2016-08-03
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a gas wettability test method, which is used to solve the problems of measuring gas wettability in the prior art, which require high measurement conditions, are difficult to achieve, and the measurement process is complicated and difficult to realize.

Method used

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Embodiment Construction

[0039] 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.

[0040] figure 1 A schematic flow chart of Embodiment 1 of the gas wettability testing method provided by the present invention, such as figure 1 As shown, the method includes:

[0041] S101. Hang the rock to be tested under the weighing device, immerse the rock to be tested in the liquid, and start timing at the same time.

[0042] During the s...

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Abstract

The invention provides a gas wetability test method. The method comprises the following steps: hanging rock to be measured underneath a weighing device, immersing the rock to be measured into a liquid, recording water absorption time and quality of the rock to be measured after water absorption according to preset time interval, obtaining water absorption speed of the rock to be measured according to the quality of the rock to be measured after water absorption and the water absorption time, taking the 100% water saturated rock to be measured after water absorption out of the liquid and putting the rock onto the weighing device, recording volatilization time and quality of the rock to be measured after volatilization according to preset time interval, obtaining volatilization speed of the rock to be measured according to the quality of the rock to be measured after volatilization and the volatilization time, and obtaining gas wetability of the rock to be measured according to the water absorption speed of the rock to be measured and the volatilization speed. The method provided by the invention is simple and feasible, and requirements on experimental samples are not high. The method is easy to operate, and the obtained test result is simple and visual.

Description

technical field [0001] The invention relates to the field of oil and gas exploitation, in particular to a gas wettability test method. Background technique [0002] Wetting phenomenon refers to the phenomenon that one fluid is replaced by another fluid on the solid interface. The wettability of reservoir rocks generally includes water wet, oil wet and neutral wet. Later, the gas wettability was proposed, that is, the solid was treated with a fluorine-containing surfactant to make its surface hydrophobic and oil-repellent, with amphobia, so as to achieve the purpose of gas wettability. The wettability of oil and gas reservoir rocks is an important factor affecting the recovery process of oil and gas reservoirs. Specifically, due to the molecular film formed by the adsorption of fluorine-containing surfactants on the rock surface, the surfactant molecules are adsorbed on the rock surface, and the rock The wettability of the surface is reversed from liquid-wet to gas-wet, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02G01N5/04G01N13/00
Inventor 林光荣王东旭刘学刚刘秋兰王慧玲章志锋李永胜黄静孟涛张小荣
Owner PETROCHINA CO LTD
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