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Determination method and device for saturation index of rock soil

A determination method and saturation technology, applied in the field of petroleum exploration, can solve problems such as difficult to determine reservoir oil saturation, difficult to accurately obtain rock and soil water saturation index, etc., to achieve the effect of accurately determining reservoir oil saturation

Active Publication Date: 2019-12-27
PETROCHINA CO LTD
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Problems solved by technology

[0005] This application provides a method and device for determining the saturation index of rock and soil, so as to solve the problem that it is difficult to accurately obtain the water saturation index of rock and soil in the related art, so that it is difficult to determine the oil saturation of the reservoir

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  • Determination method and device for saturation index of rock soil
  • Determination method and device for saturation index of rock soil
  • Determination method and device for saturation index of rock soil

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Embodiment Construction

[0026] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. 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.

[0028] It should be noted that the terms "first" and "second...

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Abstract

The invention discloses a determination method and device for a saturation index of rock soil. The method comprises the steps of performing oil washing on target rock soil; performing saturation processing on the target rock soil with a mineral solution after oil washing; drying the target rock soil after saturation processing under a constant-temperature and constant-humid environment, and determining a change relation between resistance increase rate of the target rock soil and water saturation of the target rock soil according to data measured during the drying process after the target drying process is completed; and determining the saturation index of the target rock soil according to the change relation between the resistance increase rate of the target rock soil and the water saturation of the target rock soil. By the method, the problem that the water saturation index of the rock soil cannot be accurately acquired in the prior art so that the oil saturation of reservoir is difficult to determine is solved.

Description

technical field [0001] The present application relates to the technical field of petroleum exploration, in particular, to a method and device for determining the saturation index of rock and soil. Background technique [0002] In the process of petroleum exploration, it is necessary to calculate the oil saturation of the reservoir, which can be calculated by using the Archie formula, in which the saturation index value is an important parameter for calculating the oil saturation of the reservoir, which needs to be accurately determined. [0003] At present, the determination of the saturation index value mainly adopts the method of oil flooding water, by measuring the changes of water saturation and resistivity under different displacement pressures to draw a relationship diagram between water saturation and resistance increase rate, so as to determine Saturation index value. However, rock samples with high clay content have poor permeability, and it is difficult to accurat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04G01N24/08
CPCG01N24/081G01N27/041
Inventor 支东明王小军毛新军孙中春王振林王伟朱涛张妮牟立伟赵龙
Owner PETROCHINA CO LTD
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