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Method for continuously detecting physical parameters of compact rocks

A technology of physical parameters and compact rocks, which is applied in the direction of measuring devices, test sample preparation, sampling, etc., can solve problems such as single method and inaccurate measurement, and achieve the effect of improving detection efficiency, improving accuracy, and saving detection time

Active Publication Date: 2019-03-08
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

The invention overcomes the shortcomings of previous experimental methods such as singleness and inaccurate measurement, and can effectively measure the basic physical parameters of tight rocks

Method used

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  • Method for continuously detecting physical parameters of compact rocks
  • Method for continuously detecting physical parameters of compact rocks
  • Method for continuously detecting physical parameters of compact rocks

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043]The invention discloses a method for measuring the physical parameters of compact rocks. The method combines traditional measurement with NMR. First, the effective pores of the rock are accurately calculated by using the change characteristics of the rock sample weight before and after self-absorption and the change of the area of ​​the NMR curve. At the same time, the unsteady state method was used to measure the gas-water relative permeability, combined...

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Abstract

The invention discloses a method for continuously detecting physical parameters of compact rocks. The method includes the steps: selecting a rock sample, drying the rock sample, measuring the size andweight of the rock sample, taking formation water, soaking a fiber with a gap, repeatedly rolling a rock core on the fiber, uniformly soaking the outer surface of the rock core except for two end surfaces, placing the rock sample into an adjusted nuclear magnetic resonance spectrometer to obtain a T2 spectral curve of the sample, taking out the rock sample to dry the rock sample, performing saturation treatment on the rock core by the formation water, and testing a T2 spectral curve by the nuclear magnetic resonance spectrometer; taking out the rock sample, placing the taken rock sample intoa rock core clamping device, applying displacement pressure until the displacement pressure reach a suitable displacement pressure difference value, accurately recording needed parameters after a system is stabilized, continuing to measure the rock sample by a soap film flow meter, measuring a T2 spectral curve of the rock sample again, and analyzing and calculating acquired data to obtain variousof needed parameters. The method has the advantages that data are accurate and reliable, time is saved, and the method is convenient and rapid.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a method for continuously detecting physical property parameters of tight rocks. Background technique [0002] As the development of conventional oil and gas resources is close to saturation, the technical research and development of unconventional oil and gas reservoirs is deepening. On this basis, tight oil and gas has become a hot spot in oil exploration and development in recent years. The physical parameters such as porosity, permeability, relative permeability and saturation of reservoir rock are the basic indicators to describe the reservoir characteristics of tight oil and gas reservoirs. The accurate determination of the basic physical parameters of rocks is of great significance to the economical and efficient development of oil and gas reservoirs. [0003] To measure the porosity of a rock sample, it is necessary to obtain the total volume of the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N15/08
CPCG01N1/286G01N15/08G01N2001/2873
Inventor 任岚李高敏贾久波林然
Owner SOUTHWEST PETROLEUM UNIV
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