Method for determining relative permeability of dense rock oil phase

A technology of relative permeability and measurement method, which is applied in the field of relative permeability measurement of tight rock oil phase, can solve the problem of inaccurate measurement of relative permeability of oil phase of tight reservoir rock, and achieve high applicability, high measurement accuracy, and easy operation. simple effect

Active Publication Date: 2019-10-18
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0012] The object of the present invention aims at the technical defect that the existing relative permeability measurement method cannot accurately me

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  • Method for determining relative permeability of dense rock oil phase
  • Method for determining relative permeability of dense rock oil phase
  • Method for determining relative permeability of dense rock oil phase

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[0072] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0073] A method for measuring relative permeability of tight rock oil phase, comprising the steps of:

[0074] S1. Take a cylindrical rock sample of compact rock with a length of 9 cm and a diameter of 2.5 cm, and wash the rock sample with oil, salt, and drying.

[0075] S2, press figure 1 As shown, cut the washed and dried rock sample into three sections, the first and second sections are 2.5cm in length, and the third section is 4cm in length, and then put the three sections of rock samples into the oven to continue drying for 1 day .

[0076] S3. According to the national standard GB / T 29171-2012 "Determination of Rock Capillary Pressure Curve", conduct oil-wat...

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Abstract

The invention discloses a method for determining relative permeability of a dense rock oil phase. The method for determining the relative permeability of the dense rock oil phase comprises the following steps: S1, taking a cylindrical rock sample of the dense rock; S2, cutting the rock sample into three sections; S3, performing an oil-water capillary pressure test on the first section of the rocksample; S4, performing a constant-rate mercury injection experiment on the second section of the rock sample; S5, measuring the porosity [phi]<He>, permeability k, length L, diameter D, dry weight m<0> and density [rho] of the third section of the rock sample; S6, vacuuming the third section of the rock sample and pressurizing a saturated MnCl<2> solution; S7, performing an oil flooding water experiment on the third section of the rock sample after the saturation is completed, and taking out the core for aging; and S8, wiping off the surface oil of the third section of the rock sample after aging, then weighing the third section of the rock sample and recording as m2, and meanwhile, obtaining a T2 spectrum curve and a nuclear magnetic porosity of the rock sample by using a nuclear magneticresonance spectrometer; then performing a self-water absorption and oil discharge test; and finally, processing the data. When using the method for determining the relative permeability of the denserock oil phase to test the experimental data, the measurement precision is high, and the operation is simple; the characteristics of the dense rock and the related seepage theory are fully utilized; and the applicability is better.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a method for measuring relative permeability of tight rock oil phase. Background technique [0002] As a new hotspot in the field of unconventional oil and gas exploration and development, tight oil has become one of the important future energy sources in my country. The relative permeability curve of oil phase is one of the important parameters to understand the characteristics of oil-water flow in tight oil and gas reservoirs. It can effectively determine the relative permeability of rock oil phase to the recovery degree of the reservoir, analyze the law of water production of oil wells, enhance the recovery factor and the saturation of remaining oil. degree of research is of great significance. Therefore, many scholars have carried out a lot of research on the relative permeability of oil reservoirs. Based on the analysis of the interaction rel...

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/0826G01N15/088
Inventor 肖文联杨玉斌李闽赵金洲任吉田郑玲丽张骏强彭佳明王玥
Owner SOUTHWEST PETROLEUM UNIV
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