Device and method for simultaneous detection of displacement and sucking capillary force curves under oil reservoir conditions

A technology of capillary force and conditions, applied in measuring devices, suspension and porous material analysis, instruments, etc., can solve the problems that the centrifugation method is difficult to simulate the characteristics of reservoir conditions, cannot be mixed, and the displacement and sucking process are very different.

Pending Publication Date: 2018-06-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The parameters used to obtain the subsurface capillary force curve obtained through conversion and calculation of mercury injection capillary force cannot be accurately measured, resulting in a large deviation between the converted subsurface capillary force curve and the actual; centrifugation method is difficult to simulate the characteristics of high temperature and high pressure reservoir conditions; use The semi-permeable diaphragm method can more realistically simulate the temperature and pressure conditions of the reservoir. Some institutions have developed a high-temperatu

Method used

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  • Device and method for simultaneous detection of displacement and sucking capillary force curves under oil reservoir conditions
  • Device and method for simultaneous detection of displacement and sucking capillary force curves under oil reservoir conditions

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Embodiment 1

[0045] Such as figure 1 As shown, the device for joint measurement of displacement and suction capillary force curves under reservoir conditions includes: triaxial stress core holder 5, which is a cylindrical core holder placed horizontally, three The axial stress core holder has a pressure resistance of 60MPa; the triaxial stress core holder 5 is equipped with a rubber tube and plugs at both ends; the rubber tube is equipped with a core 6, and one end of the core 6 is equipped with a non-wetting phase semi-permeable partition 7 , the other end is provided with a wetting phase semi-permeable partition 8; a non-wetting phase semi-permeable partition 7 and a wetting phase semi-permeable partition 8 are respectively in contact with the plugs at both ends of the triaxial stress core holder 5, and the non-wetting phase The phase semi-permeable partition 7 can allow the non-wetting phase fluid to pass through while preventing the wetting phase fluid from passing through, and the wet...

Embodiment 2

[0082] Such as figure 2 As shown, the displacement and suction capillary force curve joint measurement device group under reservoir conditions includes three sets of triaxial stress core holders, three sets of non-wetting phase back pressure controllers, and three sets of non-wetting phase pressure flow sensors Three sets of non-wetting phase fluid metering tubes, three sets of wetting phase back pressure controllers, three sets of wetting phase pressure flow sensor groups, three sets of wetting phase fluid metering tubes, three sets of non-wetting phase semi-permeable barriers plate, three sets of semi-permeable partitions for wetting phase, one set of constant speed and constant pressure micropump, one set of piston container for non-wetting phase fluid, one set of piston container for wetting phase fluid, pressure gauge, and one set of ring-pressing axial pressure mechanical pump , a set of back pressure mechanical pumps, and a computer; among them: the ring pressure axial...

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Abstract

The invention relates to a device and a method for simultaneous detection of displacement and sucking capillary force curves under oil reservoir conditions. The device comprises a triaxial stress rockcore holder, wherein a wet phase semi-permeable separator and a non-wetting phase semi-permeable separator are respectively placed at both ends of a rock core, an annular pressure and axial pressuremechanical pump and a back pressure mechanical pump are used to pressurize and simulate formation pressure, a thermostat simulates formation temperature, a non-wetting phase fluid piston container, awet phase fluid piston container and a constant speed constant pressure micro pump control a displacement and suction process, a pressure flow rate sensor group, a pressure gauge, a metering tube anda computer collect pressure and liquid volume data and process and calculate the displacement and sucking capillary force curves; the method continuously measures the displacement and sucking capillary force curves of different wettable rocks in one time and scans the displacement and sucking capillary force curves by simulating true oil reservoir temperature pressure and fluid conditions, makes up for the shortcomings of conventional methods, solves the defect that a common instrument can only measure displacement capillary force curves, and solves the problem of continuous accurate measurement of underground real displacement and sucking capillary force curves.

Description

technical field [0001] The invention belongs to the field of evaluation of special physical properties of reservoir rocks, and in particular relates to a device and method for joint measurement of displacement and suction capillary force curves under oil reservoir conditions. Background technique [0002] Due to the small pores of low-permeability and tight oil and gas reservoirs, the capillary force curve is an important basic data for the development and design of such reservoirs, especially for the calculation of oil and gas reserves in the transition zone of hundreds of meters. Commonly used methods for measuring capillary force curves include semi-permeable diaphragm method, mercury intrusion method and centrifugation method. The parameters used to obtain the subsurface capillary force curve obtained through conversion and calculation of mercury injection capillary force cannot be accurately measured, resulting in a large deviation between the converted subsurface capil...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/0826G01N15/088
Inventor 付帅师李爱芬方齐任晓霞张磊樊冬艳谢昊君袁翠平
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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