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Device and method for measuring fluid saturation pressure and seepage capacity in porous media

A porous medium and pressure technology, which is applied in the direction of measuring devices, suspension and porous material analysis, permeability/surface area analysis, etc., can solve the problems of complexity, expensive operation of equipment, and low accuracy of measurement methods, and achieve simple equipment and easy operation. simple effect

Active Publication Date: 2021-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can accurately measure the saturation pressure of the fluid in the porous medium, and evaluate the seepage capacity of the fluid before and after the saturation pressure, which meets the requirements of the oil and gas reservoir development experiment, and solves the problem that the influence of the porous medium cannot be considered when measuring the saturation pressure with the PVT cylinder, and the accuracy of other measurement methods is low. The problem of expensive equipment and complicated operation is to provide rapid and reliable experimental data for production and scientific research. The device is small in size and easy to operate, and can quickly obtain accurate results, and at the same time obtain the evaluation results of fluid seepage capacity

Method used

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  • Device and method for measuring fluid saturation pressure and seepage capacity in porous media

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Experimental program
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Embodiment approach 1

[0043] According to one aspect of the present invention there is provided a device for measuring fluid saturation pressure and seepage capacity in porous media, the device comprising:

[0044] High temperature and high pressure core holder, two-way piston pump, volume adjustment device, pressure collection device and pressure difference collection device;

[0045] Wherein, the volume adjustment device includes a chamber and a piston, one side of the piston is an effective chamber, and the piston can move in the chamber to adjust the volume of the effective chamber;

[0046] Wherein, the liquid to be tested flows into the two-way piston pump through the effective chamber, and the two-way piston pump makes the liquid to be tested flow through the core sample in the high-temperature and high-pressure core holder;

[0047] The pressure collection device is used to collect the real-time pressure of the liquid to be tested. The pressure collection end of the differential pressure co...

Embodiment approach 2

[0070] According to another aspect of the present invention there is provided a method for measuring a device for measuring fluid saturation pressure and seepage capacity in a porous medium, the method comprising:

[0071] Hold the core sample to be tested by the high temperature and high pressure core holder;

[0072] Vacuumize the device, and then adjust the temperature of the device to the experimental temperature;

[0073] Inject the liquid to be tested into the device through the volume adjustment device;

[0074] Control the movement of the piston so that the liquid to be tested flows through both sides of the core sample to be tested, and obtain the pressure of the liquid to be tested at this time, the pressure difference before and after the liquid to be tested flows through the core sample to be tested, the flow rate of the liquid to be tested and the effective chamber volume;

[0075] Based on the pressure of the liquid to be tested, the pressure difference before ...

Embodiment 1

[0087] The device for measuring fluid saturation pressure and seepage capacity in porous media includes: a high temperature and high pressure core holder, a bidirectional piston pump, a volume adjustment device, a pressure acquisition device and a pressure difference acquisition device;

[0088] Wherein, the volume adjustment device includes a chamber and a piston, one side of the piston is an effective chamber, and the piston can move in the chamber to adjust the volume of the effective chamber;

[0089] Wherein, the liquid to be tested flows into the two-way piston pump through the effective chamber, and the two-way piston pump makes the liquid to be tested flow through the core sample in the high-temperature and high-pressure core holder;

[0090] The pressure collection device is used to collect the real-time pressure of the liquid to be tested. The pressure collection end of the differential pressure collection device is set on both sides of the high temperature and high p...

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Abstract

The invention provides a device and method for measuring fluid saturation pressure and seepage capacity in porous media, the device comprising: a high temperature and high pressure core holder, a bidirectional piston pump, a volume adjustment device, a pressure acquisition device and a differential pressure acquisition device; wherein , the volume adjustment device includes a chamber and a piston, one side of the piston is an effective chamber, and the piston can move in the chamber to adjust the volume of the effective chamber; wherein, the liquid to be tested flows into the two-way piston pump through the effective chamber, and the two-way piston pump makes The liquid to be tested flows through the core sample in the high temperature and high pressure core holder; the pressure acquisition device is used to collect the real-time pressure of the test liquid, and the pressure acquisition end of the pressure difference acquisition device is set on both sides of the high temperature and high pressure core holder , used to detect the pressure difference before and after the fluid to be tested flows through the core sample. The device can accurately measure fluid saturation pressure and seepage capacity in porous media.

Description

technical field [0001] The invention belongs to the field of oil and gas exploration and development, and more specifically relates to a device and method for measuring fluid saturation pressure and seepage capacity in porous media. Background technique [0002] In the field of oil and gas reservoir development, fluid saturation pressure refers to the pressure when the pressure drops to the point where the gas begins to separate from the liquid phase under formation conditions. For oil reservoirs, the saturation pressure is usually called the bubble point pressure, and for condensate gas reservoirs, the saturation pressure is usually called the dew point pressure. Saturation pressure is a turning point for the change of fluid physical properties. Before and after saturation pressure, the gas-oil ratio, volume coefficient, compressibility coefficient, viscosity, etc. of the fluid will change significantly, thus affecting the flow ability of the fluid in porous media. In addi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 周霞伦增珉吕成远王锐王海涛王欣胡伟杨阳李文红周冰
Owner CHINA PETROLEUM & CHEM CORP
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