Experimental testing method of rock core dynamic capillary pressure coefficient as well as rock core cleaning device and cleaning method
A technology of capillary pressure and testing method, which is applied in the experimental test of dynamic capillary pressure coefficient of rock core and the field of core cleaning device, which can solve the problem of high test time and cost
Active Publication Date: 2018-09-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
[0010] The present invention provides a fast test method for the above-mentioned problem of high test time and cost of the existing dynamic capillary pressure coefficient
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[0065] The specific technical solutions of the present invention are described in conjunction with the examples.
[0066] like figure 1 As shown, the core circulation degreasing and cleaning device adopted in this embodiment includes a solvent chamber 2 arranged on the heater 1, the solvent chamber 2 is provided with a solvent inlet 3, and a valve is arranged on the solvent inlet 3; the top of the solvent chamber 2 passes through a steam pipe It communicates with the condensation chamber 4, and the condensation chamber 4 is provided with a water-cooling pipeline 5; the lower end of the condensation chamber 4 is provided with a collecting funnel 6, and the bottom of the condensation chamber 4 communicates with the rock core chamber 7, and the rock core sample 10 is placed In the core chamber 7; the side wall of the core chamber 7 is provided with a suction line 8, and a suction pipe 9 is provided below the suction line 8, and the suction pipe 9 communicates with the solvent cha...
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Abstract
The invention relates to the technical field of rock core capillary pressure testing, in particular to an experimental testing method of rock core dynamic capillary pressure coefficient as well as a rock core cleaning device and a rock core cleaning method. The experimental testing method comprises the following steps: first, extracting a rock core sample with a solvent, then placing the sample inwetting phase liquid, obtaining a dynamic capillary pressure curve of the rock core sample after saturated with wetting liquid through constant-speed method measurement, then calibrating the dynamiccapillary pressure curve at different injection speeds, and finally calculating the dynamic capillary pressure coefficient. The experimental testing method of the rock core dynamic capillary pressurecoefficient, provided by the invention, omits the most time-consuming static capillary pressure curve testing, and uses three dynamic capillary pressure curves, and the dynamic capillary pressure curves are calibrated at different injection speeds to calculate the dynamic capillary pressure coefficient. Since there is no static stabilization period in a dynamic capillary pressure curve testing process, the testing speed is faster than that of the static capillary pressure curve testing, and the dynamic capillary pressure coefficient is tested using three dynamic capillary pressure curves.
Description
technical field [0001] The invention relates to the technical field of rock core capillary pressure testing, in particular to a rock core dynamic capillary pressure coefficient experimental testing method, a rock core cleaning device and a cleaning method. Background technique [0002] Core capillary pressure curves are crucial in flow analysis of multiphase flow in porous media. In the conventional simulation analysis process, the high-pressure mercury injection method is usually used to obtain the capillary pressure curve of a core and apply it to the multiphase flow simulation. [0003] However, recent experimental studies have shown that the capillary pressure curve is related to the rate of saturation change in the analysis of subsurface multiphase flow, so the dynamic capillary pressure curve should be used in the simulation. The relationship between the dynamic capillary pressure curve and the rate of saturation change is often expressed as the dynamic capillary pres...
Claims
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IPC IPC(8): G01N1/34G01N1/08G01N1/32G01N33/24
CPCG01N1/08G01N1/32G01N1/34G01N33/24
Inventor 唐明明卢双舫檀洪坤马慧芳初昌宏
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)