Flow measuring device for rock core displacement experiment

Abstract

The invention discloses a flow measuring device for a rock core displacement experiment. The flow measuring device comprises a sample containing container, a liquid injection assembly, a separating container communicated with the sample containing container, a collecting container located above the separating container, a third pipe communicated with the lower portion of the side wall of the separating container, a first buoy, a second buoy, a first pressurization assembly and a second pressurization assembly, wherein one end of a second pipe is located at the upper portion of the side wall of the separating container, the bottom end of the collecting container is communicated with the top end of the separating container, and the collecting container is used for collecting an oil phase and a liquid phase from a rock core sample. The connecting structure for the second pipe, the third pipe and the collecting container and the separating container can effectively prevent the gas phase and the oil phase of the rock core sample from flowing out of the third pipe and can ensure that the gas phase and the oil phase of the rock core sample enter the collecting container, the volumes of the oil phase and the gas phase can be clearly and accurately measured by observing changes of the two buoys, and further the accuracy of the displacement experiment can be improved.

Description

technical field [0001] The invention relates to the field of flow measurement, in particular to a flow measurement device for a core displacement experiment. Background technique [0002] At present, in the process of carrying out displacement experiments on tight rocks, by obtaining the flow rates of water, oil, and gas in tight rocks, the volume of fluid inside the entire core in the formation can be obtained. [0003] Due to the characteristics of tight rocks with low porosity and permeability, when carrying out displacement experiments on tight rocks, the displacement speed is slow, and the amount of oil phase and gas phase displaced is very small. Considering factors such as oil phase volatilization The measurement error of the flow rate in the experiment is relatively large. Moreover, in the prior art, an open measuring cylinder is used for measurement, and this method cannot capture the gas phase, and cannot make statistics on the flow rate of the gas phase. Therefo...

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Problems solved by technology

Used to solve the problem of inaccurate experimental data in the prior art

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