Device and method for monitoring fluid flow in rock sample at high temperature and high pressure

Abstract

The invention relates to device and method for monitoring fluid flow in a rock sample at high temperature and high pressure, wherein the device mainly comprises microelectrodes, a rock sample, an insulation material sheet and a rock sample clamper; at least three microelectrodes are fixed and arranged at equal intervals on the insulation material sheet; the rock sample is wrapped by the insulation material sheet; the surface of the rock sample is contacted with the one side, fully distributed with the electrodes, of the insulation material sheet; each electrode is bended into an end-to-end ring; and each microelectrode leads out a wire to form an external test circuit together with an electrode control module, a resistivity collecting module and a computer. The device can test the resistivity between different sections of the rock sample so as to obtain the saturation level and distribution of conducting flow in the rock sample. In the invention, a microelectrode technology is used in the field of petroleum engineering; the corresponding software and hardware are configured for monitoring the important parameters of fluid flow in the rock sample during a dialysis / absorption / displacement test procedure; and the principle is reliable, the operation is convenient, and real and reliable flow rules of underground fluid can be obtained under simulated actual formation conditions and a high-temperature and high-pressure closed environment.

Description

technical field [0001] The invention relates to a monitoring device and method for fluid flow in a rock sample during a dialysis / self-absorption / displacement test process under high temperature and high pressure conditions in the field of petroleum engineering. Background technique [0002] Indoor dialysis / self-absorption / displacement tests in the petroleum industry are of great value for the study of fluid flow laws inside rocks and their quantitative evaluation. Dialysis / self-priming / displacement tests all need to monitor the fluid flow velocity, the position change of water inlet front and the change and distribution of water saturation, but it is very difficult to monitor accurately in laboratory tests. At present, there are mainly three methods for monitoring these important parameters in the dialysis / self-absorption / displacement test at home and abroad: monitoring the pressure change during the dialysis / self-absorption / displacement process; using photolithography techn...

AI Technical Summary

Problems solved by technology

[0003] (1) The first method can only indirectly obtain some parameters by using pressure changes, and cannot monitor important parameters such as fluid distribution, and the amount of information is limited

[0004] (2) The second method does not use real core materials and cannot reflect the real seepage process, nor can it fully reflect the three-dimensional dialysis conditions in the core, which will inevitably lead to errors in the final data recording and analysis

[0005] (3) Although the third method uses relatively advanced technology, it directly leads to a substantial increase in test costs, cannot be widely used, and is not conducive to operation

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