An Experimental Evaluation Method of Dynamic Phase Permeability Curve During Water Injection in Reservoir
An evaluation method and dynamic technology, applied in permeability/surface area analysis, suspension and porous material analysis, instruments, etc., it can solve the problems that the results cannot reflect the real situation, and the influence of capillary pressure is not considered, so as to achieve convenient and accurate calculation, Effects backed by accurate data
Active Publication Date: 2021-03-12
SOUTHWEST PETROLEUM UNIV
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However, the actual oil-water seepage process is dynamic, affected by the dynamic capillary effect, corresponding to the process of the unstable method, the measured relative permeability curve is a dynamic relative permeability curve, which is quite different from the steady state relative permeability curve
When the existing instability method evaluates the dynamic phase permeability curve during the water injection process, the influence of capillary pressure is not considered, so the calculated results cannot reflect the real situation
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[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the present invention will be further described below in conjunction with the drawings and application examples of experimental data processing methods in the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. Those skilled in the art can obtain other drawings based on these drawings without creative efforts.
[0032] details as follows:
[0033] Such as figure 1 As shown, it is the specific flow chart of the dynamic relative permeability curve evaluation method. The dynamic relative permeability curve evaluation experiment of a reservoir core during water injection is carried out, and the steps are as follows:
[0034] 1. Preparation of experimental materials: prepare formation water, crude oil and displacement water, make and screen cores, and establish the original ...
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The invention discloses an experimental evaluation method of dynamic phase permeability curve in the water injection process of oil reservoir, which comprises the following steps in sequence: (1) preparation of experimental materials; (2) preparation of experimental equipment; (3) dynamic displacement experiment; (4) Determine the dynamic capillary pressure; (5) Determine the dynamic phase permeability curve. This evaluation method takes into account the dynamic capillary effect in the water flooding process, and uses the oil phase (water phase) pressure measured in the water flooding process, the oil production flow rate and liquid production flow rate at the liquid outlet, etc. to calculate the dynamic relative permeability conveniently and accurately. It can provide accurate data support for evaluating the reservoir development effect.
Description
technical field [0001] The invention belongs to the technical field of laboratory experiments for oil and gas field development, and in particular relates to an experimental evaluation method for dynamic phase permeability curves during water injection in oil reservoirs. Background technique [0002] The relative permeability curve (phase permeability curve) is a dynamic characteristic parameter describing the interaction between rock-oil-water, and is one of the most important parameters in reservoir development calculations. Its accuracy directly determines the accuracy of reservoir development effect prediction . The dynamic phase permeability curve, that is, when oil and water seepage in the reservoir, the relative permeability is not only a function of saturation, but also a function of the rate of change of saturation. Usually, the direct determination method of phase permeability curve is divided into stable method and unstable method. When the relative permeability...
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IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 李颖李海涛崔小江王科刘子民李斌斌李亚辉
Owner SOUTHWEST PETROLEUM UNIV