Multilayer separate injection experiment system and method for carrying out indoor experiment thereof

Abstract

The invention relates to a multilayer separate injection experiment system and a method for carrying out indoor experiment thereof. The multilayer separate injection experiment system comprises constant-flux pumps and piston containers, wherein the first constant-flux pump is connected to the first piston container, polymer solution is contained in the first piston container, the first piston container is connected to an upper connector of a first chemical flooding injector through a pipeline, and the first chemical flooding injector is connected to a second chemical flooding injector through a connecting cylinder; the liquid outlet of the first chemical flooding injector is connected to the inlet end of a first sand pack, the second constant-flux pump is connected to the second piston container, and the second piston container is connected to the inlet end of the first sand pack; the liquid outlet of the second chemical flooding injector is connected to the inlet end of a second sand pack, the third constant-flux pump is connected to the third piston container, the third piston container is connected to the inlet end of the second sand pack, and distilled water is contained in the second piston container and the third piston container. The invention can effectively simulate the process of chemical-flooding multilayer separate injection, and realizes the variable-viscosity and variable-concentration continuous injection of displacing fluid.

Description

technical field [0001] The invention relates to an experimental device used in the research field of oil field chemical flooding injection, in particular to a multi-layer injection experimental device and a method for performing indoor experiments. Background technique [0002] Now many oil fields have entered the late stage of high water cut development, and chemical flooding and polymer injection have been widely used for production. In the process of polymer injection, it is often encountered that the properties of formations vary widely, and the chemical flooding and injection of multiple formations will be affected at the same time. For high permeability formations, polymers need to have relatively large molecular weight and viscosity, while low permeability oil formations and Compared with medium and high permeability oil layers, it is not suitable to inject polymers with high molecular weight into the formation. For low permeability oil layers, when the ratio of pore ...

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Problems solved by technology

[0004] An object of the present invention is to provide a multi-layer split injection experimental device, which is used to solve the problem that the existing indoor chemical flooding test device cannot realize the multi-layer split injection requirements, and the use and operation are cumbersome. Another purpose of this is to provide a method for this multi-layer dispensing experimental device to carry out indoor experiments

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