Foam flooding high-pressure gas quantitative injector

Abstract

The invention discloses a reservoir oil foam displacement high-pressure gas quantitative injector, which relates to the technical field of oil extraction in oil fields. The reservoir oil foam displacement high-pressure gas quantitative injector comprises a first fixed-volume injector and a second fixed-volume injector, wherein the upper end of the first fixed-volume injector is connected with a first connecting pipe, the upper end of the second fixed-volume injector is connected to a second connecting pipe, the first connecting pipe and the second connecting pipe are connected with a third connecting pipe, the third connecting pipe is connected with a membrane type controller, and the membrane type controller is connected with an output pipe; the first connecting pipe is connected with a fourth connecting pipe, the second connecting pipe is connected with a fifth connecting pipe, and the fourth connecting pipe and the fifth connecting pipe are connected with the same air inlet pipe; and the lower end of the first fixed-volume injector is connected with a sixth connecting pipe, the sixth connecting pipe is connected with a seven connecting pipe and an eighth connecting pipe, a liquid cylinder is connected with a ninth connecting pipe through a high-pressure pump, the ninth connecting pipe is connected with the eighth connecting pipe and a tenth connecting pipe, an eleventh connecting pipe is also arranged in the liquid cylinder, and the eleventh connecting pipe and the tenth connecting pipe are connected with a twelfth connecting pipe.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oil fields, in particular to an injector for injecting gas into a foam generator. Background technique [0002] Foam flooding has become one of the effective measures to increase production in oilfields. The gas-liquid ratio of the special foam fluid for foam flooding determines the apparent viscosity of the foam fluid, which is an important indicator of enhanced oil recovery. How to measure and control high-pressure gas injection into the foam generator is the key technology of foam flooding. The gas-liquid ratio of the foam injected into the oil well is particularly important in the foam flooding process. Usually, the control of the mixed amount of high-pressure gas is realized by adjusting the valve. This method has the following disadvantages: 1. The control amount is inaccurate, and the manual adjustment valve has a large error; 2. The gas cannot be injected at a uniform speed, which...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: 1. The control amount is inaccurate, and the error of manually adjusting the valve is large; 2. The gas cannot be injected at a uniform speed, which is easy to form gas channeling

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