Liquid cross-linking agent injecting device

Abstract

The invention relates to a liquid cross-linking agent injecting device, which comprises a liquid storage tank, wherein the top of the liquid storage tank is provided with a cross-linking agent inlet; the cross-linking agent inlet is connected with a self suction pump through a pipeline; the bottom of the liquid storage tank is provided with a cross-linking agent outlet; the cross-linking agent outlet is connected with a cross-linking agent injecting pump through a pipeline; an exhaust valve is arranged on the cross-linking agent injecting pump; a pressure transmitter and an electromagnetic flow meter are arranged on a pipeline arranged at the outlet end of the cross-linking agent injecting pump; and the liquid cross-linking agent injecting device also comprises a control device. The liquid cross-linking agent injecting device has the advantages that the process preparation high-quality injection can be realized; a uniform and stable cross-linking solution system is formed; the metering precision of cross-linking agent adding is improved; the injecting quality and the action effect of the liquid cross-linking agents are ensured; meanwhile, the liquid cross-linking agent injecting device adopts a skid-mounted design, thereby being compact in structure, convenient to carry and low in equipment investment cost.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oil fields, in particular to a liquid cross-linking agent injection device for oil field water plugging, profile control, and flood control and other production enhancement measures. Background technique [0002] Most of my country's oil fields have entered the late stage of development, the production decline is rapid, and the increase of new reserves is getting slower and slower, and the situation is becoming more and more severe. At present, tertiary oil recovery technology has become an important technology for most oil fields in my country to slow down the rate of production decline and maintain stable crude oil production. However, with the large-scale promotion of tertiary oil recovery technology in most oilfields in my country, the heterogeneity of reservoirs has intensified, and large pores or high-permeability strips lead to serious water channeling and steam channeling, which gr...

AI Technical Summary

Problems solved by technology

At present, the addition of on-site cross-linking agent is often done manually and by injection process. There are human factors in manual addition. First, it cannot guarantee the accurate measurement of each addition of cross-linking agent; second, it is very easy to cause high concentration of local cross-linking agent , The gelling speed is too fast, forming uneven and hard-to-break strong micelles, and unable to form a uniform and stable cross-linking solution system

In the on-site cross-linking agent injection process, due to improper control during injection, the amount of cross-linking agent added is too large, causing the concentration of cross-linking agent to be too high, forming strong micelles to block the pipeline, and it is necessary to improve the process preparation process, improve the measurement accuracy, and reduce the injection equipment. Investment costs and many other issues

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