A continuous injection acidification equipment for water injection well

Abstract

The invention belongs to the technical field of oil field water injection development, and specifically provides a water injection well continuous injection acidification equipment, which consists of an acid liquid storage tank (1), a hydraulic double-diaphragm metering pump (2), a control system (3), and an acid liquid pipeline system (4), on-line monitoring system (5), and truck moving system, in which the acid storage tank (1) is connected to the hydraulic double-diaphragm metering pump (2), and the outlet of the hydraulic double-diaphragm metering pump (2) is connected to the acid pipeline The system (4) is connected, the control system (3) is connected with the hydraulic double diaphragm metering pump (2), the online monitoring system (5) is connected with the acid liquid pipeline system (4), the acid liquid storage tank (1), the hydraulic double diaphragm The common steel base of the metering pump (2) and the control system (3) is connected with the chassis of the truck mobile system. The invention realizes efficient, rapid and large-scale plugging removal of water injection wells through online construction, reduces water injection pressure, and increases water injection volume.

Description

technical field [0001] The invention relates to an acidizing technology for water injection wells in downhole operations in the field of water injection development in oil fields, and in particular to a continuous injection acidification equipment for water injection wells aimed at efficiently and rapidly reducing wellhead injection pressure and improving the water injection capacity of the water injection wells. Background technique [0002] The reduction of water injection capacity of water injection wells in domestic oilfields is mostly caused by the reduction of permeability near the wellbore. The reasons for this change include rock fragmentation, water pollution of injection water, swelling of clay attached to the hole wall, and particle migration. In response to this situation, acidification measures are generally used to reduce pressure and increase injection. Acidizing can effectively remove plugging components, improve reservoir water absorption capacity, reduce in...

AI Technical Summary

Problems solved by technology

In the conventional acidizing construction, the four-step treatment process is often adopted, namely, the construction procedures such as "injecting pre-fluid → injecting treatment fluid → injecting post-fluid → injecting replacement fluid". The process is complicated and the steps are cumbersome, and there are the following disadvantages: There are many liquid tanks and auxiliary equipment, which is time-consuming and labor-intensive; ②The construction process is complex and labor-intensive; ③The operation is highly exclusive, and other operations cannot be performed during acidification; ④It is difficult to implement acidification and blockage removal operations on a large scale; ⑤High operating costs

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