Continuous injecting and acidizing unit for water injection well

Abstract

The invention belongs to the technical field of waterflooding extraction of oilfields, and particularly provides a continuous injecting and acidizing unit for a water injection well. The continuous injecting and acidizing unit for the water injection well consists of an acid liquor storage tank (1), a hydraulic double-diaphragm metering pump (2), a control system (3), an acid liquor pipeline system (4), an online monitoring system (5) and a truck moving system, wherein the acid liquor storage tank (1) is connected with the hydraulic double-diaphragm metering pump (2); an outlet of the hydraulic double-diaphragm metering pump (2) is connected with the acid liquor pipeline system (4); the control system (3) is connected with the hydraulic double-diaphragm metering pump (2); the online monitoring system (5) is connected with the acid liquor pipeline system (4); and a shared steel base of the acid liquor storage tank (1), the hydraulic double-diaphragm metering pump (2) and the control system (3) is connected with a chassis of the truck moving system. Efficient, quick and large-scale plug removal of the water injection well is implemented, water injection pressure is reduced, and water injection amount is increased.

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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