保护油气层的完井管柱技术

The Well Completion Pipe String Technique of Oil and Gas Formation Protection

在油气田开发过程中 ,洗井液、压井液、完井液易进入地层 ,使储油气层受到污染和损害。为了保护油气层 ,研究完井生产管柱技术 ,在洗井或压井作业中 ,在封隔器下部的工作筒内投入一个堵塞器 ,再将封隔器以上的侧门打开 ,建立循环 ,使压井液与射孔油气层隔离 ,起到保护油气层的目的。

In development process of oil-gas field ,flushing fluid,well killing fluid and completion fluid invaded strata,will pollute and injure formation,and reduce effective permeability of the formation. So it will effect production rate of the well,even lead to shut-in well.We can run in a set of production string,and drop in a blanking plug inside the mandrel in lower packer,and then open the side door on the packer,so as to set up circulation and isolate well killing fluid and perforated interval,thereby protect the formation,during washing well and killing well operation.