塔河油田稠油替喷工艺

Technique of Displaced flow of Heavy Oil in Tahe Oilfield

塔河油田的稠油埋深在5400 m以下,属正常温度压力系统。稠油在油藏条件下具有一定的流动性和较好的供油能力,但进入井筒后,随着井筒温度的降低,在距井口3000 m左右逐渐失去流动性,原油无法流到井口。针对塔河油田的实际,采用掺稀油井筒降粘方法,配合常规完井替喷管柱和配压完井替喷管柱,较好的解决了稠油替喷开采的技术难题。

The depth of heavy oil reservoir in Tahe Oilfield is more than 3400m,and the reservoir has a normal temperature system and normal pressure system.The heavy oil can flow in reservoir condition,but when after entering wellbore,as the wellbore temperature decreses,it becomes heavier and heavier,at the depth about less than 300m,it can not flow any more,and so it is not able to flow to the wellhead.This difficult problem is solved by adding some thin oil into wellbore to reduce the viscosity of the crude oil there,and combining displaced flow string for conventional completion.