昌吉油田吉7井区稠油油藏注水开发原油黏度界限  

Approach to Deep Heavy Oil Viscosity Limit by Waterflooding Process: A Case Study of Wellblock Ji-7 in Changji Oilfield, Junggar Basin

作　　者：谢建勇[1] 石彦[1] 梁成钢[1] 吴承美[1] 罗鸿成 武建明[1] 

机构地区：[1]中国石油新疆油田分公司准东采油厂,新疆阜康831511

出　　处：《新疆石油地质》2015年第6期724-728,共5页Xinjiang Petroleum Geology

摘　　要：由于经济和技术上的限制,深层稠油不适宜热采开发。国内一些稠油油藏采取常规注水开发,取得了较好的开发效果。如果原油黏度过大,水驱效果变差,当注水开发采收率低于经济极限时,就不再适合注水开发,因此原油黏度是决定能否进行注水开发的关键。准噶尔盆地昌吉油田吉7井区属于深层大型稠油油藏,埋藏深度大,原油黏度区间大。为确定注水开发稠油油藏原油黏度的界限,开展了现场注水开发试验和室内实验,确定了地层原油黏度小于2 470 m Pa·s的油藏均可实施注水开发,为吉7井区深层稠油油藏较大规模地投入注水开发提供了科学依据。The thermal recovery process is not appropriate to deep heavy oil reservoir development due to economic and technical con- straints, some domestic heavy oil reservoirs developed by conventional waterflooding process have achieved the better results. But with the crude oil viscosity increasing, the water flooding effect is getting worse and worse, and the recovery efficiency is lower than the related economic limit, this process is not suitable for such a reservoir. So viscosity is the key to determine whether such a reservoir is developed by waterflooding process or not. Wellblock Ji-7 in Changji oilfield of Junggar basin is a deep and large heavy oil reservoir with depth of 1 317- 1 836 m and oil viscosity of 40-3 000 mPa·s. This paper makes field water flooding test and lab experiment to determine the limit of oil vis- cosity suitable for waterflooding process. It is suggested that the reservoir with formation oil viscosity less than 2 470 mPa. s can be devel- oped by waterflooding process, which provides scientific basis for large-scale waterflooding development of Wellblock Ji-7 deep heavy oil reservoir.

关 键 词：准噶尔盆地 昌吉油田 吉7井区 深层稠油油藏 注水开发 原油黏度界限 

分 类 号：TE345[石油与天然气工程—油气田开发工程]