摘要
昌吉油田吉7井区二叠系梧桐沟组稠油油藏探明石油储量超过7000万吨,油藏埋深1317.0m^1775.0m;平均地层原油粘度458.3m Pa·s;20℃时,平均脱气油相对密度0.9276g/cm3;属于普通稠油—特稠油范畴。目前国内外尚无类似油藏开发的成功先例可供借鉴,因此确定该油藏合理开发方式至关重要。2011年9月开辟吉008常温水驱试验区,通过近3年注水试验,取得很好的注水效果。确定该油藏地面原油粘度小于1850m Pa·s区域可以采用常温注水开发,预测水驱采收率可达20%。
There are exceed 70 million tons proven heavy oil reservoir in Permian Wutonggou formation of Ji-7well area of Changji oilfield.The buried depth of the reservoir is from 1317.0m to 1775.0m.The average formation oil viscosity is 458.3m Pa.s,and the relative density is 0.9276 g / cm3 under 20℃.It belongs to ordinary heavy oil — super heavy oil.There is no successful development precedent at home and abroad for these reservoirs up to now.Therefore,it is very important to determine the reasonable development mode of the reservoir.Ji-008 normal temperature waterflooding test area has been opened up in Sep.2011.The water injection has obtained very good result through nearly 3 years test.The development mode of normal waterflooding can be used in the deep heavy oil reservoir where the surface viscosity of the crude oil under 50℃is less than 1850 m Pa.s,and the predicted water flooding recovery is up to 20%.
出处
《新疆石油天然气》
CAS
2014年第4期58-61,4,共4页
Xinjiang Oil & Gas
关键词
吉7井区
深层稠油
常温注水
效果评价
Ji-7 well area
Deep heavy oil
Normal temperature waterflooding
Effect evaluation
