特高含水期强化采液提高采收率可行性分析  

Feasibility analysis of enhanced liquid production mechanics in extra high water cat period

作　　者：张海燕[1] 

机构地区：[1]中国石化股份胜利油田分公司地质科学研究院,山东东营257015

出　　处：《油气地质与采收率》2010年第2期77-79,共3页Petroleum Geology and Recovery Efficiency

摘　　要：历经40多年注水开发,胜利油区已整体处于特高含水开发阶段。为论证特高含水期强化采液改善油田开发效果的可行性,结合室内实验和微观网络模拟,论述了特高含水期强化采液提高采收率的内在机理。研究结果表明,驱替压力梯度越大,造成孔隙和喉道未驱替的几率越小,活塞式驱替发生的几率越大,因此,提高驱替压力梯度能够有效提高驱油效率,当驱替压力梯度由0.125MPa/m提高到1.14MPa/m时,驱油效率提高16%。同时,从矿场统计分析的角度论证了强化采液的有效性,胜坨油田144口高含水期强化采液井平均单井增加可采储量6226t,截至2009年底单井增油量为4592t。所以,强化采液仍是特高含水期增加产油量和可采储量的有效调整措施。After more than 40 years of water-flooding,Shengli Oilfield has already entered the extra high water cut stage.In order to discuss the feasibility of enhanced liquid production in extra high water cut period,this paper discusses the inherent mechanism of en-hanced liquid production based on the lab experiment and microcosmic network simulation.It is demonstrated that the higher the displacement pressure gradient,the more the throat and pores will be flooded,and the higher probability of piston displacement will occur.When the displacement pressure gradient increases from 0.125MPa/m to 1.14MPa/m,the displacement efficiency will increase by 16%.Moreover,this paper also discussed the availability of enhanced liquid production based on field statistics and a-nalysis:144 wells of Shengtuo oilfield have good performance with average recoverable reserves increased by 6226t and average crude output increased by 4593t till 2009.

关 键 词：特高含水期 强化采液 驱替压力梯度 相对渗透率 随机网络孔隙模型 微观渗流模式 驱油效率 

分 类 号：TE357[石油与天然气工程—油气田开发工程]