砾岩油藏采收率理论公式推导与应用  

Derivation and Application of Theoretical Recovery Factor Formula in Conglomerate Reservoir

作　　者：杨新平[1] 陈光喜[1] 姜瑞忠[2] 王玉多 张利锋[1] 

机构地区：[1]中国石油新疆油田分公司,新疆克拉玛依834000 [2]中国石油大学(华东),山东青岛266580 [3]克拉玛依地质工程有限责任公司,新疆克拉玛依834000

出　　处：《特种油气藏》2016年第5期96-99,共4页Special Oil & Gas Reservoirs

基　　金：中国石油天然气股份有限公司"新疆大庆"科技重大专项"砂砾岩油藏提高采收率技术研究与应用"(2012E-34-07)

摘　　要：为从理论角度分析砾岩油藏各影响因素与采收率之间的函数关系,根据油田实际生产情况,结合非活塞式水驱油基础渗流理论,综合考虑渗透率、孔隙度、储层非均质性、油水黏度比、相渗参数、井网参数等因素对波及系数的影响,推导出变截面B-L方程,在此基础上得到了砾岩油藏采收率的理论公式。计算克拉玛依油田13个砾岩油藏的采收率可知,中、低渗砾岩油藏理论公式结果与动态分析法的平均相对误差仅为3.5%,表明方法准确、可靠。该方法可以从理论角度计算不同储层条件不同井距下的理论采收率,从而为砾岩油藏合理井网、井距的确定提供决策依据。In order to theoretically analyze the effects of each factor on recovery factor in conglomerate reservoir,actual field production data and non-piston waterflooding theory are used to derive a variable cross-section B-L equation by comprehensively considering the effects of reservoir permeabil-ity,porosity,heterogeneity,oil-water viscosity ratio,relatively permeability,well network parameters and other aspects on sweep efficiency. In addition,a theoretical recovery factor formula for conglomerate reservoir is gained based on this derivation. This theoretical recovery factor formula is applied in 13 conglomerate reservoirs of Karamay Oilfield,which gains accurate and reliable predictions. The average relative error between theoretical calculation and production analysis is only 3. 5% in medium and low permeability conglomerate reservoirs. The theoretical recovery factors under different reservoir properties and well spacings can be estimated by this method,which could provide a theoretical basis for the determination of reasonable well network and well spacing in conglomerate reservoir.

关 键 词：砾岩油藏 采收率 渗流理论 变截面B-L方程 克拉玛依油田 

分 类 号：TE349[石油与天然气工程—油气田开发工程]