二段直线法预测高含水期油田开发指标  

Two Straight Lines to Forecast Development Index of High Water-Cut Oilfield

作　　者：高丽[1] 宋考平[1] 马春华[1] 李丽丽[1] 

机构地区：[1]大庆石油学院提高油气采收率教育部重点实验室,黑龙江大庆163318

出　　处：《石油钻探技术》2008年第5期72-74,共3页Petroleum Drilling Techniques

基　　金：国家自然科学基金项目"油层多孔介质内纳米渗流动力学模型"(编号:10172028);国家自然科学基金项目"低渗透油层提高驱油的机理研究"(编号:50634020);黑龙江省杰出青年基金项目"油层多孔介质内纳观渗流界面作用力研究"联合资助

摘　　要：高含水期马克西莫夫-童宪章（甲型）水驱规律曲线发生上翘，用于油田动态分析时误差较大，分析认为曲线上翘的原因是，油水相对渗透率比（Kro／Krw）与含水饱和度（Sw）在半对数坐标系下，高含水期曲线直线段再次发生向下偏折，出现第二段直线段。在此基础上引进了二段直线法，即甲型水驱规律曲线在中含水期及高含水期各成直线段。运用几种水驱规律曲线公式，分别计算了大庆油田杏北开发区西部过渡带和杏四～六面积区块未措施井的可采出储量，并验证了累积产油量和含水率。结果表明，高含水期二段直线法优于甲型、西帕切夫（丙型）和张金庆型水驱规律曲线。Type A water drive curve will be up-warping with high water cur, which will cause remarkable errors in dynamic analysis of oilfield. The reason is that the Kro/Krw Vs. Sw under semi-log coordinate creates a second straight line. Therefore, two straight lines was introduced. Recoverable reserves of western ecotone and four to six block area of Xingbei development zone in the Daqing Oilfield were calculated, the cumulative oil production and water cut were validated. The result shows that this method is better than type A water drive curve, type C water drive curve and Zhang Jinqing water drive curve.

关 键 词：高含水期 可采储量 水驱 驱替特征曲线 

分 类 号：TE328[石油与天然气工程—油气田开发工程]