利用水驱曲线寻找小断块油藏剩余油

Looking for the Remaining Oil in Little Fault Block Reservoir by Water Drive Curve

秦学成 唐建信

QIN Xue-cheng TANG Jian-xin

中石化 华东分公司 规划设计研究院, 江苏 南京 210036; 中石化 华东分公司 开发处, 江苏 南京 210036

The Planning & Design Academe of East China Company, SINOPEC, Nanjing 210036, China; The Development Department of East China Company, SINOPEC, Nanjing, 210036, China

文章利用甲型水驱曲线b/a值来研究水驱油藏开采后期剩余油的分布情况,并应用在苏北CS油田戴一段和XNZ油田垛一段两底水油藏中。油藏数值模拟等研究方法结果与用该方法判断所得结果相吻合,其剩余油富集区已被小尺寸套管开窗侧钻定向井和开发调整井所验证,均获得日产超过20t的工业油流。实际应用表明,对于小断块油藏寻找剩余油,此文提供的方法简单并且实用。

Using the value b/a in type A water drive curve, the paper studies the distribution features of the remaining oil in the late waterflood reservoir, and the result was applied in bottom water drive reservoirs in Daiyi segment of Subei CS oilfield and Duoyi segment of XNZ oilfield. This result is equal to the reservoir simulation result. The remaining oil zone in those two reservoirs was tested by slim-hole milled window in casing sidetracking directional well and the developing adjustment wells. The oil rate of new well is more than twenty tones one day. The application of the method shows that the method is practical and simple in looking for the remaining oil of fault block reservoir.