塔河碎屑岩底水油藏“疏堵结合-控水新思路”

New method of water control combining oil-water simultaneous production with water shutoff in clastic bottom-water reservoirs,Tahe Oil Field

李建力 边青兰 何龙 李军 余璐

Li Jianli Bian Qinglan He Long Li Jun Yu Lu

中国石化 西北油田分公司 塔河采油一厂,新疆 轮台 841605 2. 中国石化 西北油田分公司,乌鲁木齐 830011

No.1 Tahe Production Plant,SINOPEC Northwest Company,Luntai,Xinjiang 841605,China 2. SINOPEC Northwest Company,Urumqi,Xinjiang 830011,China

针对塔河碎屑岩底水油气藏水侵(水锥和水窜)难以控制的问题,提出“疏堵结合”标本兼治的控水思路,即在打开上部油层的基础上,射开油水界面以下水层,通过油水同步分采,改变井筒周围水锥方向和水锥速度,根据地质特征和水窜情况,选择性配套“隔板”堵水作业。通过2种工艺有机结合实现抑制水侵,达到油水界面相对均匀的缓慢抬升的目的。从油藏、工艺2方面进行了可行性的论证,提出“疏堵结合”技术的关键点。

In elastic bottom-water reservoirs of the Tahe Oil Field, water invasions(water cones and break-throughs) are problems difficult to solve.A new method of water control combining oil-water simultaneousproduction with water shutoff was proposed.First,we opened the upper oil-bearing layer.Second,we perfora-ted into the bottom water layer.Oil and water were produced simultaneously,changing the direction and speedof water cones around well bore.Based on geologic characteristics and water breakthroughs,we usedplugging agent to shut water off selectively.Combining these two methods,we controlled water inva-sions and Yalsed Oil-water interface evenly and slowly.Feasibility of the new method was discussedfrom accumulation and technique aspects,and the key factors were pointed out.

https://doi.org/10.11781/sysydz2011S1095