石油钻采工艺2011，Vol.33Issue(3)：31-34,4.
冀东油田绒囊修井液控制储层伤害应用研究
Fuzzy-ball workover fluids for formation damage control in Jidong Oilfield
摘要
Abstract
In view of the difficulties during workover treatments in Jidong Oilfield, such as circulation loss, slow water cut recovering, serious formation damage, a novel technique named Fuzzy-Ball was applied based on the temporary blocking mechanism analysis of Fuzzy-Ball workover fluids. The Fuzzy-Ball can self-match leak passages completely during workover, and then flow back automatically from formation. Laboratory evaluation showed that the workover fluids could be stable for more than IS days, enhance formation pressure bearing capacity, up to 7 Mpa, and invade formation less than 8 cm. What is more, the core permeability can recover up to 90%. Well L12-6 and NP23-X24091 are two examples for the application effects. The water cut of well L12-6 recovered only in 3 days, oil productivity increased more than 3 tons per day and water cut reduced by 30% after the pump inspection by Fuzzy-Ball workover fluid. For well NP23-X24091, formation bearing pressure capacity was enhanced up to 6~7.5 Mpa after the fuzzy-ball workover fluid blocking formation and squeezing cement, oil productivity increased more than 10 tons per day, and water cut reduced by 5%. The indoor and onsite experiments proved that the Fuzzy-Ball workover fluid had good effect of blocking and less damage to formations.关键词
绒囊/修井液/暂堵/储层伤害/恢复产能/承压能力Key words
Fuzzy-Ball/ workover fluid/ temporary blocking/ formation damage/ recovery productivity/ pressure bearing capacity分类
能源科技引用本文复制引用
李良川,卢淑芹,彭通,张明伟,米凡..冀东油田绒囊修井液控制储层伤害应用研究[J].石油钻采工艺,2011,33(3):31-34,4.基金项目
国家科技重大专项“大型油气田及煤层气开发”子课题(编号:2008ZX05024-04-005)和教育部“长江学者和创新团队发展计划”(编号:IRT0411)联合资助. （编号:2008ZX05024-04-005）
