油井重复压裂工艺技术研究  

Refracturing technology in Oil wells

作　　者：雷群[1] 张书平[1] 常彦荣[2] 

机构地区：[1]长庆石油勘探局钻采工艺研究院,陕西西安长庆兴隆园710021 [2]长庆石油勘探局采油三厂,宁夏盐池大水坑751506

出　　处：《钻采工艺》2000年第1期24-27,共4页Drilling & Production Technology

摘　　要：重复压裂工艺技术是低渗透油田增加单井产量、确保油田稳产、提高经济效益的关键手段。文中对长庆低渗透油田的产量递减因素进行了详细的分析，认为地层压力下降会引起孔隙度下降、含水饱和度上升。并结合近几年重复压裂工艺的现场实践，提出了重复压裂井的选井条件：①初次压裂规模小的井；②初次压裂失败的井；③初次压裂产生了伤害的井；④初次压裂工艺落后的井，如裂缝导流能力低；⑤地层压力保持在原始压力的８０ ％ 以上。The refracturing plays a very important role in increasing oil well production,stabilizing oil field productivity and improving the economic benefit of low permeability reservoirs.This paper analyzes in detail the reason that causes the production decline in Changqing Oilfield,and concluded that a drawdown of formation pressure might cause the porosity to decline and the water saturation to increase.Based on the field experience of refracturing technology in recent years,points out that the following kinds of well could be selected as candidates for refracturing:①wells which are primarily fractured in a small scale;②wells which are failed during primary fractured stimulation;③wells which are damaged during first fracturing stimulation;④wells which are primarily fractured which backward techniques;⑤wells of who the formation pressure is still above 80% of the original pressure.

关 键 词：低渗透油气藏 重复压裂 选井 压裂工艺 

分 类 号：TE357[石油与天然气工程—油气田开发工程]