重复压裂高效暂堵剂研制与评价  

Research and assessment of high efficiency temporary plugging agent used for refracturing

作　　者：闫治涛[1] 

机构地区：[1]胜利油田东胜精攻石油开发集团股份有限公司,山东东营257000

出　　处：《中国工程科学》2012年第4期20-25,共6页Strategic Study of CAE

摘　　要：根据中浅层油气藏重复压裂暂堵老缝压开新缝,以及压裂过程控制裂缝转向的需要,研制了一种新型的高效缝内暂堵剂,并通过实验评价了暂堵剂产生暂堵的机理,包括暂堵材料粒度、注入流量和浓度等对暂堵效果的影响;并对暂堵后裂缝延伸及压后返排对气井生产的影响进行了非线性有限元数值分析,研究表明该暂堵剂具有良好的暂堵效果,对气井无二次污染,并在重复压裂中对气层起到了很好的保护作用。Mter a period of time of production, in some wells, the crude oil at the old crack has basically been taken out, but there＇ s certain amount of recoverable reserves. In order to improve the efficiency of these wells, refracturing is required. Temporary plugging agent in refracturing plays a very important role; it is the key to the success of refracturing. In this article, a new kind of temporary plugging agent has been developed, we have done lots of laboratory testing researches about its performance and temporary plugging effect. And, non-linear fi- nite element numerical simulation analysis has been adopted for temporarily blocking crack and the impact of the wells. It is can be seen from the experiment and finite element analysis that the new temporary plugging agent has a good effect; it has no secondary pollution of wells. Temporary plugging agent can provide protection for wells, and it has a good prospect.

关 键 词：重复压裂 暂堵剂 裂缝转向 非线性有限元分析 气层保护 

分 类 号：TE256.6[石油与天然气工程—油气井工程]