复合压裂技术在大庆油田Ⅱ、Ⅲ类致密储层的应用  

Study and application of composite fracturing technique in Class Ⅱ and Ⅲ tight reservoirs in Daqing Oilfield

作　　者：马克新 MA Kexin(Downhole Service Company of PetroChina Daqing Oilfield Co Ltd,Daqing 163453,China)

机构地区：[1]中国石油大庆油田有限责任公司井下作业分公司,黑龙江大庆163453

出　　处：《大庆石油地质与开发》2022年第4期161-167,共7页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项“低渗、特低渗复杂油藏规模有效动用关键技术”(2017ZX05013-006)。

摘　　要：针对常规缝网压裂措施无法有效动用大庆油田Ⅱ、Ⅲ类致密储层的问题,借鉴长庆油田成功试验经验,开展复合压裂技术攻关与试验。通过深化地质特征认识,以储层分类、复合压裂层段组合设计、缝网与井网匹配设计、复合压裂工艺设计形成适合大庆外围油田F油层Ⅱ、Ⅲ类致密储层的复合压裂技术,实现储量控制最大化、储层改造最大化。结果表明:大庆油田X13试验区17口复合压裂措施井初期平均单井日增油4.1 t,是试油井平均单井日增油的1.63倍,措施井采油强度为0.56 t/(d·m),是试油井采油强度的1.44倍;应用复合压裂技术的试验区阶段累计产油6 305 t,预计单井增加可采储量1 500 t以上,是常规缝网压裂措施的2.5倍以上。研究成果为大庆油田F油层致密油Ⅱ、Ⅲ类储层的有效动用提供了新的思路。In view of the problem that conventional fractures network fracturing stimulation cannot effectively produce Class Ⅱ and Ⅲ tight oil reservoirs in Daqing Oilfield, research and tests of composite fracturing technique are carried out based on the successful test experience of Changqing Oilfield. Through deepening understanding on reservoir characteristics, composite fracturing technique suitable for Class Ⅱ and Class Ⅲ tight reservoirs of F reservoir in peripheral oilfields in Daqing is developed by reservoirs classification, fracturing intervals combination,matching between fractures and well pattern, and composite fracturing so as to maximized reserves controlled and maximized reservoirs stimulated. The results show that initial daily oil increment of 17 stimulated wells in X13 test area is 4.1 t,which is 1.63 times of oil testing wells,and oil production intensity of stimulated wells is0.56 t/(d·m),which is 1.44 times of oil testing wells. Cumulative oil production in test area is 6 305 t,and recoverable reserves of single well are expected to increase by more than 1 500 t,which is more than 2.5 times of conventional fractures network fracturing stimulation. The research provides a new idea for effective production of Class Ⅱand Ⅲ tight oil reservoirs in F reservoir of Daqing Oilfield.

关 键 词：复合压裂 储层分类 Ⅱ、Ⅲ类致密储层 层段组合 裂缝与井网匹配性 储量控制 储层改造 

分 类 号：TE357[石油与天然气工程—油气田开发工程]