李年银,赵立强,张倩,杨欢,刘萍
LI Nian-yin1,ZHAO Li-qiang1,ZHANG Qian2,YANG Huan3,LIU Ping4(1.State Key Laboratory of Oil/Gas Reservoir and Development

• 1:西南石油大学油气藏地质及开发工程国家重点实验室
• 2:西南油气田分公司天然气研究院
• 3:长江大学化学工程学院
• 4:中国石化西南石油局工程技术研究院

摘要(Abstract)：

缝高控制是压裂酸化改造成功的关键因素之一,而缝高控制又与裂缝高度延伸诊断密切相关,影响裂缝高度延伸的因素主要归结为可控和不可控因素两类,从地层应力、岩石物性和施工参数等方面对裂缝高度延伸的主要影响因素进行分析,提出了根据裂缝延伸k判据、裂缝净压力与储层应力差的比值、裂缝净压力双对数曲线形态等三种裂缝高度延伸诊断方法。结合压裂酸化工艺特点,从降低地层破裂压力、人工隔层控缝高、降滤失控缝高、工作液体系控制、平衡酸压工艺、完井方案优化、施工压力监控等方面讨论了压裂酸化过程中的各种裂缝高度控制技术。
Controlling the fracture height is one of the key factors that determine fracturing/acid-fracturing successful or not.The diagnosis of artificial fracture vertical extension is interdependent to the control technique.In these aspects,researcher made seldom work.The dominant factors that affect fracture height may include controllable factor and uncontrollable factor.In this paper,analysis is conducted in aspects of in-situ stress influences,rock physical property and treatment parameters.The paper presents the diagnosis of fracture vertical extension,include fracture extension"k"criterion,the ratio of fracture net pressure and in-situ stress difference,fracture net pressure double logarithmic curve.Combining with fracturing/acid-fracturing treatment characteristics,discussions are conducted also from perspectives of control fracture height by reducing stratum bursting pressure,artificial insulation,fluid loss control,as well as from the liquid system,the well completion plan optimization,the treatment pressure monitoring and so on.

关键词(KeyWords)： 压裂酸化;裂缝延伸;缝高控制;诊断方法;影响因素
acid-fracturing;fracture extension;fracture height control;diagnosis method;influential factor

Abstract:

Keywords:

基金项目(Foundation): “油气藏地质及开发工程”国家重点实验室基金项目(PLN0138)的部分研究成果

作者(Author): 李年银,赵立强,张倩,杨欢,刘萍
LI Nian-yin1,ZHAO Li-qiang1,ZHANG Qian2,YANG Huan3,LIU Ping4(1.State Key Laboratory of Oil/Gas Reservoir and Development

参考文献(References)：

• [1]Liu Shuzhi,Ren Shuquan,Zhao Jinzhou.The fracturing technique tolimit hydraulic fracture height growth put into effect successfully in xin-jiang oil field[R].SPE39516.
• [2]Talbot D M,Hemke KA.Stimulation fracture height control above wa-ter or depleted zones[R].SPE60318.
• [3]李年银,赵立强,刘平礼,等.裂缝高度延伸机理及控缝高酸压技术研究[J].特种油气藏,2006,13(2):61-63.
• [4]卢修峰,刘凤琴,韩振华.压裂裂缝垂向延伸的人工控制技术[J].石油钻采工艺,1995,17(1):82-89.
• [5]胡永全,任书泉.水力压裂裂缝高度控制分析[J].大庆石油地质与开发,1996,15(2):56-57.
• [6]何岱海,曲展,徐建学,等.控缝高水力压裂中支撑剂和隔离剂输送规律[J].西安石油学院学报,1998,13(5):20-21.
• [7]M J埃克诺米德斯,K G若尔蒂.油藏增产措施(第三版)[M].北京:石油工业出版社,2002:303-304.
• [8]Tlnker S J.Equilibrium acid fracturing:a new frature acidizing tech-nique for carbonate formations[R].SPE18883.