深井水力喷射压裂可行性分析及设计计算  

Feasibility Study and Treatment Design of Hydrojet-Fracturing in Deep Wells

作　　者：李根生[1] 夏强 黄中伟[1] 田守嶒[1] 盛茂[1] 曲洪娜[3] 

机构地区：[1]油气资源与探测国家重点实验室(中国石油大学(北京)),北京102249 [2]中海油研究总院,北京100027 [3]中国石化国际石油勘探开发有限公司,北京100083

出　　处：《石油钻探技术》2011年第5期58-62,共5页Petroleum Drilling Techniques

基　　金：国家自然科学基金项目"高压水射流喷射压裂机理研究"(编号:50774089);国家科技重大专项课题"水力射孔与分段压裂一体化改造增产技术"(编号:2009ZX05009-005)资助

摘　　要：常规深井压裂面临井底破裂压力大、地面施工泵压高、井下封隔器高温失效等问题,需要探索新的增产改造技术。介绍了水力喷射压裂技术及水力喷砂射孔机理、水力喷射压裂机理、水力喷射压裂工具组合。同时分析了其技术特点,分析认为,该技术具有射孔孔眼直径大、射孔深度长、可降低井底破裂压力、无需机械封隔等优点。在进行深井水力喷射压裂可行性分析的基础上,计算了某深井水力喷射压裂工艺技术参数,校核了深井压裂管柱强度,计算了油管排量、环空排量、油管压力和环空压力等水力喷射压裂水力参数及井口压力。分析和计算结果表明,深井水力喷射压裂切实可行。Conventional fracturing treatment in deep wells face high bottomhole fracturing pressure,high pump pressure and malfunction of packer resulting from high temperature,all these require a new production improvement technology.This paper presents hydrojet-fracturing,a unique and relatively new stimulation technology,and summarizes sand jet perforation mechanism,hydrojet-fracturing mechanism and hydrojet-fracturing tool assembly.This hydrojet-fracturing technique has the characteristics of larger diameter and deeper length perforation compared conventional perforation,and no need for mechanical packer.A deep wells fracturing feasibility analysis was conducted.The fracturing parameters were calculated for a deep well.The strength of fracturing string,pipe displacement,annulus displacement,tubing pressure,annulus pressure,injection wellhead pressure etc.was checked.The analysis and calculation results show that hydrojet-fracturing in deep wells is feasible.

关 键 词：深井 水力喷射 酸化压裂 地层破裂压力 可行性研究 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]