Optimization of Casing Program for HTHP Deep Exploratory Wells in Block Xihu of East China Sea
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摘要: 为解决东海西湖区块原有井身结构存在的问题及井壁稳定差、井下故障多等问题,参考海上常规探井自上而下的井身结构设计方法,根据地质必封点和地层压力分布确定技术套管的尺寸、层次和下入深度;根据地质目标、井控能力和完井测试要求确定表层套管和完井套管的尺寸和下入深度.优化后的井身结构为:φ508.0 mm表层套管下至井深600.00 m左右,封固不稳定地层并建立井口,提供充足的井控能力;φ339.7 mm技术套管加深下至井深2 400.00 m左右,封固不整合面和煤层等不稳定地层;φ244.5 mm技术套管加深下至井深4 000.00 m左右,封固压力过渡带,保证打开储层时具有良好的承压能力;同时,在2 400.00~4 000.00 m井段备用φ298.4 mm技术套管封隔特别复杂地层,避免深部出现小井眼井段和储层测试困难的现象.东海西湖区块的2口直井采用了优化后的井身结构,与采用原井身结构的邻井相比,优化后的井身结构成功封隔了复杂地层,有效减少了井下故障,避免了钻井工程事故的发生,实现了安全高效钻井.Abstract: To solve the problems of poor borehole stability and frequent downhole malfunction in original casing program designs in Block Xihu of East China Sea,optimization method took conventional exploration well design principles as reference in which geological setting position and formation pressure distribution were utilized to determine casing size,level and setting depth.Based on geological condition,well control ability and completion operations,the size and depths of surface casing and completion casing were determined.The optimized casing program is as:φ508.0 mm surface casing around the depth of 600.00 m to cement unstable formations and to set up wellhead with adequate well control ability;φ339.7 mm intermediate casing at the depth of 2 400.00 m to plug complex formations as unconformity and seam;the φ244.5 mm intermediate casing around the depth of 4 000.00 m to plug the pressure transitional belt ensuring enough pressure capacity when drilling through the reservoir.At the same time,a φ298.4 mm intermediate casing from well depth 2 400.00 to 4 000.00 m well section for particularly complex formations to avoid low ROP and well testing difficulty in deep slim hole.The optimized casing program have been used in two vertical wells Block Xihu of East China Sea.Compared with adjacent wells with original casing design,it successfully plugged complex formations,reduced downhole problems,avoided drilling accidents and achieved safe and efficient drilling operations.
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Keywords:
- high temperature /
- high pressure /
- deep exploratory well /
- casing program /
- East China Sea /
- Block Xihu
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[1] 李敏,陈永进,姜文斌.西湖凹陷平湖组岩性油气藏形成条件[J].油气地质与采收率,2012,19(2):23-25. Li Min,Chen Yongjin,Jiang Wenbin.Hydrocarbon accumulation conditions for lithologic reservoirs in Pinghu formation,Xihu depression[J].Petroleum Geology and Recovery Efficency,2012,19(2):23-25. [2] 张娟.西湖凹陷平湖油气田断层评价[J].油气地质与采收率,2012,19(4):18-20. Zhang Juan.Study on fault-sealing in Pinghu oil and gas field,Xihu depression[J].Petroleum Geology and Recovery Efficency,2012,19(4):18-20. [3] 唐志军.井身结构优化设计方法[J].西部探矿工程,2005,17(6):78-80. Tang Zhijun.Preliminary study on optimization of casing program[J].West-China Exploration Engineering,2005,17(6): 78-80. [4] 吴建忠.川东北深井井身结构优化探讨[J].石油地质与工程,2009,23(2):88-90,93. Wu Jianzhong.Discussion about optimization of deep well bore frame in NortheastSichuan[J].Petroleum Geology and Engineering,2009,23(2):88-90,93. [5] 唐志军.川东北河坝区块井身结构的优化与实践[J].石油钻探技术,2011,39(1):73-77. Tang Zhijun.Casing optimization and practice at Heba Block of Northeastern Sichuan Basin[J].Petroleum Drilling Techniques,2011,39(1):73-77. [6] 卫怀忠.西部地区深井井身结构设计技术探讨[J].石油钻探技术,2006,34(2):29-31. Wei Huaizhong.Discussions on casing program design technology in Western China[J].Petroleum Drilling Techniques,2006,34(2):29-31. [7] 管志川,李春山,周广陈,等.深井和超深井钻井井身结构设计方法[J].石油大学学报:自然科学版,2001,25(6):42-44. Guan Zhichuan,Li Chunshan,Zhou Guangchen,et al.A method for designing casing program in deep and superdeep wells[J].Journal of the University of Petroleum,China:Edition of Natural Science,2001,25(6):42-44. [8] 步宏光,唐世忠,饶富培,等.大港油田井身结构优化研究与应用[J].石油钻采工艺,2011,33(4):105-108. Bu Hongguang,Tang Shizhong,Rao Fupei,et al.Research and application of Dagang Oilfield casing program optimization[J].Oil Drilling Production Technology,2011,33(4):105-108. [9] 刘小刚,崔治军,陶林,等.渤海油田科学探索井井身结构优化设计[J].断块油气田,2011,18(5):663-665. Liu Xiaogang,Cui Zhijun,Tao Lin,et al.Optimization design of wellbore structure for scientific exploration well in Bohai Oiifield[J].Fault-Block Oil Gas Field,2011,18(5):663-665. [10] 刘彪,白彬珍,潘丽娟,等.托甫台区块含盐膏层深井井身结构优化设计[J].石油钻探技术,2014,42(4):48-52. Liu Biao,Bai Binzhen,Pan Lijuan,et al.Casing program of deep well with evaporite bed in Tuofutai Block[J].Petroleum Drilling Techniques,2014,42(4):48-52. [11] 杨玉坤.川东北地区深井井身结构优化设计[J].石油钻探技术,2008,36(3):33-36. Yang Yukun.Deep well casing structure optimization in Northeast Sichuan Area[J].Petroleum Drilling Techniques,2008,36(3):33-36. [12] 唐志军,邵长明.钻井工程设计优化与应用[J].石油地质与工程,2007,21(3):75-78. Tang Zhijun,Shao Changming.Drilling engineering design optimization andapplication[J].Petroleum Geology and Engineering,2007,21(3):75-78. [13] 关德,罗勇,张海山.西湖凹陷低孔低渗深探井井身结构优化研究与应用[J].中国海上油气,2013,25(2):61-63. Guan De,Luo Yong,Zhang Haishan.The optimal research and application of casing program in low porosity and low permeability deep exploratory wells in Xihu Sag,East China Sea[J].China Offshore Oil and Gas,2013,25(2):61-63. [14] 葛鹏飞,马庆涛,张栋.元坝地区超深井井身结构优化及应用[J].石油钻探技术,2013,41(4):83-86. Ge Pengfei,Ma Qingtao,Zhang Dong.Optimization and application of ultra-deep well casing program in Yuanba Area[J].Petroleum Drilling Techniques,2013,41(4):83-86. [15] 刘绘新,张鹏,熊友明.合理井身结构设计的新方法研究[J].西南石油学院学报,2004,26(1):19-22. Liu Huixin,Zhang Peng,Xiong Youming.A new method of well structure design by salt rock creep pressure profile[J].Journal of Southwest Petroleum Institute,2004,26(1):19-22. [16] 管志川,柯珂,苏堪华.深水钻井井身结构设计方法[J].石油钻探技术,2011,39(2):16-21. Guan Zhichuan,Ke Ke,Su Kanhua.Casing design and optimization for deepwater drilling[J].Petroleum Drilling Techniques,2011,39(2):16-21. -
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