胜科1井钻头选型与应用效果分析
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摘要
完钻井深7 026 m的胜科1井是我国东部油区目前最深科学探索井,在施工中除因复杂多变的地层孔隙压力致使其井身结构复杂、施工难度增大外,上部厚盐膏层、软泥岩和深部地层在高温、高压条件下可钻性变差等,极大制约了钻井速度的提高。为提高钻井速度,利用室内试验和测井资料建立了地层可钻性剖面和地层可钻性预测剖面,应用钻头技术效益指数最高的经验钻头选型方法对钻井资料进行了统计分析,根据地层可钻性剖面和统计分析结果推荐了与胜科1井地层相适应的钻头初步选型方案,给出了该井三开后的钻头选型推荐方案和建议。对钻头选型方案实施过程进行了跟踪并对所选钻头的使用效果进行了分析。分析结果表明,虽然钻井速度得到了提高,但没有达到预期的目标,应进一步进行深部地层岩石工程力学特性和钻头选型的研究。
Well Shengke-1,with a 7026m completed depth,is the deepest scientific exploration well in the east oilfield in China so far.The drilling rate was restricted by long salt-gypsum bed,soft mudstone in top formation and poor drillability in deep formation due to high pressure and high temperature,along with complex wellbore structure and difficulty in implementation due to the variable formation pore pressure.In order to increase drilling rate,the formation drillability profile and formation drillability prediction profile were created based on experiments and well logging data,the drilling data were analyzed based selection method of the performance.Given the formation drillability profile and the statistical analysis results the drill bit selection was proposed along with the recommended drill bit and suggestions after third section.Application results indicate that the drilling rate was increased while not reach the expected;therefore the more research on the rock mechanics and bit type selection should be conducted.
Well Shengke-1,with a 7026m completed depth,is the deepest scientific exploration well in the east oilfield in China so far.The drilling rate was restricted by long salt-gypsum bed,soft mudstone in top formation and poor drillability in deep formation due to high pressure and high temperature,along with complex wellbore structure and difficulty in implementation due to the variable formation pore pressure.In order to increase drilling rate,the formation drillability profile and formation drillability prediction profile were created based on experiments and well logging data,the drilling data were analyzed based selection method of the performance.Given the formation drillability profile and the statistical analysis results the drill bit selection was proposed along with the recommended drill bit and suggestions after third section.Application results indicate that the drilling rate was increased while not reach the expected;therefore the more research on the rock mechanics and bit type selection should be conducted.
引文
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[2]饶永久.一种新的钻头优选方法——YH钻头优选法[J].石油钻探技术,2000,28(6):17-19.
[3]陈波,于文华,文平,等.Q2-24井钻头优选试验研究[J].石油钻探技术,2004,32(1):66-68.
[4]卢春阳,陈济峰,杨海滨,等.海南福山凹陷地层可钻性及钻头选型[J].石油钻探技术,2002,30(1):10-12.
[5]高德利,张辉,王家祥.地层岩性与钻头工况的评估方法研究及其应用[J].石油钻采工艺,1998,20(1):8-11.
[6]路保平,鲍洪志.岩石力学参数求取方法进展[J].石油钻探技术,2005,33(5):44-47.
[7]梁启明,邹德永,张华卫,等.利用测井资料综合预测岩石可钻性的试验研究[J].石油钻探技术,2006,34(1):17-19.
[8]梁彩芳.测井及地震资料在钻井工程中的应用[J].石油钻探技术,2003,31(3):26-28.
[9]常领,陈华忠.PDC钻头在胜利油田深井钻井中的应用[J].石油钻探技术,2007,35(4):92-93.
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