考虑方位漂移的水平井井眼轨道设计
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摘要
目前,深层页岩气水平井在钻井过程中经常出现方位漂移的问题,方位漂移严重影响了水平井的井眼轨迹控制,进而影响水平井的准确中靶。在现场施工中,通常根据施工区以前的钻井经验,在进行定向造斜时,先估计出一个"方位超前角",这种现场的做法有着很大的不确定性,并且可能出现较大误差。本文提出了考虑方位漂移的水平井井眼轨道优化设计的方法,解决了仅凭现场经验给出的"超前角"不准确的问题。考虑方位漂移的水平井井眼轨道优化设计按照井段划分,将地层因素与井身剖面结合起来求取井段的平均方位漂移率。根据该方法研制开发了考虑方位漂移的水平井井眼轨道优化设计软件,并通过举例进行了验证,证明了方法是可行的。
At present,the azimuth drift often occurs in the drilling process of deep shale gas horizontal wells,which seriously affects the trajectory control of the horizontal well,and then affects the accurate target of the horizontal well.In the field construction in this area,usually according to the previous drilling experience,an "advanced azimuth angle"should be estimated before the directional slanting is carried out,but there are a lot of uncertainties in this field practice and there may be some big error.In this paper,a method of horizontal well trajectory optimization design based on azimuth drift is proposed,which solves the inaccuracy of"advanced azimuth angle"only estimated by the field experience.The optimization design of horizontal well trajectory is devided according to the well sections;the average azimuth drift rate of the well section is obtained by combining the stratigraphic factors with the well profile.Based on this method,the software for the optimization design of horizontal well trajectory based on azimuth drift is developed.The feasibility of this method is proved by the examples.
At present,the azimuth drift often occurs in the drilling process of deep shale gas horizontal wells,which seriously affects the trajectory control of the horizontal well,and then affects the accurate target of the horizontal well.In the field construction in this area,usually according to the previous drilling experience,an "advanced azimuth angle"should be estimated before the directional slanting is carried out,but there are a lot of uncertainties in this field practice and there may be some big error.In this paper,a method of horizontal well trajectory optimization design based on azimuth drift is proposed,which solves the inaccuracy of"advanced azimuth angle"only estimated by the field experience.The optimization design of horizontal well trajectory is devided according to the well sections;the average azimuth drift rate of the well section is obtained by combining the stratigraphic factors with the well profile.Based on this method,the software for the optimization design of horizontal well trajectory based on azimuth drift is developed.The feasibility of this method is proved by the examples.
引文
[1]牛新明.涪陵页岩气田钻井技术难点及对策[J].石油钻探技术,2014,(4):1-6.
[2]刘修善,曲同慈,孙忠国,等.三维漂移轨道的设计方法[J].石油学报,1995,16(4):118-124.
[3]韩志勇,黄根炉.考虑方位漂移的单目标定向井轨道设计方法[J].中国海上油气,2005,17(1):38-40.
[4]唐雪平,苏义脑,陈祖锡.三维井眼轨道设计模型及应用[J].数学的实践与认识,2004,34(3):62-72.
[5]韩志勇.定向井设计与计算[M].北京:石油工业出版社,1989.
[6]何树山,刘修善.三维水平井轨道设计[J].石油钻采工艺,2001,23(4):16-20.
[7]陈庭根,管志川.钻井工程理论与技术[M].北京:中国石油大学出版社,2000.
[8]刘修善.井眼轨道几何学[M].北京:石油工业出版社,2006.
[9]段玉廷.三维定向井轨迹设计中对方位漂移的考虑[J].天然气工业,1989,9(1):25-29.
[10]刘修善,孙忠国.三维漂移轨道的设计方法[J].石油学报,1995,16(4):118-124.
[11]谷红陶,袁航,夏海帮.彭水页岩气水平井中靶技术与应用[J].油气藏评价与开发,2015,5(6):76-80.
[12]马鑫.火山岩气藏水平井探气顶优化设计研究[J].长江大学学报(自然版),2014,11(10):77-78.
[13]胡丰金,庞保军.定向井扭方位三维轨迹设计简易解析法[J].石油钻采工艺,1996,18(3):32-36.
[14]陈安明,张辉,宋占伟.页岩气水平井钻完井关键技术分析[J].石油天然气学报,2012,34(11):98-103.
[15]查永进,赵子仁.水平井钻井优化设计技术[J].新疆石油科技.1995,5(4):18-22.
[16]徐德行.水平井地质设计中着陆点和断点确定技术研究[J].内蒙古石油化工,2011,37(6):92-94.
[17]Lee B Y,Liu H S,Tarng Y S.Modeling and optimization of drilling process[J].Journal of Materials Processing Technology,1998,74:149-157.
[18]Karlsson H,Cobbley R,Jaques G E.New Developments in Short,Medium,and Long-Radius Lateral Drilling[C].Spe/iadc Drilling Conference,1989.
[19]Eren T,Ozbayoglu M E.Real Time Optimization of Drilling Parameters During Drilling Operations[C]//Spe Oil&Gas India Conference&Exhibition,2010.
[2]刘修善,曲同慈,孙忠国,等.三维漂移轨道的设计方法[J].石油学报,1995,16(4):118-124.
[3]韩志勇,黄根炉.考虑方位漂移的单目标定向井轨道设计方法[J].中国海上油气,2005,17(1):38-40.
[4]唐雪平,苏义脑,陈祖锡.三维井眼轨道设计模型及应用[J].数学的实践与认识,2004,34(3):62-72.
[5]韩志勇.定向井设计与计算[M].北京:石油工业出版社,1989.
[6]何树山,刘修善.三维水平井轨道设计[J].石油钻采工艺,2001,23(4):16-20.
[7]陈庭根,管志川.钻井工程理论与技术[M].北京:中国石油大学出版社,2000.
[8]刘修善.井眼轨道几何学[M].北京:石油工业出版社,2006.
[9]段玉廷.三维定向井轨迹设计中对方位漂移的考虑[J].天然气工业,1989,9(1):25-29.
[10]刘修善,孙忠国.三维漂移轨道的设计方法[J].石油学报,1995,16(4):118-124.
[11]谷红陶,袁航,夏海帮.彭水页岩气水平井中靶技术与应用[J].油气藏评价与开发,2015,5(6):76-80.
[12]马鑫.火山岩气藏水平井探气顶优化设计研究[J].长江大学学报(自然版),2014,11(10):77-78.
[13]胡丰金,庞保军.定向井扭方位三维轨迹设计简易解析法[J].石油钻采工艺,1996,18(3):32-36.
[14]陈安明,张辉,宋占伟.页岩气水平井钻完井关键技术分析[J].石油天然气学报,2012,34(11):98-103.
[15]查永进,赵子仁.水平井钻井优化设计技术[J].新疆石油科技.1995,5(4):18-22.
[16]徐德行.水平井地质设计中着陆点和断点确定技术研究[J].内蒙古石油化工,2011,37(6):92-94.
[17]Lee B Y,Liu H S,Tarng Y S.Modeling and optimization of drilling process[J].Journal of Materials Processing Technology,1998,74:149-157.
[18]Karlsson H,Cobbley R,Jaques G E.New Developments in Short,Medium,and Long-Radius Lateral Drilling[C].Spe/iadc Drilling Conference,1989.
[19]Eren T,Ozbayoglu M E.Real Time Optimization of Drilling Parameters During Drilling Operations[C]//Spe Oil&Gas India Conference&Exhibition,2010.