顺北含辉绿岩超深井井身结构优化设计
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摘要
顺北井区采用六级井身结构开发,存在大尺寸井眼长、套管层次多以及火成岩漏失,导致钻井效率低、亟需优化井身结构。采用Drillworks软件模拟了地层三压力剖面,成像测井与电镜扫描认识了火成岩裂缝分布,通过岩石矿物成分与理化性能分析了深部泥岩坍塌机理,通过对比非标套管与钻杆的强度与尺寸分析了管柱匹配性。结果表明全井存在4个不同压力系统,火成岩裂缝纵向分布缝宽0.5~2 mm、微裂缝缝宽2~3μm,易塌泥岩伊蒙混层达70%,蒸馏水作用下线性膨胀率40%~45%,得到了3个必封点与1个风险点;通过配套钾铵基聚磺钻井液体系与漏失补救措施,保障了长裸眼井壁稳定;优选了?139.7mm非标套管,完钻井眼尺寸由114.3 mm扩大至120.65 mm满足使用非标88.9 mm钻杆,将井身结构优化为四级。新结构满足高效钻井需求,缩短钻井周期达125 d。
The six-section casing program is adopted in the Shunbei block, but it is disadvantageous with long large-size borehole, excessive casing sections and mud loss in igneous rocks, which lead to low-efficient drilling. Therefore, it is necessary to optimize the casing program. In this paper, three reservoir pressures were simulated by using the Drillworks Software. The distribution of fractures in igneous rocks was identified by using the image logging and SEM(scanning electron microscope). The collapse mechanisms of deep shale were investigated on the basis of its mineral composition and physical and chemical properties. The matching between nonstandard casings and drilling pipes was analyzed in terms of their strength and size. It is shown that there are four pressure systems in hole. The fractures distributed vertically in igneous rocks are 0.5~2 mm wide and the microfractures are 2~3 μm wide. The illite/smectite formation accounts for 70% of caving mudstones and its linear expansion ratio in distilled water is 40%~45%. Three plugging points and one risk point were defined. The long open-hole section was stabilized by taking mud loss remedial measures with potassium ammonium polysufide drilling fluid system. The ?139.7 mm non-standard casing was selected and the completion hole diameter was enlarged to 120.65 mm from 114.3 mm, so that the ?88.9 mm non-standard drilling pipe could be used and the casing program was optimized into four-section mode. By virtue of the new casing program, the drilling was performed efficiently, with the drilling cycle shortened by 125 d.
The six-section casing program is adopted in the Shunbei block, but it is disadvantageous with long large-size borehole, excessive casing sections and mud loss in igneous rocks, which lead to low-efficient drilling. Therefore, it is necessary to optimize the casing program. In this paper, three reservoir pressures were simulated by using the Drillworks Software. The distribution of fractures in igneous rocks was identified by using the image logging and SEM(scanning electron microscope). The collapse mechanisms of deep shale were investigated on the basis of its mineral composition and physical and chemical properties. The matching between nonstandard casings and drilling pipes was analyzed in terms of their strength and size. It is shown that there are four pressure systems in hole. The fractures distributed vertically in igneous rocks are 0.5~2 mm wide and the microfractures are 2~3 μm wide. The illite/smectite formation accounts for 70% of caving mudstones and its linear expansion ratio in distilled water is 40%~45%. Three plugging points and one risk point were defined. The long open-hole section was stabilized by taking mud loss remedial measures with potassium ammonium polysufide drilling fluid system. The ?139.7 mm non-standard casing was selected and the completion hole diameter was enlarged to 120.65 mm from 114.3 mm, so that the ?88.9 mm non-standard drilling pipe could be used and the casing program was optimized into four-section mode. By virtue of the new casing program, the drilling was performed efficiently, with the drilling cycle shortened by 125 d.
引文
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[9]邱春阳,赵立新,司贤群,何兴华,王宝田,渠震龙.强抑制、抗高温防塌钻井液在董8井中的应用[J].石油钻采工艺,2015,37(4):45-49.QIU Chunyang,ZHAO Lixin,SI Xianqun,HE Xinghua,WANG Baotian,QU Zhenlong.The use of drilling fluid te of strong inhibition,anti-high temperature and anticollapse in Well Dong-8[J].Oil Drilling&Production Technology,2015,37(4):45-49.
[10]张国,徐江,詹美玲,刘贵传,钟汉毅,马鹏.新型聚胺水基钻井液研究及应用[J].钻井液与完井液,2013,30(3):23-26.ZHANG Guo,XU Jiang,ZHAN Meiling,LIU Guichuan,ZHONG Hanyi,MA Peng.Research and application of polyamine water-based drilling fluid system[J].Drilling Fluid&Completion Fluid,2013,3(03):23-26.
[11]肖金裕,杨兰平,周华安,孙俊.新疆塔北地区优快钻井钻井液技术[J]钻井液与完井液,2014,3(12):39-42.XIAO Jinyu,YANG Lanping,ZHOU Hua’an,SUN Jun.Optimized and fast drilling fluid technology for Tabei,Xinjiang[J].Drilling Fluid&Completion Fluid,2014,31(2):39-42.
[12]于洋,刘晓民,黄河淳,朱峰.欠平衡钻井技术在碳酸盐岩超深水平井TP127H井中的应用[J].石油钻采工艺,2014,36(1):29-32.YU Yang,LIU Xiaomin,HUANG Hechun,ZHU Feng.Application of underbalanced drilling technology in ultra-deep horizontal well(TP127H well)of carbonate reservoirs[J].Oil Drilling&Production Technology,2014,36(1):29-32.
[13]王悦坚.塔河油田恶性漏失堵漏与大幅度提高地层承压技术[J].钻井液与完井液,2013,30(4):33-36.WANG Yuejian.Technology on mud lost control of severe lost circulation and improving formation pressure containment in Tahe Oilfield[J].Drilling Fluid&Completion Fluid,2013,3(04):33-36.
[2]黄进军,罗平亚,李家学,王书琪,张桂英,张宾.提高地层承压能力技术[J].钻井液与完井液,2009,26(2):69-73.HUANG Jinjun,LUO Pingya,LI Jiaxue,WANG Shuqi,ZHANG Guiying,ZHANG Bin.How to prove the press in the field[J].Drilling Fluid&Completion Fluid,2009,26(2):69-73.
[3]刘彪,白彬珍,潘丽娟,牛丽霞,樊艳芳.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,NIU Lixia,FANYanfang.Casing program of deep well with evaporite bed in Tuofutai Block[J].Petroleum Drilling Techniques,2014,42(2):48-52.
[4]金衍.井壁稳定力学研究[D].北京:石油大学(北京),1998.JIN Yan.Research on mechanics of borehole stability[D].Beijing:Petroleum University,School Natural Gas,1998.
[5]陈曾伟,刘四海,林永学,刘修善,李大奇.塔河油田顺西2井二叠系火成岩裂缝性地层堵漏技术[J].钻井液与完井液,2014,31(1):40-43.CHEN Zengwei,LIU Sihai,LIN Yongxue,LIU Xiushan,LI Daqi.Lost circulation control for fractured permian igneous rock zone in Well Shunxi2 of Tahe Oilfield[J].Drilling Fluid&Completion Fluid,2014,3(11):40-43.
[6]王贵,曹成,蒲晓林,牛晓,方静,邓富元.塔河油田桑塔木组钻井液优化与室内评价[J].钻采工艺,2015,38(5):73-77.WANG Gui,CAO Cheng,PU Xiaolin,NIU Xiao,FANGJing,DENG Fuyuan.Drilling fluid optimization and evaluation of indoor about the sangtamu group of Tahe oilfield[J].Drilling and Production Technology,2015,38(5):73-77.
[7]孙宁.钻井手册(上)[M].北京:石油工业出版社,2013:456-462.SUN Ning.Drilling handbook:(Part A)[M].Beijing:Petroleum Industry Press,2013:456-462.
[8]陈富全,夏荣徽,聂强勇,何涛,曾健.专项封堵防塌技术在塔中油田的应用[J]钻井液与完井液,2015,32(2):58-60.CHEN Fuquan,XIA Ronghui,NIE Qiangyong,HE Tao,ZENG Jian.Application of special plugging and collapse prevention technology in Tazhong Oilfield[J].Drilling Fluid&Completion Fluid,2015,3(22):58-60.
[9]邱春阳,赵立新,司贤群,何兴华,王宝田,渠震龙.强抑制、抗高温防塌钻井液在董8井中的应用[J].石油钻采工艺,2015,37(4):45-49.QIU Chunyang,ZHAO Lixin,SI Xianqun,HE Xinghua,WANG Baotian,QU Zhenlong.The use of drilling fluid te of strong inhibition,anti-high temperature and anticollapse in Well Dong-8[J].Oil Drilling&Production Technology,2015,37(4):45-49.
[10]张国,徐江,詹美玲,刘贵传,钟汉毅,马鹏.新型聚胺水基钻井液研究及应用[J].钻井液与完井液,2013,30(3):23-26.ZHANG Guo,XU Jiang,ZHAN Meiling,LIU Guichuan,ZHONG Hanyi,MA Peng.Research and application of polyamine water-based drilling fluid system[J].Drilling Fluid&Completion Fluid,2013,3(03):23-26.
[11]肖金裕,杨兰平,周华安,孙俊.新疆塔北地区优快钻井钻井液技术[J]钻井液与完井液,2014,3(12):39-42.XIAO Jinyu,YANG Lanping,ZHOU Hua’an,SUN Jun.Optimized and fast drilling fluid technology for Tabei,Xinjiang[J].Drilling Fluid&Completion Fluid,2014,31(2):39-42.
[12]于洋,刘晓民,黄河淳,朱峰.欠平衡钻井技术在碳酸盐岩超深水平井TP127H井中的应用[J].石油钻采工艺,2014,36(1):29-32.YU Yang,LIU Xiaomin,HUANG Hechun,ZHU Feng.Application of underbalanced drilling technology in ultra-deep horizontal well(TP127H well)of carbonate reservoirs[J].Oil Drilling&Production Technology,2014,36(1):29-32.
[13]王悦坚.塔河油田恶性漏失堵漏与大幅度提高地层承压技术[J].钻井液与完井液,2013,30(4):33-36.WANG Yuejian.Technology on mud lost control of severe lost circulation and improving formation pressure containment in Tahe Oilfield[J].Drilling Fluid&Completion Fluid,2013,3(04):33-36.