磨溪气田雷一~1中亚段薄储层水平井地质导向着陆技术
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摘要
四川盆地川中地区磨溪气田中三叠统雷一段为泥质白云岩、膏质白云岩、石膏频繁互层,地质录井分层困难,雷一1中亚段有效储层为针孔白云岩,厚度较薄(仅2～6m),井眼轨迹在薄储层顶部准确着陆的风险巨大。为此,开展了随钻测井与电缆测井的伽马和深、浅相位电阻率信息相关性分析,建立了能够准确地反映所钻岩性的曲线形态。利用地质构造图、地震剖面、随钻测井信息、岩屑录井等资料,建立钻前井眼轨迹着陆姿态地质模型;实钻中考虑到随钻测井工具的仪器测量点距离钻头有10～13m距离,将岩屑录井与随钻测井信息进行综合应用,准确地跟踪正钻的标志岩性,及时修正储层垂深,精细调整井眼轨迹,有效地保证了水平井井眼轨迹在储层顶部准确着陆,形成了磨溪气田雷一1中亚段薄储层的地质导向着陆技术。该项技术的现场应用降低了钻穿储层而必须填井侧钻、水平段一开始钻进就进行大幅度的轨迹调整等钻井风险,为该气田水平井高效开发做出了贡献。
The first member of the Leikoupo Fm reservoirs in the Middle Sichuan Basin is dominated by argillaceous dolomites,anhydritic dolomites,and gypsums as the frequent interbedding layers,which makes it difficult to identify different layers by mud logging.The pinhole dolomites with the thickness of only 2–6mare the effective reservoirs in the middle submember of the first member of the Leikoupo Fm(Lei11),which brings about a high risk in guiding the well trajectory to land on the reservoir top.In view of this,the correlation analysis between the logging while drilling(LWD)and wireline logging(WL)was made of the gamma ray and deep-and shallow-phase resistivity.On this basis,the LWD curves were established reflecting the rock's lithology while drilling.Then,by use of the geological structure,seismic profile,LWD data,and the cutting logging information,etc.,ageological model was built for the landing of well trajectory.Before this technology was used,such drilling risks were easily encountered,for example,another sidetrack horizontal well would have to be drilled if the pay zone was carelessly drilled through by the previous horizontal well;or the horizontal section would start with high dogleg severity if the landing angle was inappropriate.With this technology,the previous drilling risks are mitigated to a high level.In conclusion,this technology contributes a lot to the high-efficiency and cost-effective development of this field.
The first member of the Leikoupo Fm reservoirs in the Middle Sichuan Basin is dominated by argillaceous dolomites,anhydritic dolomites,and gypsums as the frequent interbedding layers,which makes it difficult to identify different layers by mud logging.The pinhole dolomites with the thickness of only 2–6mare the effective reservoirs in the middle submember of the first member of the Leikoupo Fm(Lei11),which brings about a high risk in guiding the well trajectory to land on the reservoir top.In view of this,the correlation analysis between the logging while drilling(LWD)and wireline logging(WL)was made of the gamma ray and deep-and shallow-phase resistivity.On this basis,the LWD curves were established reflecting the rock's lithology while drilling.Then,by use of the geological structure,seismic profile,LWD data,and the cutting logging information,etc.,ageological model was built for the landing of well trajectory.Before this technology was used,such drilling risks were easily encountered,for example,another sidetrack horizontal well would have to be drilled if the pay zone was carelessly drilled through by the previous horizontal well;or the horizontal section would start with high dogleg severity if the landing angle was inappropriate.With this technology,the previous drilling risks are mitigated to a high level.In conclusion,this technology contributes a lot to the high-efficiency and cost-effective development of this field.
引文
[1]中国石油西南油气田公司川中油气矿.磨030-H24井工程、地质设计[R].遂宁:中国石油西南油气田公司川中油气矿,2011.Middle Sichuan Division of PetroChina Southwest Oil&Gasfield Company.Mo 030-H24 well's engineering design and geological design[R].Suining,Sichuan:Middle Sichuan Division of PetroChina Southwest Oil&Gasfield Company,2011.
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[10]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.XU Dexing.Study on landing point and breaking point determination technology in horizontal well geological design[J].Inner Mongolia Petrochemical Industry,2011,37(6):92-94.
[11]罗万静,王晓冬,李义娟,等.水平井着陆控制模型探讨[J].断块油气藏,2006,13(6):55-57.LUO Wanjing,WANG Xiaodong,LI Yijuan,et al.Model of horizontal well geosteering and its application[J].Fault-Block Oil&Gas Field,2006,13(6):55-57.
[12]罗荣,李双林,霍光.水平井井眼轨迹分析及其应用探讨[J].中外能源,2012,17(7):53-56.LUO Rong,LI Shuanglin,HUO Guang.The discussion on analysis of the horizontal well trajectory and its application[J].Sino-Global Energy,2012,17(7):53-56.
[13]黄根炉,赵金海,赵金洲,等.基于地质导向的水平井中靶优化设计[J].石油钻采工艺,2004,26(6):1-3.HUANG Genlu,ZHAO Jinhai,ZHAO Jinzhou,et al.Optimizing design of hitting target for geo-steering horizontal drilling[J].Oil Drilling&Production Technology,2004,26(6):1-3.
[14]中国石油川庆钻探工程有限公司钻采工程技术研究院.磨030-H24井定向井技术总结报告[R].广汉:中国石油川庆钻探工程公司钻采工程技术研究院,2011.Drilling and Production Technology Research Institute,Chuanqing Drilling Engineering Company,CNPC.Mo 030-H24directional well technology summary report[R].Guanghan,Sichuan:Drilling and Production Technology Research Institute,Chuanqing Drilling Engineering Company,CNPC,2011.
[2]赵彬凌,李黔,高林,等.水平井综合录井地质导向系统及应用[J].钻采工艺,2008,31(6):45-46.ZHAO Binling,LI Qian,GAO Lin,et al.Geosteering system and its application in compound logging of horizontal wells[J].Drilling&Production Technology,2008,31(6):45-46.
[3]许海清.FEWD在东辛油田水平井钻井中的地质导向作用[J].录井工程,2006,17(1):15-17.XU Haiqing.FEWD geologic steering functions in Dongxin oilfield horizontal well drilling[J].Mud Logging Engineering,2006,17(1):15-17.
[4]SULLIVAN M J,SCHEEVELl J R,KATZ B.Enhanced use of LWD data for improved geosteering and geologic interpretation[C]∥SPWLA Annual Logging Symposium,2002.Houston,Texas:Society of Petrophysicists and WellLog Analysts,2002.
[5]哈里伯顿公司.哈里伯顿MWD/LWD无线随钻测量和测井系统简介[R].休斯敦:哈里伯顿公司,2009.HALLIBURTON company.Halliburton MWD&LWD system brief introduction[R].Houston,Texas:HALLIBURTON Company,2009.
[6]关臣英,王晓阳.如何利用构造图进行定向井和水平井的地质导向[J].科技情报开发与经济,2009,19(3):74-75.GUAN Chenying,WANG Xiaoyang.How to use the structural map to make the geosteering for the directional well and horizontal well[J].Sci-Tech Information Development&Economy,2009,19(3):74-75.
[7]梁齐端,赵世龙,丁忙生.自然伽马测井曲线的分形特征分析[J].物探与化探,2006,30(3):240-243.LIANG Qiduan,ZHAO Shilong,DING Mangsheng.An analysis of fractal characteristics of natural gamma ray logging curves[J].Geophysical and Geochemical Exploration,2006,30(3):240-243.
[8]刘之的,夏宏泉.随钻电阻率测井曲线与电缆电阻率测井曲线的对比分析[J].国外测井技术,2007,22(3):46-48.LIU Zhidi,XIA Hongquan.Comparative analysis of logging-while-drilling resistivity logs and wire line resistivitylogs[J].World Well Logging Technology,2007,22(3):46-48.
[9]冯亮.水平井随钻测井与常规测井响应特征对比分析[J].内蒙古石油化工,2007,33(9):140-143.FENG Liang.The Comparison of characteristic of responses between cable logging and logging while drilling in horizontal well[J].Inner Mongolia Petrochemical Industry,2007,33(9):140-143.
[10]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.XU Dexing.Study on landing point and breaking point determination technology in horizontal well geological design[J].Inner Mongolia Petrochemical Industry,2011,37(6):92-94.
[11]罗万静,王晓冬,李义娟,等.水平井着陆控制模型探讨[J].断块油气藏,2006,13(6):55-57.LUO Wanjing,WANG Xiaodong,LI Yijuan,et al.Model of horizontal well geosteering and its application[J].Fault-Block Oil&Gas Field,2006,13(6):55-57.
[12]罗荣,李双林,霍光.水平井井眼轨迹分析及其应用探讨[J].中外能源,2012,17(7):53-56.LUO Rong,LI Shuanglin,HUO Guang.The discussion on analysis of the horizontal well trajectory and its application[J].Sino-Global Energy,2012,17(7):53-56.
[13]黄根炉,赵金海,赵金洲,等.基于地质导向的水平井中靶优化设计[J].石油钻采工艺,2004,26(6):1-3.HUANG Genlu,ZHAO Jinhai,ZHAO Jinzhou,et al.Optimizing design of hitting target for geo-steering horizontal drilling[J].Oil Drilling&Production Technology,2004,26(6):1-3.
[14]中国石油川庆钻探工程有限公司钻采工程技术研究院.磨030-H24井定向井技术总结报告[R].广汉:中国石油川庆钻探工程公司钻采工程技术研究院,2011.Drilling and Production Technology Research Institute,Chuanqing Drilling Engineering Company,CNPC.Mo 030-H24directional well technology summary report[R].Guanghan,Sichuan:Drilling and Production Technology Research Institute,Chuanqing Drilling Engineering Company,CNPC,2011.
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