大庆油田煤层气钻井完井技术可行性研究

发布时间：2018-03-10 13:36

本文选题：煤层气　切入点：钻井　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：煤层气是大庆油田重要的接替资源之一,但富含煤层气的鹤岗盆地、鸡西盆地和呼和湖凹陷地层岩石研磨性强、可钻性差、机械钻速低、井漏严重、产量低、经济效益差等问题,因此需要对大庆油田煤层气钻井完井方案进行优化设计。本文完成了对国内外煤层气气体钻井技术、丛式井钻井技术、裸眼洞穴完井技术、超短半径水平井钻井系统、超短半径水平井施工工艺、超短半径水平井钻井技术优势、羽状煤层气羽状水平井特点、羽状煤层气分支水平井钻井技术难点、剖面优化设计、井身结构设计与轨迹控制技术、U型水平井技术、V型水平井技术以及国内外煤层气先进钻井装备等相关技术装备的调研,为大庆油田煤层气钻井完井施工奠定了理论基础。在分析大庆油田鹤岗盆地、鸡西盆地和呼和湖凹陷的地质特征基础上,对鹤岗盆地气体钻井的井身结构、钻井组合、钻井参数以及钻井装备进行了方案设计;对鸡西盆地的丛式井和U型水平井的井身结构、井眼轨迹剖面、钻具组合、钻井参数进行了优化设计;对海拉尔盆地呼和湖凹陷侧钻水平井和羽状分支水平井的井身结构、钻具组合和钻井参数进行了优化设计;同时对钻井施工中井下事故复杂预防方案进行了详细阐述。通过研究取得了以下几个成果:1.通过对大庆外围鹤岗盆地、鸡西盆地和海拉尔盆地的煤层气井的钻探情况分析说明:目前大庆探区煤层气钻井存在井漏严重,机械钻速低,钻井周期长等问题。2.提出了大庆探区煤层气直井、定丛井、水平井、侧钻井、羽状分支水平井的钻完井工艺初步技术方案。
[Abstract]:Coal bed methane (CBM) is one of the important replacement resources in Daqing Oilfield, but it is rich in CBM in Hegang Basin, Jixi Basin and Huhe Lake Sag, where rock grinding property is strong, drillability is poor, mechanical drilling rate is low, well leakage is serious, and output is low. Because of the poor economic benefits, it is necessary to optimize the drilling and completion scheme of coalbed methane in Daqing Oilfield. Ultra short radius horizontal well drilling system, ultra-short radius horizontal well drilling technology, ultra short radius horizontal well drilling technology superiority, plume coalbed gas plume horizontal well characteristics, pinnate coalbed methane branch horizontal well drilling technology difficulty, section optimization design, Well structure Design and trajectory Control Technology the investigation and investigation of U horizontal well technology, V horizontal well technology and advanced drilling equipment of coalbed methane at home and abroad, On the basis of analyzing the geological characteristics of Hegang basin, Jixi basin and Huhehu sag in Daqing oilfield, the well body structure and drilling combination of gas drilling in Hegang basin are studied. The drilling parameters and drilling equipment are designed, the well structure, borehole trajectory profile, drilling tool combination and drilling parameters of cluster wells and U type horizontal wells in Jixi Basin are optimized. The shaft structure, drilling tool combination and drilling parameters of lateral horizontal well and plume branch horizontal well in Huhe Lake depression of Hailaer Basin are optimized. At the same time, the complex prevention scheme of downhole accidents in drilling construction is elaborated in detail. The following results are obtained through the research. 1. Through the study of the Hegang basin on the periphery of Daqing, The drilling situation of coalbed methane wells in Jixi Basin and Hailaer Basin shows that there are serious well leakage, low drilling speed and long drilling cycle in the coalbed methane drilling in Daqing exploration area at present. Preliminary technical scheme for drilling and completion of horizontal wells, sidetracking wells and plume branched horizontal wells.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE257

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