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1、第32卷第4期石油钻采工艺Vol.32No.42010年7月OILDRILLING&PRODUCTIONTECHNOLOGYJuly2010文章编号：1000–7393（2010）04–0086–05煤层气羽状水平井井眼轨迹控制技术112133鲍清英张义何伟平张继东任源锋杨再葆（1.中国石油勘探开发研究院廊坊分院，河北廊坊065007；2.华北油田采油二厂，河北霸州065700；3.渤海钻探井下作业公司，河北任丘062552）摘要：为了提高煤层气的钻遇率、减少井下复杂事故，开展煤层气羽状水平井井眼轨迹控制技术研究至关重要。通过分析煤
2、层气产出机理和羽状水平井技术特点，给出了羽状井井眼轨迹控制综合分析流程图及常用的控制方法，详细介绍了随钻电阻率、自然伽马测井等测井响应井眼轨迹综合控制技术及不同地层倾角煤储层井眼轨迹实施跟踪预测控制技术。研究结果表明：准确掌握煤储层物性参数、地层倾角及顶底板岩性等是实现井眼轨迹有效控制的基础和关键，在钻进过程中通过实时跟踪和分析钻井参数，并结合随钻电阻率、自然伽马测井及综合录井信息等对井眼轨迹进行实时监测和调整，可有效控制钻头在目标层中最佳层位延伸钻进，从而可确保煤储层钻遇率及减少井下复杂事故发生。关键词：产出机理；羽状水平井；井眼
3、轨迹控制；响应特征；地层倾角中图分类号：TE242.9文献标识号：AStudyonwellpathcontroltechnologiesforpinnatehorizontalCBMwells112133BAOQingying,ZHANGYi,HEWeiping,ZHANGJidong,RENYuanfeng,YANGZaibao（1.LangfangBranch,ResearchInstituteofPetroleumExplorationandDevelopment,Petrochina,Langfang065007,China
4、;2.No.2OilProductionFactory,PetroChinaHuabeiOilfield,Bazhou065700,China;3.DownholeServicesCo,CNPCBohaiDrillingEngineeringCompanyLimited,Renqiu062552,China）Abstract:Pinnatehorizontalwelltechnologyisoneofthemaintechnologiesforcoalbedmethane(CBM)development.Itisveryimporta
5、nttostudyonthewellpathcontroltechnologyforincreasingmuchmorefootageincoalseamsanddecreasingboreholeprob-lems.BasedontheanalysisofCBMgenerationmechanismsandcharacteristicsofpinnatehorizontalwell,theflowchartofanalysisonwellpathcontrollingforpinnatehorizontalwellandgener
6、alcontrollingmethodsarepresented.Besides,somewellpathcontroltechnologiessuchaslogresponsecontrollingtechnologyofresistivity-while-drillingandgammaraylogging,etc.,andwellpathrealtimetrackingandpredictingindifferentdipanglesofcoalseamsarealsointroducedindetails.Itcomesto
7、conclusionsthatoneofthemostimportantthingsforcontrollingwellpathistomastertheaccurateparametersforcoalseamsandstratadips,andtofindoutthelithologiccharactersoftheadjacentrocks.Itcouldimplementtherealtimecontrollingandadjustingonthewellpathwiththerealtimeanalysesofdrilli
8、ngparameters,resistivity,gammaraylogging,andsoon,anditfinallycouldensurethebitdrillingaheadalongtheoptimumpositionoft
