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时间:2019-05-22
《煤层气U型井钻井采气技术研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第32卷第4期石油钻采工艺Vo1.32No.42010年7月OILDRILLING&PR0DUCT10NTECHNOLOGYJuly2010文章编号:1000~7393f2010)04—009105煤层气U型井钻井采气技术研究鲜保安'夏柏如张义鲍清英王海军刘建伟(1.中国地质大学,北京100083;2.中国石油勘探开发研究院廊坊分院,河北廊坊065007:3华北油田公司采油工艺研究院,河北任丘062552)摘要:国内高陡构造煤层气资源丰富、分布较广,开发潜力巨大。针对高陡构造煤储层特点,提出了一种
2、适合开发高陡构造煤层气的U型井钻完井技术,并结合霍林河盆地低煤阶煤层气地质特征,给出了配套的U型井钻完井技术、欠平衡钻井工艺及地面采气技术。结果表明:u型井钻采技术充分利用了直井和定向井的技术优势,可结合煤储层地质特性,利用流体势能原理实现煤层的排水降压采气;采用充气欠平衡钻井技术,通过合理优化注气排量、注气压力和钻井液排量等,可有效保护煤储层,减少储层污染;采用组合u型井钻采技术,可实现多口U型井共用一口直井进行排采,从而节约地面资源,发挥一井多用的作用。关键词:煤层气;U型井;欠平衡钻井;钻采
3、技术中图分类号:TE242.9文献标识号:AStudyondrillingandextractiontechnologiesforU—shapeCBMwellsXIANBa0an,XIABairu,ZHANGYi,BAOQingying,WANGHaijun,LIUJianwei(1ChinaUniversityofGeosciences,Beijing100083,China;2ResearchInstituteofPetroleumExplorationandDevelopment-Langf
4、ang,PetroChina,Langfang065007,China;3.ResearchInstituteofOilProductionTechnology,HuabeiOilfieldCompany,Renqiu062550,China)Abstract:Thehighsteepstructurecoal—bedmethane(CBM)resourcesareabundantandwidelydistributedinhighsteepstruc—turesinChina,SOthereis
5、greatpotentialfordevelopment.Accordingtothecharacteristicsofcoalseamsinhighsteepstrucmres,anewtechnology,namelyU—shapewelldrillingandcompletiontechnology,isproposed,anditissuitablefordevelopingtheCBMinhighsteepstructure.Basedonthegeologicfeaturesoflow
6、—rankCBMinHuolinheBasin,theU·shapewelldrillingandcompletiontech—nology,theunder-balanceddrillingtechnology,andthesurfaceacquisitiontechnology,etc.,arealsointroducedindetails.ItcomestoconclusionthattheU—shapedrillingandextractiontechnologyhastheadvanta
7、gesofbothverticalwellsanddirectionalwells,itcouldimplementthedewateringandgasproducingwiththegeologicfeaturesandtheenergyofposition,anditcouldalsopreventthecoalseamsfrompollutionwiththeunder—balanceddrillingtechnology.ByusingthecombinedU—shapedrilling
8、technology,gascouldbeproducedfromthecommonverticalwellforseveralU—shapewells,itcouldsavealotofsurfacefacilities.Keywords:CBM;U—shapewell;under-balanceddrilling;drillingandextractiontechnology国内煤层气储层地质构造相对复杂,与之相适单斜或向斜、背斜相对陡峭的翼部煤层,其煤层倾角应的钻完井技术与油
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