彭水区块页岩气水平井钻井关键技术.docx

第41卷第5期2013年9月Vol.41No.5Sep.,2013石油钻探

第41卷第5期

2013年9月

Vol.41No.5

Sep.,2013

PETROLEUMDRILLINGTECHNIQUES

?页岩气钻井完井专题?doi:10.3969/j.issn.1001-0890.2013.05.002彭水区块页岩气水平井钻井关键技术

张锦宏

(中国石化华东石油局，江苏南京210019)

摘要：页岩气作为一种新兴的油气资源已越来越受到重视，国外页岩气勘探开发经验表明，水平井是页岩气藏成功开发的关键之一，但国内勘探开发工作及关键技术研究还处于起步阶段，存在钻速低、周期长、成本高及钻井中易发生井漏等问题。结合彭水区块4口页岩气水平井的钻井实践，从地层压力、地层岩性、岩石可钻性、页岩坍塌机理及页岩气固井特殊要求等方面入手，详细分析了气体钻井、旋转导向钻井、井眼轨迹控制、防漏堵漏、钻井液优选、水泥浆体系优选、井身结构优化、钻头优选、井眼净化等关键技术及现场应用效果，并围绕页岩气钻井提速、降低成本提出了一些建议。

关键词：页岩气水平井钻井固井彭水区块

中图分类号：TE242;TE256文献标识码：A文章编号：1001-0890(2013)05-0009-07

KeyDrillingCompletionTechniquesforShaleGas

HorizontalWellsinPengshuiBlock

ZhangJinhong

(EastChinaPetroleumBureau,Sinopec,Nanjing,Jiangsu,210019,China)

Abstract:Shalegas,anewkindofemergingresource,hasdrawnmoreandmoreattentionrecently.Thesuccessfulexperiencesofexplorationanddevelopmentforshalegasinsomeforeigncountriesshowthatthehorizontalwellisthekeyforsuccessfulshalegasdevelopment.However,shalegasexplorationanddevelopmentandrelatedkeytechniqueresearchinChinaarestillattheprimarystage.Engineeringdifficul-tiesinshalegaswelldrillingfacelowpenetrationrate,longdrillingcycle,highcostandpossiblecirculationloss.Basedonthedrilingpracticeof4shalegaswellsinPengshuiBlock,anin-depthresearchonformationpressure,lithology,drillability,shalecavingmechanismandspecialrequirementsforcementingwasmadeandthenkeytechniquesincludingairdrilling,rotarysteeringdrilling,welltrajectorycontrol,leakagepre-ventionandsealing,drillingfluidselection,cementslurryoptimization,wellstructureoptimization,drillingbitselection,wellborecleaning,aswellastheireffectivenesswereanalyzed.Finallysomerecommendationsonhowtoincreasepenetrationrateandtolowercostwereputforward.Thisarticlemightbe