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时间:2019-05-15
《沁平12113H煤层气六分支水平井绒囊钻井液技术》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第36卷第3期石油钻采工艺V01.36No.32014年5月0ILDRILLING&PRODUCTIONTECHNOLOGYMav2014文章编号:1000—7393(2014)03—0039—03doi:10.13639/j.odpt.2014.03.009沁平12.11.3H煤层气六分支水平井绒囊钻井液技术王洪关崔金榜朱庆忠陈必武(1.中国石油大学,北京102249;2.中国石油华北油田分公司煤层气指挥部,山西长治046000)引用格式:王洪关,崔金榜,朱庆忠,等.沁平12.11-3H煤层气六分支水平井绒囊钻井液技术[J].石油钻采工艺,2014,36(
2、3):39.41.摘要:沁水盆地3≠}高阶煤层,煤层气钻井过程中掉块、垮塌、漏失、卡钻,成功率很低。沁平12—11-3H井三开是由2个主支、6个分支组成的多分支水平井,使用绒囊钻井液13d完成进尺4189.49m。根据不同井下情况、固控设备情况,加入成核剂、成膜剂、囊层剂和绒毛剂等4种绒囊钻井液主处理剂,调整钻井液性能:密度0.96~1.08gCcm,塑性黏度7-17mPa·S,动切力4.0-10.22Pa,煤层钻遇率达95%,完成地质要求且平均机械钻速12.65rn/h,较邻井提高11.55%。全井考验了绒囊钻井液高固相容纳能力、漏失地层封堵能力、井塌卡钻
3、处理能力、气侵维持性能能力。建议加强固控设备配套,进一步提高钻井液性能。关键词:煤层气;多分支水平井;绒囊钻井液中图分类号:TE254文献标识码:BFuzzy-balldrillingfluidtechnologyinCBMofmultilateralhorizontalwellQinping12--11—-3HwithsixbranchholesWANGH0ngguan,CUIJinbang,ZHUQingzh0ng,CHENBiwu(1.ChinaUniversityofPetroleum,Beo'ing102249,China;2.CoalbedMet
4、haneHea由uartersofHuabeiOilfieldCompany,CNPC,Changzhi046000,China)Abstract:TheNo.3coalbedinQinshuiBasinishighrankcoalseam,thedrillingofcoalbedmethaneencounteredrockfall,col—lapsing,lostcirculation,stickingandtherateofsuccessfuldrillingwasverylow.ThethirdspuddingofQinping12-11-3HWell
5、wasamulti.1ateralhorizontalwellconsistingoftwomainbranchesandsixbranches;thefuzzy-·balldrillingfluidwasappliedin13daysanddrilled4189.49m.Accordingtothedifferentdownholesituationsandsolid—controlequipment,fourkindsoffuzzy—balldrillingfluidadditives:core-formingagent,film—formingagen
6、t,layer-formingagentandfuzzy—formingagentwereaddedtoadjustthedrillingfluidproperties.Thedrillingfluiddensitywas0.96—1.08g/cm,plasticviscositywas7-17mPa‘S,dynamicshearforcewas4.0—10.22Pa,andcoalbedmethaneencounteringratewas95%.Thedrillingfluidmetthegeologicalrequirementsandtheaverag
7、eROPwas12.65m/h,whichhadimprovedby11.55%whencomparedwithadjacentwells.Thisdrillingtestedthecapacitiesofthefuzzy—balldrillingfluid,includingtheaccommodatingcapacityofhighpercentageofsolidphase,pluggingcapacityinleakingformations,processingcapabilityforwellcollapsingandpipesticking,a
8、ndthemaintainingperformanc
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