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时间:2019-05-15
《沁水盆地在用煤层气钻井液伤害沁水3煤岩室内评价》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35卷第4期石油钻采工艺Vo1.35No.42013年7月0ILDRILLING&PR0DUCTIONTECHNOLOGYJuly2013文章编号:1000—7393(2013)04—0047—04沁水盆地在用煤层气钻井液伤害沁水3煤岩室内评价崔金榜陈必武’颜生鹏袁光杰夏焱。王秀梅(1.中石油华北油田分公司煤层气勘探开发事业部,山西长治046000;2.青海油田井下作业公司,甘肃敦煌814000;3.中国石油集团钻井工程技术研究院,北京100195;4.中国石油集团海洋工程有限公司钻井事业部,天津300280)引用格式:崔金榜,陈必武,颜生鹏,等
2、.沁水盆地在用煤层气钻井液伤害沁水3撑煤岩室内评价[J].石油钻采工艺,2013。35(4):47—50.摘要:研究沁水3煤岩储层钻井液储层伤害机理,对沁水煤层气开发至关重要。室内对比测定了清水、绒囊、膨润土聚合物等3类钻井液伤害端氏煤矿3煤岩柱塞前后渗透率值。结果表明,清水、绒囊钻井液、膨润土聚合物钻井液伤害煤岩柱塞平均渗透率恢复值为70.88%、84.22%和49.26%。结合渗透率恢复实验数据、煤岩柱塞伤害时漏失情况,分析钻井液储层伤害的主要因素有钻井液滤液及颗粒伤害、煤岩自身煤粉及微粒运移、某些表面活性卉4与地层不配伍等。建议钻井使用无固相
3、控制煤粉运移的钻井液,适当使用处理剂封堵地层控制滤液与煤层接触机会,根据具体煤岩情况优选表面活性剂避免煤岩与表面活性剂不配伍造成储层渗透率降低。关键词:沁水盆地;煤层气;钻井液;储层伤害中图分类号:TE258文献标识码:ALabevaluationonformationdamageofNo.3coalbedmethanereservoirbydrillingfluidsinQinshuibasinCUIJinbang,CHENBiwu,YANShengpeng,YUANGuangjie,XIAYan,WANGXiumei(1.CBMBranchCo
4、mpany,HuabeiOilfieldCompany,Changzhi046000,China;2.DownholeoperationcompanyofQinghaiOilfield,Dnhuang814000,China;3CNPCDrillingResearchInstitute,Beijing100195,China;4.DrillingDivision,CNPCOfshoreEngineeringCo.,Ltd.,77anjin300280,China)Abstract:Itisvirtuallyimportantforhighandst
5、ableyieldofCBMtoresearchthedamagemechanismofNo.3CBMreservoirbydrilingfluidsinQinshuibasin.Usingclearwater,bentonite-polymerdrillingfluidandfuzzy-ballbaseddrillingfluidseparatelytocontaminate20coreplugswhichweregotfromthedrillingsiteofNo.3CBMinDuanshicoalmine,thepermeabilityofc
6、oreplugswasmeasuredandcompared.Itisconcludedthatthepermeabilityrecoveryrateofcoreplugsaftercontaminatingwiththethreesolutionswere70.88%,84.22%and49.26%separately.Throughlaboratorytestsandobservingleakofofcoreplugs,themainfactorsofdamagemechanismbydrillingfluidswerean~yzedtobes
7、olidphaseofdrillingfluid,migrafionofco~fineandincompatibilitybetweensomesurfactantindrillingfluidandtheformation.Thepapersuggeststhatweshouldtakenon-solidcoalfinemigrationcontrollabledrillingfluid,properlyusesometreatingagenttoplugformationtodecreasethecontactingchanceoffiltra
8、tionandformation,andoptimizesurfactanttoavoidtheformationperm
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