涪陵页岩气田防漏堵漏技术应用研究.pdf

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1、第42卷第3期探矿工程(岩土钻掘工程)Vo1．42No．32015年3月ExplorationEngineering(Rock＆SoilDrillingandTunneling)Mar．2015：11—14涪陵页岩气田防漏堵漏技术应用研究陈星星，(1．长江大学研究生院，湖北荆州434100；2．中石化重庆涪陵页岩气勘探开发有限公司，重庆涪陵408014)摘要：涪陵页岩气田开发过程中最大的问题就是井漏，据统计，有67．2％的井在钻井过程中都发生了不同程度的漏失，影响了钻井工程质量、进度及效益，特别是三开长

2、水平段漏失油基钻井液，造成了严重的经济损失。为了降低钻井工程风险、提高钻井速度、降低钻井成本，从现场实际情况出发，对钻井漏失情况进行了统计分析，认为中浅层漏失以溶洞型漏失、缝洞型漏失为主，龙马溪、五峰组漏失以裂缝型漏失为主。重点介绍了针对涪陵页岩气田各开次特点采取的防漏堵漏技术及现场应用情况。同时随着开发区域扩大，地质情况有所改变，井漏问题更加复杂，提出了下一步防漏堵漏技术发展方向及建议。关键词：涪陵页岩气田；井漏；防漏堵漏；油基钻井液中图分类号：P634．6；TE254文献标识码：A文章编号：1672

3、—7428(2015)03—0011—04ApplicationResearchonLostCirculationPreventionandPlugginginFulingShaleGasField／CHENXing-xing’(1．SchoolofGraduate，YangtzeUniversity，JingzhouHubei434100，China；2．SinopecChongqingFulingShaleGasExplorationandDevelopmentCo．，Ltd．，Chongqing4

4、08014，China)Abstract：LostcirculationcontrolisthebiggestprobleminthedevelopmentprocessofFulingshalegasfield．Accordingtostatistics，differentdegreesoflostcirculationoccurredin67。2％wellsduringdrilling，whichhasbadaffectontheengi—neeringquality，theconstruction

5、progressandtheeconomicbenefit；especiallythelostcirculationofoil—baseddrillingfluidinthethreeopeningandlonghorizontalsection，whichcausedseriouseconomiclosses．Inordertoreducetheriskofdrill—ingengineering，improvedrillingefficiencyandreducedrillingcost，start

6、ingfromtheactualsituationonsite，thestatisticalanalysiswasmadeondrillingleakage，itwasthoughtthatinmiddle-shallowlayerweremainlykarstcaveleakageandfrac—ture—cavitytypeleakage；inLongmaxiformationandWufengformationwasmainlyfracturetypeleakage．Thepaperintro—d

7、ueesthelostcirculationpreventionandpluggingtechnologiesadoptedinFulingshalegasfieldaccordingtothecharacteris·ticsofeachopeningandthefieldapplication．Alongwiththedevelopmentregionextension，thegeologicalconditionsbe—comechangingandtheleakageismorecomplicat

8、ed，thenextdevelopmentdirectionoflostcirculationpreventionandplug—gingtechnologiesareputforwardwithsomesuggestions．Keywords：Fulingshalegasfield；lostcirculation；lostcirculationpreventionandplugging；oil—baseddrillingfluid涪陵页岩