頁巖油藏強封堵油基鉆井液技術研究

1、中國石油大學（華東）碩士學位論文頁巖油藏強封堵油基鉆井液技術研究姓名：姜興偉申請學位級別：碩士專業(yè)：石油與天然氣工程指導教師：邱正松；李公讓201205StudyonOil—baseDrillingFluidwithStrongSealingAbilityinShaleReservoirsJiangXingwei(Oil&GasEngineering)DirectedbyProfQiuZhengsong，SeniorEngineerLi

2、GongrangAbstractInthispaperourconcernistheproblemofboreholeinstabilityintheshalereservoirTheeffectsandmechanismsofmaincomponentsinoilbasedrillingfluidwerealsodiscussedThisstudyshowsthatfilterlossandemulsionstabilitydecli

3、nedastheoilandwaterratiodeclined；oilbaseddrillingfluid’Sviscosityandsheafingforceincreasealotasthedoseofmain／auxiliaryemulsifierincreased；filterlossdeclinedanddemulsificationvoltagerised，asthedoseoffluidlossadditiveandbl

4、ockingagentincreased；weuseCaotomaintainoilbaseddrillingfluid’SalkalinePHvalue，acidgasinlayersOnthepollutionofdrillingfluidcouldbeprevented；organicclaycallimprovetheviscosityandsuspendbarite；shearforceagentCanimproveoilba

5、seddrillingfluid’SsuspensionandcarryingcapacityVariousadditiveshasbeenoptimizedthroughperpendiculararraytestUltimatelythestrongblockingoilbaseddrillingfluidsystemwasdeterminedthroughexperiments[(O#dieseloilCaCl2solution)

6、(oil／waterratio80：20)]3％primaryemulsion15％assistemulsion2％wettingagent4％organicclay15％basicityconditioningagent3％fluidlossagent5％compositeblockingagentThroughtheuseofcompositeblockingagents，Thesystem’Ssealingabilityincra

7、cksandmicro—fracturedWasimprovedTheapplicationofBoyeping1wellshowsthatstrongblockingoilbaseddrillingfluidsystemhasobviousadvantagesinstabilizingtheboreholewall，leakplugging，protectingoilandgaslayersolvingthecomplexproble