河套盆地光明构造超深井钻井提速关键技术

打开文本图片集

中图分类号：TE323 文献标志码：A 文章编号：1000-7393（2025）-04-0407-10

Abstract：Theultra-deepwels in the Guangming Structureof the Hetao Basincommonlyface technical chalenges including complex pressuresystes，nrrowsfeuddensitywindows，poorwellsabilitylowockdrilbilityinlocalizdforatios，nd highwellcontrolss.seissesoftnleadtoomplexdowoleevetssuchasicks，ossscolsesndsuckpiuling inlowdrillngeiciencyandprolongedcycletimes.Onthisbasis，Abnormal-pressuremechaismswereclarified，ndte presure （pore-fracture-colapse）profile was built with amultifactorgeomechanical modelThis guidedtheoptimizationofcasing programs，eliminatigthehistoricupperlost-circulation，lowerinfuxprobleminthesmeopen-holesection.Usingrock-mechanicalproperty profiles，customized PDCbitsandhigh-torquescrewacelerationtoolswereselected，anddrilling parameters were optimizedtoraiseROP.Basedontheunderstandingofformationdipangleandtheanti-inclinationeffectoflarge-sizedwel pendulumdrillngtoolcombinatin，theantiinclinationandfastdrillngtechnologyofverticaldrillingtoolmatchingscrewis recommended.Basedonstabilityanalysisofhigh-pressrewater-bearing formationsandcontamination tests，theinnovative managed-pressure water-out safedrlling technique was introduced，sharplyreducingboth ud lossesandlossevents.Considering salt/gypsumdistributionsandcreeplaws，anoil-basedmudsystem waschosen，supportedbymanaged-pressredrlingand salt/gypsum-safetechniques，efectivelycontrolingstickingandtightspotriss.Tecombinedtechnologywasfield-testednthee wells.Average drillingcycle dropped from322 daysto195days，a 39.44% reduction，markedly accelerating efficient exploration and development.The effort also provides valuable experience for future ultra-deepdriling acceleration across the Hetao Basin.

Keywords：ultra-deepwell;drilingspeedoptimzation;wellstructure；salt-gypsum formation;high-pressurewaterZone；wel stability; safe drilling practices; Guangming Structure

0 引言

光明构造位于河套盆地兴隆构造带洼槽区，靠近盐湖沉积中心，储层以膏岩、盐岩为主，夹薄层砂岩，埋深超过 6000m ，温度超过 170∘C ，地层压力最高约 170MPa ，属超深、高温、高压油气井。（剩余17064字）