苏里格地区致密砂岩地层水赋存状态和产出机理探讨-王晓梅

34420127PETROLEUMGEOLOGY＆EXPERIMENTVol．34No．4Jul．20121001－6112201204－0400－0612231．7100692．7100653．710021。、。、。、3。TE133AOccurrencestateandproductionmechanismofformationwaterintightsandstonereservoirsofSuligeareaOrdosBasinWangXiaomei12ZhaoJingzhou2LiuXinshe31．DepartmentofGeologyNorthwestUniversityXi’anShaanxi710069China2．SchoolofEarthSciencesandEngineeringXi’anShiyouUniversityXi’anShaanxi710065China3．ChangqingOilfieldBranchCompanyPetroChinaXi’anShaanxi710021ChinaAbstractTheSuligegasfieldintheOrdosBasinisthelargestunconventionalcontinuoustightsandstonereser-voirinChina．Therearemanywater-producinggaswellsintheUpperPaleozoicstratainthewestandthenorthofSuligeregionwherethereservoirhasnounitivegas－waterinterface．Theintrinsicrulesofgas－waterdistribu-tionarecomplicatedinthisarea．Basedonthedynamicsofhydrocarbonaccumulationintightsandstonein-tegratingoilandgasaccumulationelementsandreservoirpresentmicroscopicporestructureandfluidflowmecha-nismtheoccurrencestateandproductionmechanismofformationwaterinSuligeregionhavebeendiscussedinthispaper．Ithasbeenshowedthatthemainreasonforcomplicatedgas－waterdistributionisthedifferencebe-tweenhydrocarbongenerationexpansiveforceandcapillarypressure．Theoccurrencestateofformationwaterinthisareabehaves3typesi．e．irreduciblewatercapillarywaterandfreewater．Theirreduciblewaterisbasi-callylocatedinthehighgasgenerationintensityareaintheeastofSuligeregionwherethetestinggaswellsaremainlygas-producingones．ThecapillarywaterisnormallylocatedinthelowgasgenerationintensityareainthewestandthenorthofSuligeregionwherethetestinggaswellsaremainlygas/water-producingones．Thefreewaterissporadicallylocatedinthearea．KeywordsmicroscopicporestructureformationwatertightsandstoneSuligeregionOrdosBasin。1－3。、、、、、4－6。2012－01－042012－06－27。1975—。[e-mail]。2008ZX05007－0052010QN004。7－8。、、、、9－13。、14－23。。181。600m50～200m100m24－25。18Fig．1Structureandtestinggaswellsplanedistributiontopof8thmemberofShiheziFormationSuligeregionOrdosBasin、。26－31。1、。2010128、1289406。0．12～72m3/d7．1m3/d。1。22．1、32－33。—pc=hggρw－ρg±ΔhρwgpchggρwρgΔh。2．2、、。。32－34pe=pcr+ρwgh1+ρggH±ρwgΔhpepcrρwgΔhHh1。·104·4．、、35。pe=pcr+ρwgh1+ρggH36。。0．16MPa/hm100m0．16MPa。、。3—、2037－38。3．1。、。、、。3。0．2μm、0．1μm39。“”。Su6983343．42m1．75μm2a40．9×104m3/d。。。Su6413486．38m0．03μm2b0．12×104m3/d。3．2—。。、2038。Su216×108m3/km283396．4～3405．6m20．6Ω·m。Su23401．76m30．1μm1．0μm50%0．39μm。4．18×104m3/d19．1m3/d。3．3、。2Su69Su64Fig．2FrequencydistributionofporeradiusinperforatedzoneofwellsSu69andSu64SuligeregionOrdosBasin·204·343Su2Fig．3FrequencydistributionofporeradiusinperforatedzoneofwellSu2SuligeregionOrdosBasin4Su60Fig．4FrequencydistributionofporeradiusinperforatedzoneofwellSu60SuligeregionOrdosBasin2038、“”。Su6081．21μm4、。25．8m3/d。44．1。、—、———。。40。。Su9083639．8～3644．6m33．91%Su90842．61%1．2×104m3/d5a。。7812784．4～2790．4m55．77%78152．7%5b0．6×104m3/d1．2m3/d。4．28、6。16×108m3/km240%。。5Su908781Fig．5Relativepermeabilitycurvesof8thmemberofShiheziFormationinwellSu90and1stsectionofShanxiFormationinwellZhao78SuligeregionOrdosBasin·304·4．68Fig．6OccurrencestateandproductiondistributionofformationwaterinupperHe8segmentSuligeregionOrdosBasin16×108m3/km2。1100%。51。2、、。、。3、3。。16×108m3/km2。16×108m3/km2。1MastersJA．DeepbasingastrapwesternCanadaJ．AAPGBulletin1979632152－181．2LawBE．Basin－centeredgassystemsJ．AAPGBulletin200286111891－1919．3ShanleyKWCluffRMRobinsonJW．Factorscontrollingprolificgasproductionfromlow-permeabilitysandstonereservoirsJ．AAPGBulletin20048881083－1121．4．J．20103091－8．5．J．2011334364－372．6．8J．2012343281－284．18Table1GastestingdataoffreewaterwellsinupperHe8segmentSuligeregionOrdosBasin/m/m3/m3/%/104m3·d－1/m3·d－1Su673453．8～3458．8241．00247．201030．019810．20Su603664．2～3673．8278．82273．10980．000025．80Su1883638．0～3642．0117．20107．20910．034812．60Su1643658．1～3662．9142．10190．501340．055215．00Su1673645．4～3648．872．00132．701840．000014．00Su1173574．0～3579．1128．10146．101140．049016．00Su1313547．9～3551．0187．30203．401090．03338．40Su1183512．5～3524．2163．10175．801080．015916．80Su1843606．0～3616．6204．90225．001100．070724．00Su563430．0～3432．5209．80165．40790．088720．90·404·347．、R．2011．8．J．2011273857－866．9．J．2011324560－567．10．“”J．2009363307－319．11．J．2010323263－267．12．J．2011322157－164．13．J．2010316707－714．14．J．2003．38131－43．15．J．200020611－15．16．8J．201032165－69．17．J．2005262230－236．18．J．200728637－42．19．6J．2010322161－165．20．J．2010315767－773．21．J．2010315748－761．22．8J．2007283413－418．23．86J．2010322166－172．24．5381J．2011322236－244．25．J．2007112－16．26．J．200431369－71．27．J．2009276221－229．28．8、1J．200929466－74．29．8J．200929317－20．30．1、8J．2011223482－487．31．J．20113121－8．32J．200835173－79．33．J．2001225101－103．34．J．200393458－466．35．—J．2011384409－417．36．J．200627243－47．37．M．1991158－159．38．8J．2011255931－937．39．M．2008117．40．J．200613681－83．·504·4．