陜北瓦窯堡油田中山川區(qū)延長組長4+5油層組儲層特征及評價.pdf

1、分類號：P57，P58，P611071006271342壤害太海碩士學(xué)位論文陜北瓦窯堡油田中山川區(qū)延長組長45油層組儲層特征及評價導(dǎo)師姓名職稱申請學(xué)位級別李旭芬蘇春乾副教授碩士學(xué)科專業(yè)名稱礦物學(xué)巖石學(xué)礦床學(xué)論文提交日期切7年朋d日論文答辯日期砌7年辛月五日學(xué)位授予單位長安大學(xué)答辯委磊i—二刁乙[二學(xué)位敝評閱人痙塞垂豸弛ABSTRACTZhongshachuanareaofWayaobaooilfieldisatypicalextralo

2、wpermeableoilfieldthatitisinearlydevelopmentstageatpresent，andChang2，Chang45andChan96aremainoilbeatingseriesinLateTriassicChang45oilbearingbedisregardedasmianresearchobjectofthispaper，accordingtoitsdrilling，logging，outcr

3、opobservationandkindsofassayeddataandthroughtheseexperimentalmethodssuchastheXraydiffraction，physicalpropertytest，scanningelectronmicroscope，intrusivemercuryexperimentetc，thepaperanalyzedlithologyporestructure，diagenesis

4、，physicalpropertynon—homogeneouspropertyofChan945reservoirs，whichprovidesgeologicalbasisfordevelopmentadjustmentoftheareaThesisofthestudymadeasfollows：Chang45reservoirofYanchangformationisdividedintotwooilsubgroups：Chan9

5、451andChang452Chang452oilbearingbedisoneofthemajoroilproducingformationsinthestudyarea，Chang452formationisdividedintothethreebeds：Chang4521Chang4522andChang4523；TheChang45memberbelongstoasedimentationfaciesofZichang—Ansa

6、ideltaMicro—faciesaremainlyoccurredinthesubmergedistributarychannelanddistfibutarybaythechannelisadistributionofNE—SWtendingandastablechanneldevelopment，moreveritssandbodiesarefundamentallytogether；Chan945reservoirsismai

7、nlyfinearkoseandgrayishfeldsparsandstoneCompositionalmaturityislowandtexturalmaturityismediumtopreferablyGrainsizesortingisbetterandthegrainshapeismostsubangular；Theresearchoftheelasticreservoirindicatesthatdominantdiage

8、nesistypesarecompaction，cementationreplacementanddissolution，furthermore，diagenesishasexperiencedfromlatediagenesisAstagetolatediagenesisearlyofBstage；WedrawtheconclusionthatthereservoirspaceoftheChang6oilbeatingisdomina

9、tedbyintergranularpore，andsecondarydissolutionpore，mainminimalfinethroatandfinethroatsarecausedbylowpermeability，averagepermeabilityis0。77x103btm2andporosityisl018％whichformedtheextralowpermeableandultralowpermeablereser

10、voir；Porethroattypesaremediumfineporeandthroat，small—finepore—finethroatandfineporefinethroat—microthroat，andalittlemacroporousmediumporeandcoarsethroat；ReservoirsensibilityofYanchangformationisweakinzhangshanchuanarea，f