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1、2009年10月大慶石油地質(zhì)與開發(fā)0ct..2009第28卷第5期PetroleumGeologyandOilfieldDevelopmentinDaqingV01.28No.5DOI:10.3969/J.ISSN.1000—3754.2009.05.006松遼盆地北部深層天然氣地質(zhì)特征及勘探方向任延廣齊景順董景海孫立東(大慶油田有限責(zé)任公司勘探開發(fā)研究院,黑龍江大慶163712)摘要:通過對深層天然氣形成的地質(zhì)條件研究認(rèn)為,北部深層發(fā)育多個斷陷,主要斷陷期為沙河子期,主要烴源巖為沙河子組湖相烴源巖,厚
2、度大,分布范同廣;發(fā)育多種類型儲集層,主要為營城組火山巖儲層,以近火山口爆發(fā)相和溢流相流紋巖物性最好;在登婁庫組二段與泉頭組一、二段區(qū)域蓋層控制下發(fā)育3套生儲蓋組合,以下部組合為主;深層發(fā)育5種天然氣成藏模式,五大因素控制了天然氣的形成與分布。在此基礎(chǔ)上,指出下一步勘探方向為堅持立足徐家圍子斷陷、加大預(yù)探雙城和古龍斷陷、積極準(zhǔn)備林甸斷陷,并指出了有利的勘探區(qū)帶。關(guān)鍵詞:松遼盆地北部;深層;天然氣;烴源巖;火山巖儲層中圖分類號:TEl21文獻(xiàn)標(biāo)識碼:A文章編號:1000—3754(2009)05—0028
3、-05GEoLoGICFEATURESANDEXPLoRAToRYDIRECTIoNoFDEEPGASINTHENoRTHoFSoNGLIAoBASINRENYan—guang,QIJing—shun,DONGJing—hai,SUNLi—dong(ExplorationandDevelopmentResearchInstitute,DaqingOilfieldCompanyLtd.,Daqing163712,China)Abstract:Throughtheresearchongeologiccond
4、ition.itisconsideredthat,multifaultdepressionsaredevelopedindeepzonesinthenorth,themainfaultingperiodisShahezistage,andthemainsourcerockislacustrinesourcerockinShaheziFormationwithbigthicknessandwidedistribution.Multireservoirtypesaredevelopedandthemainr
5、eservoiristhevolcanicreservoirofYingchengFormation,withthebestreservoirpropertiesoccurringinex—plosiveandeffusiverhyolitenearbythevolcaniccrater.Threetypesofsource-reservoir-eaprockassemblagesarede-velopedunderthecontrolofcaprockinMemberⅡofDengloukuForma
6、tionandMemberIandMemberIIofQuantouFormation,withthelowerpartbeingdominant.Fivegasgeneticpatternsaredevelopedindeepzone,withthegasgenerationanddistributioncontrolledbyfivefactors.Basedontheabove,itispointedoutthatthenextstepofgasexplorationistotargetonXuj
7、iaweizifaultdepression,increasetheeffortsonpreliminaryprospectinginShuangchengandGulongfaultdepressions,andactivelypreparefortheexplorationinLindianfaultdepression.Fa—vorableexplorationareasarepresented.Keywords:thenorthofSongliaoBasin;deepzone;naturalga
8、s;hydrocarbonsourcerock;volcanicreservoir大慶油田對深層的研究和探索始于20世紀(jì)70巖性儲層識別、評價困難,深層天然氣勘探成為世界年代中期,由于深層地質(zhì)結(jié)構(gòu)復(fù)雜,斷隆相間、地層級的難題。隨著層序地層學(xué)、含油氣系統(tǒng)理論、火山埋藏深、地溫高、成巖作用強(qiáng),勘探目標(biāo)找不準(zhǔn),特殊巖地質(zhì)學(xué)等地質(zhì)理論的應(yīng)用,開拓了深層的勘探視收稿日期:2009。05.18作者簡介:任延廣,男,1964年生,高級T程師,博十,從事石