資源描述:
《瑪湖凹陷及其周緣石炭-二疊系油氣勘探前景》由會員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、第35卷第3期新疆石油地質(zhì)VoL35.No.32014年6月XINJIANGPETROLEUMGEOLOGYJun.2014瑪湖凹陷及其周緣石炭一二疊系油氣勘探前景陳月0強(qiáng),安志淵,阿布力米提,李嘯1,許秋來,張鸞灃(1.中國石油新疆油田分公司勘探開發(fā)研究院,新疆克拉瑪依834000;2.南京大學(xué)地球科學(xué)與工程學(xué)院,南京210023)摘要:準(zhǔn)噶爾盆地瑪湖凹陷及其周緣石炭一二疊系因埋藏深、勘探程度低,對其成藏條件和勘探潛力均認(rèn)識不清。分析了研究區(qū)油氣基本成藏條件后指出,瑪湖凹陷石炭一二疊系發(fā)育3套優(yōu)質(zhì)烴源巖(石炭系、下二疊統(tǒng)佳木河組和風(fēng)城組),它們均處于高成熟演化階段,以形成高熟油氣為主,油
2、氣源充足;研究區(qū)發(fā)育著繼承性前隆背斜、掩伏帶背斜和斷塊圈閉,以及地層、斷層一地層圈閉等非構(gòu)造圈閉;在瑪湖凹陷深層還發(fā)育特殊類型儲集層,包括石炭系佳木河組火山巖與風(fēng)城組白云質(zhì)巖,由于斷裂、裂縫和風(fēng)化殼發(fā)育,其儲集層物性得到改善。研究認(rèn)為,瑪湖凹陷石炭一二疊系具備形成高產(chǎn)油氣藏的基本地質(zhì)條件,可作為盆地勘探的新領(lǐng)域。優(yōu)選了達(dá)1井背斜作為近期首選的鉆探目標(biāo),以期獲得突破。關(guān)鍵詞:準(zhǔn)噶爾盆地;瑪湖凹陷;石炭系;二疊系;油氣成藏;勘探前景文章編號:1001—3873(2014)03—0259—05中圖分類號:TEl12.1文獻(xiàn)標(biāo)識碼:APetroleumExplorationProspectsofC
3、arboniferous-PermianinPeripheralMahuSag,JunggarBasinCHENGangqiang,ANZhiyuan,Abulimiti,LIXiao,XUQiulai,ZHANGLuan~ng2(1.ResearchInstituteofExplorationandDevelopment,Xi~iangOilfieldCompany,Petr.oChina,Karamay,Xinjiang834000,China;2.SchoolofEarthSciencesandEngineering,NanjingUniversity,Nanjing,Jiangsu
4、210023,China)Abstract:ThehydrocarbonaccumulationconditionsandexplorationpotentialoftheCarboniferous—PermianinMahusaganditsperipheryinnorthwesternJunggarbasinhavereceivedlittleresearchattentionduetodeepburialdepthandassociatedlowexplorationdegree.Thispaperanalyzesthebasichydrocarbonaccumulationcond
5、itionsandindicatesthereexistthreesourcesequencesinthisarea,includingtheCarboniferous,theJiamuheformationandtheFengehengformationoftheLowerPermian,whichareallinhighlymaturedevolutionstage,withsuficientoil—gassource,anddominatedbyhighlymaturedhydrocarbons.Inthisstudyarea,largestructuralandstratigrap
6、hictrapsaredevelopedwidely,includinginheritedforelandupliftanticlines,piedmontanticlines,fauhblocktraps,stratigraphicandfault—stratigraphictraps.ItisfoundindeepMahusagthatspecialtypesofreservoirsaredeveloped,suchasvolcanicreservoirsoftheCarboniferousandtheJi—amuheformationandthedolomiticreservoiro
7、ftheLowerPermianFengchengformation.Inaddition,widedevelopmentoffault,fractureandweatheringcrusthasresultedinimprovementofthereservoirsquality.Itissuggestedthatthedeep—buriedlowerhydrocarbonaccumu—lationassemblage