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1、學(xué)兔兔www.xuetutu.com天然乞地第32卷第2期0IL&GASGE0L0GY2011年4月文章編號:0253—9985(2011)02—0265—09緬甸D區(qū)塊石油地質(zhì)特征及勘探潛力李紅,曹永斌,王新云(1.中國石化國際石油勘探開發(fā)有限公司,北京100728;2.中國石化北京溫菲爾德石油技術(shù)開發(fā)有限公司,北京100083)摘要:緬甸D區(qū)塊位于伊洛瓦底盆地中西部,主要勘探層系始新統(tǒng)發(fā)育東、西兩大三角洲沉積體系。沉積相以三角洲平原一前三角洲亞相以及淺海相為主,構(gòu)造演化主要經(jīng)歷了始新世的統(tǒng)一沉降期、漸新世一中新世的差異沉
2、降期和上新世以后的逆沖推覆期3個階段,形成了南北走向、東西分帶的“四隆二凹一斜坡”的構(gòu)造格局。烴源巖以塔本組的灰色泥巖和煤系泥巖以及朗欣組的暗色泥巖為主,有機(jī)質(zhì)豐度高,具有非常好的生烴能力。蓬當(dāng)組、塔本組和提林組3套儲一蓋組合保證了區(qū)域油氣的有效聚集和保存。圈閉類型有斷曇控制的背斜圈閉和砂巖透鏡體圈閉兩種。烴源巖熱演化研究表明,區(qū)域生烴時間、運(yùn)移方向、儲蓋組合、圈閉形成等戍藏條件配置關(guān)系合理,D區(qū)塊油氣有利富集區(qū)主要集中在3個構(gòu)造帶上,分別是Patolon背斜帶、Mahudaung背斜帶和Thingadon復(fù)向斜帶。關(guān)鍵詞:
3、石油地質(zhì)特征;成藏組合;有利區(qū)帶;勘探潛力;D區(qū)塊;緬甸中圖分類號:TEl21.1文獻(xiàn)標(biāo)識碼:APetroleumgeologiccharacteristisandexplorationpotentialofBlockDinBurmaLiHong一,CaoYongbin一,WangXinyun(1.SLYOPECInternationalPetroleu,,jExplorationandProductionCompany,Beijing100728,China;2.BeijingWinfieldOilTechnologica
4、lDevelopmentandServiceCo.Ltd.,SINOPEC,Bering100083,China)Abstract:BlockDlocatedinthewestern—centralofI~awaddybasininBurma,hastwomajorEocenedeltaicsedimentary"systemswithoneintheeastandtheotherinthewest.ThemainsedimentaUfaciesincludedeltaplain—prodeltaandshallowmann
5、efacies.BlockDexperiencedthreemaintectonicevolutionphasesincludingtheEoceneunitedsubsidence,theOligocene—Miocenedifferentialsubsidenceandthepost—Plioceneoverthrus—ting.ThetectonicframeworkofBlockDischaracterizedbyNS—trendingandEW—zoning“fouruplifts.twode—pressionsa
6、ndoneslope”.ThequalitysourcerocksinBlockDaredominatedbytheTabyinFonnationgraymudstoneandcoal—seammudstone,andtheLaungsheFormationdarkshale.Theyfeatureinhighorganicabun—danceandhighhydrocarbon—generationpotentia1.Moreover,threereservoir—sealcombinationsinthePengdang
7、,KabawandTabyinformationsprovidefavorableconditionsforeffectivehydrocarbonaccumulationandpreserva—tion.TherearetwotrapstylesinBlockD,includinganticlinetrapcontrolledbyfaultsandsandlenstrap.Studyofthermalevolutionofsourcerocksindicatesthatthetimingofhydrocarbongener
8、ation,migration,trapformationandreservoir·sealcombinationisrationa1.ThepotentialplaysofBlockDmainlyoccurinthreestrue—ruralbeltsincludingPatolonan