澳大利亚西北陆架中生界生储盖组合特征  

MESOZOIC SOURCE-RESERVOIR-SEAL ASSEMBLAGE CHARACTERISTICS IN THE NORTHWEST SHELF OF AUSTRALIA

作　　者：冯杨伟[1] 屈红军[1] 张功成 范玉海[1] 关利群[1] 雷露[1] 

机构地区：[1]西北大学大陆动力学国家重点实验室地质学系,西安710069 [2]中海油研究总院,北京100027

出　　处：《海洋地质动态》2010年第6期16-23,共8页Marine Geology Letters

基　　金：国家科技重大专项(2008ZX05025-006);国家重点基础研究发展计划(973)项目(2009CB219408)

摘　　要：澳大利亚西北陆架是一个贫油富气的地区,在近年的勘探开发中显示出广阔的前景。区域上包含4个盆地和1个造山带:北卡那封盆地、柔布克盆地、布劳斯盆地、波拿巴盆地和帝汶—班达褶皱带。西北陆架油气绝大多数集中在中生界。中生界发育4套主要烃源岩:三叠系湖相泥页岩、下—中侏罗统海相和海陆交互相碳质泥岩和煤系、上侏罗统海相页岩及下白垩统海相泥页岩;主要储集岩为中—上三叠统三角洲—边缘海相砂岩、下—中侏罗统砂岩、上侏罗统砂岩和白垩系砂岩;主要区域性盖层是下白垩统海相泥页岩。根据生储盖组合的沉积环境,主要发育海生海储海盖型和陆生陆储陆盖型两大生储盖组合类型。海生海储海盖型生储盖组合广泛分布于西北大陆架,是区域最重要的成藏组合。The Northwest shelf of Australia is rich in gas and poor in oil,and it takes on a wide prospect in recent years＇ exploration and exploitation.There are four basins and one orogenic zone in the area：North Carnarvon Basin,Roebuck Basin,Browse Basin,Bonaparte Basin and Timor-Banda orogenic zone.It is concluded that most hydrocarbon of Northwest shelf was accumulated during Mesozoic.The petroliferous area of Northwest shelf develops four main hydrocarbon source rocks,such as Triassic lacustrine shale,lower-middle Jurassic marine/paralic carbargilite and coal measure strata,upper Jurassic marine shale and Cretaceous marine shale;the main reservoirs are middle-upper Triassic delta-marginal sea sandstone,lower-middle Jurassic sandstone,upper Jurassic sandstone and Cretaceous sandstone;the main regional seal is lower Cretaceous marine shale.On the basis of depositional environment,source-reservoir-seal assemblages in this area include two main different types,＂marine source-marine reservoir-marine seal＂ and ＂continental source-continental reservoir-continental seal＂.The former can be generally found in the Northwest shelf,and it is considered as the most important accumulation form in the area.

关 键 词：澳大利亚西北陆架 北卡那封盆地 碳质泥岩 区域性盖层 生储盖组合 

分 类 号：TE122.2[石油与天然气工程—油气勘探]