阿拉斯加北坡盆地成藏组合划分与资源潜力评价  

Classification and Resource Evaluation of the Hydrocarbon Plays in the North Slope Basin,Alaska

作　　者：李刚 孟秋含[1,2,4] 张凯逊[5] 白国平 胡靖靖 邱海华[1,2] 陈君 LI Gang;MENG Qiuhan;ZHANG Kaixun;BAI Guoping;HU Jingjing;QIU Haihua;CHEN Jun(College of Geoscience,China University of Petroleum(Beijing),Beijing 102249,China;National Key Laboratory of Petroleum Resources and Engineering,China University of Petroleum(Beijing),Beijing 102249,China;School of Energy Resources,China University of Geosciences,Beijing 100083,China;China National Offshore Oil Corporation Research Institute CoLtd,Beijing 100028,China;Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China)

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]中国石油大学(北京)油气资源与工程全国重点实验室,北京102249 [3]中国地质大学(北京)能源学院,北京100083 [4]中海油研究总院有限责任公司,北京100028 [5]中国地质科学院地质力学研究所,北京100081

出　　处：《现代地质》2024年第2期322-334,共13页Geoscience

基　　金：中国地质调查局地质调查项目(DD20221810);国家自然科学基金项目“特提斯域构造沉积演化对源盖关键成藏要素的控制作用及其油气富集响应”(91755104)。

摘　　要：位于北极地区的阿拉斯加北坡盆地(North Slope Basin, Alaska)是全球最具有勘探潜力的盆地之一。对该盆地进行科学研究,有助于提升对北极地区含油气远景的认知,对于我国在该地区能源战略的制定具有基础性意义。本文基于埃信华迈(IHS Markit)最新数据资料,在盆地油气地质特征分析的基础上,进行含油气系统和成藏组合划分与研究。以成藏组合为评价单元,对盆地待发现油气资源量进行评估,并优选出有利勘探区带。结果表明,阿拉斯加北坡盆地已发现油气藏主要分布于巴罗(Barrow)穹隆,该构造单元内的油气储量占盆地总储量的77.3%;油气主要储于白垩系和三叠系储集层,两者分别储集了盆地内44.0%和45.8%的油气储量。盆地内主要发育中生界复合含油气系统、新生界含油气系统和石炭系含油气系统。中生界复合含油气系统可划分出古近系—新近系、白垩系、侏罗系、三叠系和石炭系5个成藏组合。盆地平均待发现可采资源量为36943.8 MMbbl(百万桶,1桶=158.98 L)石油、79711.6 Bcf(十亿立方英尺,1英尺=30.48 cm)天然气和262.1 MMbbl凝析油,合计50491.2 MMboe(百万桶油当量),其中石油占73.1%,天然气占26.3%,凝析油占0.6%。根据本文的研究,优选出2个Ⅰ类有利区带和4个Ⅱ类有利区带。The North Slope basin in Alaska is one of the basins with the most prosperous hydrocarbon exploration potential in the world.Scientific research on this basin will improve the understanding of the oil and gas exploration in the Arctic and is significant for the formulation of energy strategy in this region.Based on the latest available data from IHS Markit and a comprehensive investigation of petroleum geology,we characterized the petroleum systems and plays in the basin.Plays were used as an assessment unit to evaluate the undiscovered petroleum resources in the basin and then the favorable exploration play fairways were delineated.The results show that hydrocarbon accumulations in the North Slope Basin have been found mainly in the Barrow Arch structure unit where 77.3%of the total discovered resources occur.Discovered oil and gas resources were mainly reserved in Cretaceous and Triassic,hosting 44.0%and 45.8%of the total oil and gas reserves,respectively.The basin mainly develops the Mesozoic composite petroleum system,the Cenozoic petroleum system,and the Carboniferous petroleum system.The Mesozoic composite petroleum system can be divided into five plays,as Paleogene-Neogene,Cretaceous,Jurassic,Triassic,and Carboniferous plays.The average undiscovered recoverable resources estimated by using the Monte Carlo simulation were 36,943.8 MMbbl of oil,79,711.6 Bcf of natural gas,and 262.1 MMbbl of condensate,totaling 50,491.2 MMboe,of which 73.1%are oil,26.3%natural gas,and 0.6%condensate.Therefore,the two first class of favorable exploration play fairways and four secondary category of favorable exploration play fairways were targeted in this study.

关 键 词：阿拉斯加 成藏要素 成藏组合 资源评价 有利区带 

分 类 号：P62[天文地球—地质矿产勘探] P618.13[天文地球—地质学]