澳大利亚北卡那封盆地油气地质特征及勘探潜力分析

PETROLEUM GEOLOGICAL FEATURES AND EXPLORATION POTENTIAL ANALYSES OF NORTH CARNAVON BASIN, AUSTRALIA

白国平 殷进垠

Bai Guoping Yin Jinyin

中国石油大学石, 油天然气成藏机理教育部重点实验室, 北京, 102249 2. 中国石油化工股份有限公司, 石油勘探开发研究院, 海外研究中心, 北京, 100083

Key Laboratory for Hydrocarbon Accumulation of Education Ministry, China University of Petroleum, Beijing 102249, China 2. Overseas Research Center, Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083, China

北卡那封盆地是澳大利亚最主要的产油气盆地,也是世界上主要的富气盆地之一。盆地经历了裂前、早期裂谷、晚期裂谷和裂后被动大陆边缘发育阶段,充填了以中生界占绝对优势的厚约15 km的沉积层系。三叠系—下白垩统内发育了4套烃源岩,油气主要储于上三叠统、上侏罗统和下白垩统。区域上,石油绝大部分分布于巴罗—丹皮尔次盆地,而滦金台地和埃克斯茅斯高地则富集了大部分的天然气和凝析油。截至2004年底,盆地内已发现石油(包括凝析油)5.27×108t,天然气28 424×108m3。油气地质综合分析表明该盆地仍具有良好的勘探前景,勘探程度中等的埃克斯茅斯高地、埃克斯茅斯次盆地和比格尔次盆地的勘探潜力最大。

The North Carnarvon Basin is the premier oil and gas producing basin in Australia and one of the world-class gas-rich basins.It experienced pre-rifting,early rifting,late rifting,and post-rifting passive margin development stages.The basin was filled with about 15 km thick sediments,which are overwhelmingly dominated by the Mesozoic.Four sets of source rocks were developed in the Triassic-Lower Cretaceous succession.Oil,condensate and gas are mainly reservoired in the Upper Triassic,Upper Jurassic and Lower Cretaceous.Regionally,oil is mostly distributed in the Barrow and Dampier Sub-basins whereas the Exmouth Plateau and Rankin Platform contain bulk of the condensate and gas.By the end of 2004,5.27×108 tonnes of oil and 28 424×108 m3 of gas had been discovered in the basin.Integrated petroleum geological analyses indicate that the basin has a considerable hydrocarbon prospectivity.The moderately explored Exmouth Plateau,Exmouth Sub-basin and Beagle Sub-basin comprise the most promising areas with the best exploration potential.

中国石化集团公司重大基础研究项目(P99104)

https://doi.org/10.11781/sysydz200703253