摘要
澳大利亚是世界主要的油气产区之一,按其发育的构造位置及主要生烃层位的不同,大体可分为被动陆缘盆地、大陆裂谷盆地以及克拉通盆地。从澳大利亚的构造沉积演化史出发,以最新的油气储量资料为基础,通过对该地区22个含油气盆地的地理位置、油气属性、发现年份、储层时代、储层岩性、埋藏深度、圈闭类型等参数进行分析,探讨澳大利亚各类盆地的油气分布特征。统计分析表明,澳大利亚油气分布的特点为：澳大利亚是一个富气的大陆,油气分布总体表现为＂气多油少＂的特征,其中西北大陆架油气最为富集,被动陆缘盆地的油气储量最高;油气田发现数量呈逐年递增的趋势;中生界为其主力产层,储集岩性主要为砂岩,克拉通盆地内非常规能源丰富;油气产层埋深集中在2~4km,圈闭类型主要为构造圈闭;克拉通盆地内的非常规天然气虽然开发程度还较低,但已证实资源丰富,随着世界天然气市场需求的增加以及勘探技术更加成熟,克拉通盆地非常规油气将会是未来勘探开发的重点。
Australia is one of the main oil and gas production areas in the world.As structural location and hydrocarbon-generating horizon are different,sedimentary basins in this area can be classified as ： passive continental margin basin,continental rift basin and cratonic basin.According to the tectonic sedimentary evolution of Australia,oil and gas distribution characteristics of each type of basins in Australia were discussed after geographic location,oil and gas properties,discovery time,reservoir chronology,reservoir lithology,buried depth and trap types of 22 petroliferous basins were analyzed based on the latest reserve data.The statistic results show that Australia is a land of rich gas with more gas and less oil in general.Oil and gas were rich in the Northwest Shelf mainly and the highest oil-gas reserves were in the passive continental margin basin.The number of oil-gas fields discovered was increasing year by year.Oil and gas were mostly accumulated in sandstone reservoirs in the Mesozoic group,and unconventional energy was rich in the cratonic basins.Oil and gas were mostly buried in depth of 2 to 4km,and trap type is mainly the structural one.The unconventional natural gas in the cratonic basins has been developed in low degree,but it is proved as rich resources.So it will be the future exploration target along with the increasing market demands of the natural gas and devel-oping of more mature exploration technologies.
出处
《中外能源》
CAS
2015年第10期36-44,共9页
Sino-Global Energy
基金
中国石油天然气股份有限公司国家科技重大专项"全球剩余油气资源研究及油气资产快速评价技术(二期)"(编号:2011ZX05028)
中国石油天然气股份有限公司专项"全球油气资源评价与利用研究"(编号:2013E-0501)资助
关键词
澳大利亚
含油气盆地
构造演化
油气分布
非常规油气
Australia
petroliferous basins
tectonic evolution
oil and gas distribution
unconventional oil and gas
