摘要
简要阐述了中国陆上主要叠合盆地中下组合烃源岩、储层和油气藏分布等基本油气地质特征,指出了进一步勘探的领域。认为:叠合盆地中下组合普遍发育有利烃源岩,成熟度普遍较高,因而以生气为主;具有多期成藏特点,且以晚期为主;叠合盆地中下组合发育碳酸盐岩、火山岩、砂砾岩与变质岩四大类储层,它们的储集物性受埋深影响较小,在较大埋深下仍可发育优质储层;叠合盆地中下组合油气藏以岩性、地层及复合型为主,相态复杂,是多期成藏的结果;叠合盆地中下组合油气分布与古隆起发育、沉积或火山相带以及断裂带、不整合面发育密切相关;叠合盆地中下组合是中国陆上含油气盆地未来勘探的重点领域之一。
This paper has briefly discussed the basic petroleum geological conditions, such as the source rock, reservoir and pool distribution, in the middle and lower combinations of onshore superimposed basins in China and highlights the area for future exploration. Several conclusions have been reached： Firstly, favorable source rocks with high maturity which mainly generates natural gas is extensively developed in the middle and lower combinations of onshore superimposed basin, oil and gas pools developed in this situation have a characteristic of multiple reservoir formation periods and often formed lately. Secondly, four kinds of reservoirs are developed： carbonate rock, volcanic rock, sand-gravel rock and metamorphic rock; their physical properties are slightly affected by depth, so high quality reservoir can still develop in a greater burial-depth. Thirdly, the oil and gas pools with complex phase-state are mainly composed of lithologic, stratigraphic and composite types, which are the result of multiple reservoir formation. Finally, hydrocarbon distribution is considered to have a close relationship with the development of palaeo-uplift, sedimentary facies, volcanic facies distribution, fault zone and unconformity development. Thus the middle and lower combinations are one of the most favorable regions for future exploration in onshore superimposed basins.
出处
《地学前缘》
EI
CAS
CSCD
北大核心
2008年第2期120-126,共7页
Earth Science Frontiers
基金
国家重点基础研究发展计划"973"项目(2007CB209500)
关键词
叠合盆地中下组合
碳酸盐岩
火山岩
古隆起
middle and lower combinations of superimposed basin
carbonate rock
volcanic rock
paleouplift
