摘要
由于天然气与石油在成藏条件上的差异 ,天然气成藏运聚动平衡原理是研究天然气成藏特征的基本思路 ,可以聚集量与时间两大要素 ,总结中国气田复杂的成藏历程为 :超晚期 (新近纪—第四纪 )生烃成藏型 ;晚期(古近纪—新近纪 )生烃成藏型 ;早期 (中生代为主 )生烃聚集、晚期 (新近纪—第四纪 )定型成藏型 ;早期 (中生代为主 )生烃成藏型。综观中国气田的成藏历程 ,虽然在不同类型盆地中有较大差异 ,但是喜马拉雅期的构造演化历史对于中国天然气的成藏及分布有重要的控制作用。其作用可归结为促成与破坏 ,并以促成作用为主。目前中国天然气勘探的 3个主要领域 :中西部前陆盆地、三大克拉通复合盆地 (四川、鄂尔多斯、塔里木 )以及近海的裂谷、陆缘盆地 ,表明了以晚期、超晚期成藏、定型为主的盆地和坳陷是中国天然气最主要富集地区。
There are some differences in reservoiring conditions between oil and natural gas, dynamic equilibrium theory of gas migration ,accumulation and reservoiring would then be regarded as the basic method to study the reservoiring characteristics of natural gas. Two key factors ,volume and time of gas accumulation, can be used to sum up the complicated reservoiring courses of gasfields in China, including: super-late (Neogene-Quaternary) hydrocarbon generating and resevoiring type; late (Eogene-Neogene) hydrocarbon generating reservoiring type; early (mainly in Mesozoic) hydrocarbon generation and accumulation ,and lately (Neogene-Quaternary) reservoired and finalized; and early (mainly in Mesozoic) hydrocarbon generating and reservoiring type.Although there are great differences of reservoiring characteristics in different type basins , the tectonic evolutional history in Himalayan period has played an important role in controlling the reservoiring and distribution of natural gas in China, which can be concluded as promotion and destruction, and the former is dominant. There are currently three main regions of natural gas exploration in China, including foreland basins in west-central China, three large cratonic composite basins (Sichuan basin,Ordos basin and Tarim basin) ,and offshore rift and continental margin basins. The study shows that the most prolific regions in China are those basins and depressions which have dominantly been reservoired and finalized in late and super-late periods.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2003年第2期103-110,共8页
Oil & Gas Geology
关键词
中国
天然气
成藏特征
运聚动平衡
China
natural gas
reservoiring characteristics
dynamic equilibrium of migration and accumulation
