华北盆地的构造演化及油气分布

TECTONIC EVOLUTION AND HYDROCARBON DISTRIBUTION IN NORTH CHINA BASIN

陈光汉

Chen Guanghan

地质矿产部华北石油地质局

North China Bureau of Petroleum Geology, Ministry of Geology and Mineral Resources

华北盆地各主要拗陷都是张性盆地,构造演化的三阶段形成盆地发育三期,由于基底结构、沉降速度等因素的影响,其成油条件不同,形成不同类型的油气藏,垂向上为三层含油结构,其中油气主要富集在断陷充填期,为下第三系自生自储油气藏。

Since Mesozoic,the platform of east China had been transformed to active continental marginal belts.Structural units of faulted upwarping,falldown depression,platform folding belts had been formed through tectonic deformations during Indo-chinese,Yanshan and Himalaya periods.Under stretching force,north China basin formed itself into a tensional falldown basin.The conditions for oil generation were different due to basemental structure and subsidence rate.There are three stages of structural evolution for tentional basin,relative to basin development are early period of faulted subsidence,filling period of faulted subsidence and regional depressing period.Three stratified structures,i.e hydrocarbon pool in burial hills,original hydrocarbon pool and draped hydrocarbon pools were developed.Hydrocarbons were mainly accumulated in the pools capable of self generation and preservation,from lower Tertiary of filling period of faulted subsidence.

https://doi.org/10.11781/sysydz199001001