Hydrocarbon generation characteristics and reservoir forming contribution of Enping Formation source rocks in Huidong new area,Huizhou sag,Pearl River Mouth basin
Hydrocarbon generation characteristics and reservoir forming contribution of Enping Formation source rocks in Huidong new area,Huizhou sag,Pearl River Mouth basin
Enping Formation has a thickness of 3 000 m in Huidong new area of Huizhou sag,Pearl River Mouth basin,and its sedimentary characteristics are generally characterized by continental shallow water and wide basin environment.The hydrocarbon generation characteristics and scales of Enping Formation source rocks have always been one of the basic problems in the exploration of the study area.In order to clarify the above two key issues,this study,guided by the combination of tectonics,sedimentology and organic geochemistry and based on the data of laboratory analysis,has re-recognized the source rock characteristics,hydrocarbon generation potential and main reservoir forming contribution areas of Enping Formation in this area.The research shows that the main body of Enping Formation in Huidong area develops delta-shallow lake sediments,and the source rocks include coal,carbonaceous mudstone and dark mudstone.The organic matter abundance of dark mudstone is medium-good,and the type of organic matter is type Ⅱ,which has characteristics of early oil generation and late continuous gas generation.The calculated crude oil geological resources in the basin are nearly 3 × 108 t,and the natural gas resources are nearly 500 × 108m3,with great resource potential.The oil-gas source correlation shows that the oil and gas reservoirs derived from the source rocks of Enping Formation are mainly developed in Huidong area,and the next most favorable exploration direction in Huidong area is the deep Enping Formation traps adjacent to the source rocks and the shallow Zhujiang and Zhuhai formation traps with good matching of"source rocks-fault-structural ridges-trap".
关键词
恩平组烃源岩/生烃特征/资源潜力/成藏贡献/惠东新区/珠江口盆地/惠州凹陷
Key words
Enping Formation source rocks/hydrocarbon generation characteristics/resource potential/reservoir forming contribution/Huidong new area/Pearl River Mouth basin/Huizhou sag
维普
万方数据