南襄盆地泌阳凹陷油气成藏体系及资源潜力

南襄盆地泌阳凹陷核桃园组烃源岩发育，有机质丰度高，成烃潜力大，主力烃源岩大部分已经成熟，形成了丰富的油气资源；而南部和北部扇三角洲体系大多数都伸入生油区内，形成纵向交互叠置的多套生储盖组合。油气输导体系主要由砂体和断裂系统构成，在砂体内部，由孔隙结构分布差异形成油气优势运移通道。为了在油气勘探上有所突破，经研究认为，下一步应重视深层系和浅层系的油气勘探。

Hydrocarbon Accumulation System and Its Resource Potential in Biyang Depression of Nanxiang Basin

Source rocks are developed in Hetaoyuan Formation of Biyang depression,where organic matter abundance is high,the potential of hydrocarbon genesis is high,most of the major source rocks are mature and rich hydrocarbon resources are formed.Both in the south and north,the fan delta systems extends mostly into the oil source area,many sets of crossover and superposed assemblages of source,reservoir and cap rocks are formed vertically.The hydrocarbon transferring system are mainly composed of sandbodies and fault system,the differences between the pore structural distribution within the sandbodies result in an advantageous hydrocarbon migrating path.So far,the exploration and exploitation of the oil and gas mainly concentrate on the above H3 in Biyang Depression.As it has been seriously explored and developed,to find rich oil and gas traps becomes more and more difficult.In order to increase the oil reserves and stabilize the yields,the exploration vision should be expanded and the exploration field should be enlarged.The next step exploration for Biyang Depression should focus on the oil and gas of the deeper layer and the shallower layer.The deeper layer system includes the lower H3 and Dacangfang Formation.The shallower layer system includes the H2,H1 and the unconformity top of Liaozhuang Formation.