泌阳凹陷陆相页岩油富集主控因素分析

Discussion on main controlling factors of continental shale oil enrichment in Biyang depression

南襄盆地泌阳凹陷是中国东部典型的富油凹陷,该区核桃园组页岩具有纵向厚度大、横向分布广、有机碳含量高、储集空间发育、脆性矿物含量高、油气显示丰富等特征,陆相页岩油形成条件有利。研究认为泌阳凹陷陆相页岩油富集主要受页岩岩相、有机质丰度及赋存方式、热演化程度、储集物性、成岩作用及裂缝发育程度等关键因素控制。资源评价结果表明泌阳凹陷陆相页岩油资源量丰富,部署的页岩油水平井BYHF1井实施15级分段压裂,最高日产油23.6 m3,展示了泌阳凹陷陆相页岩油良好的勘探开发前景。

Biyang depression in Nanxiang basin is a typical oil-enriched depression in east China.The shale in Hetaoyuan formation is favorable for shale oil and has the characteristics of big thickness,high organic carbon content,developed reservoir space,high brittleness mineral content and abundant hydrocarbon shows.The research results show the continental shale oil enrichement is mainly controlled by shale lithofacies,organic matter abundance,occurrence mode,thermal evolution degree,reservoir physical property,diagenesis and fracture development degree.Resource evaluation results indicate that the Biyang continental shale oil resource is abundant.The 15-level staged fracturing implementation in horizontal well BYHF1 has achieved the highest daily oil production of 23.6 m3,presenting good prospects in biyang continental shale oil exploration and development.