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蠡县斜坡中南部勘探程度相对较低,对已知油藏的油气富集规律和成藏模式认识不清,以往认为该区主要以“阶梯式”运移成藏模式为主,但与实际油藏的分布存在矛盾。经过对斜坡中南部的断层活动期次和沉积体系的研究,认为该区垂向输导受晚盛晚衰断层的控制,为连通砂体提供了油气侧向输导途径。综合分析已知油藏的分布并进行油源对比研究,可以得出斜坡中南部的成藏模式具双油源、长距离、多层位、浅层平行运聚的特点。根据这一特点指明了下一步滚动勘探的方向和思路,即“立足找浅层,地震寻构造,精细画岩性”。
The exploration in the south-central part of Yuxian slope is relatively low, and the understanding of hydrocarbon accumulation laws and reservoir-forming patterns of known reservoirs is unclear. In the past, this area was mainly dominated by “ladder-like” migration and accumulation models There is a conflict with the actual reservoir distribution. After the study of the active faults and depositional systems in the central and southern part of the slope, it is considered that the vertical transmission in this area is controlled by the Late Late Shoring fades, providing a lateral oil and gas transport route for connecting sand bodies. Based on a comprehensive analysis of the distribution of known reservoirs and comparative study of oil sources, it can be concluded that the hydrocarbon accumulation modes in the central and southern parts of the slope have the characteristics of double oil source, long distance, multi-layer and shallow parallel transport. According to this feature indicates the next direction of rolling exploration and ideas, that is, “based on looking for shallow, seismic structure, fine painting lithology.”