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不整合作为油气运移通道,对油气藏的分布具有明显的控制作用。通过分析济阳坳陷、准噶尔盆地和塔里木盆地不整合的结构类型、岩性和物性等特征,研究已发现油气藏的分布特征,指出不整合面作为油气长距离横向运移通道,需要满足严格的构造地质背景及不整合垂向结构类型。不整合区域分布稳定、上部底砾(砂)岩或下部半风化岩石高孔渗性连通层有利于油气的长距离运移,反之则只能作为油气局部运移通道或无效通道。在不整合输导性分析中要注重不整合垂向岩性配置和区域构造沉积背景的分析,同时应结合断层和砂体等输导要素,客观、全面地评价不整合在油气运聚成藏过程中的作用。
Unconformity as an oil and gas migration channel, the distribution of the reservoir has obvious control. Based on the analysis of unconformity structural types, lithology and physical properties in the Jiyang depression, Junggar basin and Tarim basin, the distribution characteristics of the discovered reservoirs have been studied. It is pointed out that the unconformity as the long-distance lateral migration channel of oil and gas needs to meet strict Tectonic and geological background and unconformity vertical structure type. The distribution of unconformity is stable. The upper perbasal (upper) gravel (sand) rock or high porosity and permeability of the lower semi-weathered rock is conducive to the long-distance migration of oil and gas, otherwise it can only act as local migration channel or invalid channel of oil and gas. The analysis of unconformity vertical lithologic configuration and regional tectonic sedimentary background should be emphasized in the analysis of unconformity transmissibility. At the same time, the unconformity should be evaluated objectively and comprehensively in combination with the transport elements such as faults and sand bodies in hydrocarbon migration and accumulation The role of the process.