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基于探井与地震资料分析、典型油藏解剖等,研究了济阳坳陷不整合结构发育特征,探讨了不整合对油气成藏的作用,阐明了不整合圈闭油气成藏规律,建立了不整合圈闭精细描述方法。研究认为,根据风化粘土层、半风化岩石发育状况,济阳坳陷不整合结构可划分为Ⅰ型、Ⅱ型和Ⅲ型3种类型,各种不整合结构在地质和测井上具有一定响应特征。不整合结构发育受控于原岩岩性、间断时间、古地形、顶板岩相等因素,这些因素决定了不整合结构类型的空间展布。济阳坳陷砂泥岩地层的风化差异性,使得不整合以遮挡控制圈闭为主,难以形成连续的横向输导层,不是油气长距离运移主通道,但可在局部地区构成垂向或横向输导方式。不整合油气成藏与分布规律可概括为:正向构造背景控制油气的分布与富集,成藏动力控制圈闭含油性,不整合油气藏主要分布在常压系统。地层夹角、层速度和地震波主频是影响地层超剥点(线)准确识别的主要因素,探索形成了以储层超剥线精细描述、不整合面上下岩性有效识别为关键的不整合圈闭精细描述技术。
Based on the analysis of well and seismic data and typical reservoir anatomy, the unconformities of Jiyang Depression are studied. The effect of unconformity on the accumulation of oil and gas is discussed. The unconformities of hydrocarbon accumulation in unconformity trap are clarified. Integration trap fine description method. According to the research, the unconformity structure of the weathered clay layer and the semi-weathered rock can be divided into three types of type I, type II and type III, and the unconformity structures in the Jiyang depression have certain geological and well logging responses feature. The development of unconformity is controlled by the lithology, discontinuity time, palaeogeomorphology and roof slate. These factors determine the spatial distribution of unconformity. The weathering difference of sandstone and mudstone in Jiyang Depression makes it difficult to form a continuous horizontal conduction layer because of the uncontrolled shield control trap. It is not the main channel for long-distance migration of oil and gas. However, it can be vertical or horizontal in some areas Transverse way. Unconformity hydrocarbon accumulation and distribution can be summarized as follows: the positive tectonic setting controls the distribution and enrichment of oil and gas, and the hydrocarbon accumulation control kinematic traps contain oil, and the unconformity oil and gas reservoirs are mainly distributed in atmospheric pressure system. Formation angle, velocity of formation and frequency of seismic waves are the main factors affecting the accurate identification of over-striping (stratigraphy) in the strata, and have been explored to form a detailed description of ultra-striping of reservoirs and effective identification of unconformity above and below the lithosphere as the key unconformity Trapped fine description technique.