论文部分内容阅读
雷一１中亚段在平面上的分布受制于沉积相及成岩相带的展布，构造圈闭隆起幅度小，一般小于１００ｍ，多数在５０ｍ左右。近年来在勘探中，实钻构造结果与地震圈闭误差较大。通过对川中雷一１古圈闭条件的分析，喜山期不同盖层对雷一１中亚段的封盖天然气能力的计算、研究及其演变，得出了不同盖层的封盖临界高度以及直接封盖的致密碳酸盐岩不同厚度时气藏的含气饱和度值，用以判断盖层封盖的有效性。将古圈闭类型和喜山期改造相结合，最后得出结论：第一类古圈闭（构造—成岩—石膏封盖），是寻找雷一１中亚段气藏最有利的区块；第二类古圈闭（构造—岩相—石膏封盖），是寻找雷一１中亚段气藏较有利的地区；第三类古圈闭（古隆起—致密碳酸盐岩直接封盖—石膏层间接遮挡）以产水为主，气藏已遭破坏。
The distribution of the central segment of Lei-1 in the plane is controlled by the distribution of sedimentary facies and diagenetic facies. The amplitude of the structural trap uplift is small, generally less than 100m, most of which is about 50m. In recent years, exploration and drilling, real drilling and seismic trapping structural errors larger. Based on the analysis of Lei-1 paleo-traps in the central Sichuan Basin, the calculation, research and evolution of the capped natural gas capa- bilities of the Lei-1 middle sub-section in the Himalayan capitals were studied. The critical height And the gas saturation value of gas reservoirs with different thicknesses of directly capping dense carbonates to judge the effectiveness of cap capping. The paleo-traps and Himalayan reformations are combined to conclude that the first type of paleo-traps (structural-diagenetic-gypsum capping) The second type of paleo-traps (tectonic-lithofacies-gypsum capping) is a more favorable area to search for the gas reservoirs in the Central Asia section of Lei-1. The third type of ancient traps (Paleo- - Gypsum layer indirectly block) to produce water-based gas reservoir has been destroyed.