摘要
本文扼要地阐述了近几年在中国上、下扬子地区海相碳酸盐岩区开展油气资源普查的地质、地球物理研究所取得的重大成果。扬子地区的地形、地表和地下地质构造条件十分复杂,古生界内部构造的普查和详探,非构造油气藏的寻找,以及区域含油气远景和选区划分,由于勘查技术上没有很好过关,使古生界油气资源勘查进展缓慢。有关单位研究了山区二维地震剖面、山区三维地震面积测量、宽线地震剖面、CAD山区定线地震剖面、重力、大地电磁法等等。拟定了若干套适合上、下扬子地区不同条件下应用的普查、详查的野处数据采集系统及地震资料的处理和解释系统,初步应用后取得了很好的地质成果。文中着重阐述了抓科技攻关、促油气勘查的中心思想,提出要抓改革、用改革、促科技。
Abstract
In this paper, the important achievements gained from geologic-geophysical research in the reconnaissance survey of oil/gas reservoirs of marine carbonate rocks, which has been conducted in recent years in upper and lower reaches of the Yangtze River, are briefly introduced and described. The terrain, the surface and substructure conditions of these regions are very complicated.Owing to the problems of the exploration technique had not yet been solved thoroughly,hence, the progress of the prospecting for oil/gas reservoirs of the Palaeozoic formations, such as the reconnaissence and detailed surveys of the structures within the Palaeozoic formations,the finding of non-structural oil/gas reservoir as well as the division and selection of the regional prospective oil/gas areas,proceeded rather slowly.After the carefull comparision of the 2-D seismic section, the data of 3-D seismic survey in mountainous regions, the data by wide-line profiling in mountain-area,the data by CAD wide-line profrling in mountain-area,the data of gravitational and magnetote-lluic surveys,several layouts with respect to the data acquisition,processing as well as interpretation suitable for the reconnaissence and detailed surveys of the above-mentioned areas were worked out. Good geological results have been obtained after putting them into practice. The central idea of "grasping and solving the key tasks in science and technology, promoting the oil/gas exploration" is described in detail.
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