SEVERAL PROBLEMS ON OIL AND GAS PRESERVATION AND THEIR COMMERCIAL PROSPECTING IN MARINE SEQUENCES OF SOUTH CHINA
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摘要: 南方海相油气保存条件研究中应该高度重视以下几个方面:a)避免被古油气藏牵着鼻子走,把着眼点从盆地边缘的背斜带高大构造以及断凹间隆升断块中寻找大油气田的思路中解放出来;b)油气地质,尤其是保存条件,具有明显的分割性;c)利用水文地质特征准确评价油气保存条件;d)深入研究沉积—埋藏和有机质热演化历史以及油气的生成、运移、聚集过程,分析油气分布规律.在重视大区域研究的基础上,已经有条件把研究和勘探的重点放在南北两个前陆盆地带上,以解决油气勘探中遇到的问题为核心,采用新思路、新方法、新理论,有针对性地开展研究工作,缩小包围圈,尽快找到有利于油气成藏、保存的地区,直接指导生产.Abstract: Several problems in the study of oil and gas preservation and their commercial potential in marine sequences of South China should include as follows:(1) Areas near the ancient petroleum pools,the large and high anticlines at the edge of basins and the uplifted blocks between sags are not ideal locations for discovery of large oilfield in South China;(2) Conditions of petroleum preservation were very complicated;(3) The properties of hydrogeology could be used to evaluate the preservation condition;and (4) The sedimentation,burial history and geothermal evolution should be studied in detail,and the hydrocarbon generation,migration and accumulation should be analyzed in accordance with its geological settings.On basis of study of regional tectonics,special concerns should be put in the two foreland basins located in the north and south respectively.
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Key words:
- petroleum exploration /
- hydrocarbon preservation /
- marine sequence /
- hydrogeology /
- South China
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