改造盆地研究和油气评价的思路

THINKING FOR RESEARCHES AND OIL-GAS ASSESSMENT OF REFORMED BASINS

刘池洋 杨兴科

Liu Chiyang Yang Xingke

改造盆地在我国分布广、数量多,为未来油气资源的主要接替区。这由中国大陆结构复杂、活动性强等基本特征所决定。油气的聚散、成藏和分布既严格受成盆期和成盆期前构造格局的控制,又明显受成盆期后每一次构造运动和任一种改造形式的影响,因而油气成藏过程复杂、分布规律多变,研究和勘探难度颇大。改造盆地研究与评价的思路和程式为 :(1)厘定盆地属性,分析动力环境;(2)恢复原始盆地,回归今盆位置;(3)揭示改造过程,明确几个时期;(4)确定改造程度,划分保存单元;(5)探讨聚散特点,评价资源规模;(6)重视多源油气,突破单一模式;(7)多期动态聚散,突出晚期成藏;(8)注意差异改造,切忌以点代面。

Reformed basins that are widely and numerously found in China are the main replacing areas for China's oil and gas exploration.Oil and gas generation,accumulation,migration,pool-forming and distribution in the reformed basins were controlled by both the tectonic framework of pre-basin stage and the tectonic movements and structural forms of post-basin stage.So oil and gas pool-forming processes were complicated and oil-gas distribution regularity was varied.The process or thinking for the researches and oil-gas assessment of the reformed basins includes:1.collating the attribution of the basin and analysing its dynamic circumstances;2.reverting to the original basin;3.revealing the reformation process of the basin;4.determining the reformation degree and classifying the basin's retention units;5.approaching the characteristics of oil and gas accumulation and dispersion,assessing resources amount;6.taking multi-source hydrocarbon into account;7.paying more attention to late-stage pool-forming;8.paying attention to differential reformation.

10.11743/ogg20000103