东南亚地区裂谷作用对油气成藏组合的控制

东南亚地区发育100多个新生代沉积盆地，这些沉积盆地经历了不同程度的裂谷作用。为了指导东南亚油气勘探，通过对盆地构造-沉积演化进行分析，系统研究了东南亚地区盆地油气成藏组合的要素特征，并探讨了裂谷作用对油气成藏组合的影响。研究结果认为：东南亚地区盆地构造-沉积演化经历了同生裂谷早期、同生裂谷晚期、后裂谷早期和后裂谷晚期4个裂谷作用阶段。根据裂谷作用阶段和在相应裂谷作用阶段形成的储层类型，从深到浅划分出4套油气成藏组合：深部成藏组合、下部成藏组合、中部成藏组合和上部成藏组合。深部成藏组合发育同生裂谷早期湖相浊积砂岩、湖相冲积扇储层，下部成藏组合发育同生裂谷晚期海进时期河流-三角洲砂岩储层，中部成藏组合发育后裂谷早期海相碳酸盐岩储层，上部成藏组合发育后裂谷晚期海退时期河流-三角洲砂岩储层。其中，中部成藏组合发育的后裂谷早期海相碳酸盐岩储层勘探潜力最大。

Control of rifting on hydrocarbon plays in Southeast Asia

There are more than 100 Cenozoic sedimentary basins developed in Southeast Asia region, and these basins are undergone widespread rifting. To provide guidelines to hydrocarbon exploration in SE Asia, through analysis of the tectonic-sedimentary evolution of the basins, this research on hydrocarbon elements characteristics of the petroleum plays in the SE Asian basins was conducted, and the control of rifting on petroleum plays was discussed. Results show that the tectonic-sedimentary evolution of the basins in SE Asia undergone he early syn-rifting, the late syn-rifting, the early post-rifting and the late post-rifting. According to the rifting stages and reservoir lithofacies, the hydrocarbon plays of basins in SE Asia can be grouped into four different assemblages, i.e., the deeper, the lower, the middle, and upper ones. The deeper plays feature in the early syn-rifting lacustrine turbidites and alluvial fans reservoirs; the lower plays feature in the late syn-rifting transgressive fluvial-deltaic sandstone reservoir; the middle plays feature in the early post-rifting carbonate reservoir; and the upper plays feature in the late post-rifting regressive fluvial-deltaic sandstone reservoir. Among them, the middle plays develop the early post-rifting carbonate reservoir has the most promising exploration potential.