| 南海中南部区域储层分布规律及油气成藏模式 |
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| 引用本文： | 王龙,赵志刚,谢晓军,刘世翔,郭佳,宋双,王一博,唐武,孙瑞.南海中南部区域储层分布规律及油气成藏模式[J].地球科学,2019,44(3):919-928. |
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| 作者姓名： | 王龙 赵志刚 谢晓军 刘世翔 郭佳 宋双 王一博 唐武 孙瑞 |
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| 作者单位： | 中海油研究总院有限责任公司, 北京 100028 |
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| 基金项目： | 国家科技重大专项2016ZX050国家自然科学基金项目91528303 |
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| 摘 要： | 目前鲜有以南海中南部区域作为整体开展油气成藏模式研究.在前人研究基础上，结合构造演化、烃源岩研究，重点分析了油气分布特征，解剖了大中型油气田，开展了南海中南部区域碎屑岩储层和碳酸盐岩储层分布规律及油气成藏模式的系统研究.碎屑岩储层主要分布于万安盆地西侧、曾母盆地南侧和文莱-沙巴盆地，渐新世至上新世自南海中南部西南缘-南缘-东南缘主力碎屑岩储层分布层位逐渐变新；碳酸盐岩储层主要分布于万安盆地东部、曾母盆地中北部、礼乐盆地和巴拉望盆地.南海中南部区域迄今发现的54个特大型-大型油气田中，有碎屑岩油气田32个，碳酸盐岩油气田22个，储量合计为46.7×108 t，占油气总储量的81%.依据烃源岩特征、储层分布特点及典型油气田的成藏规律认识，将南海中南部的成藏模式分为3类:自生自储、砂岩储层富油为主、早期成藏；下生上储、碳酸盐岩储层富气为主、晚期成藏；自生自储、砂岩储层内油气并存、晚期成藏.
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| 关 键 词： | 南海中南部 大中型油气田 储层 成藏模式 石油地质 |
| 收稿时间： | 2018-09-15 |
Reservoir Distribution and Hydrocarbon Accumulation Patterns in Central-Southern South China Sea |
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| Abstract: | Few of researchers take the central-southern South China Sea (SCS) as a whole to study the oil and gas accumulation model.The hydrocarbon distribution features and accumulation models of both clastic reservoirs and carbonate reservoirs in central-southern SCS have been studied, based on both the previous research but also comprehensive analyses of tectonic evolution, source rock and key oil and gas field analysis.The results indicate that clastic reservoirs are mainly distributed in western Wan'an Basin, southern Zengmu Basin and Brunei-Sabah Basin.Carbonate reservoirs are mainly distributed in eastern Wan'an Basin, central-northern Zengmu Basin, Liyue Basin and Palawan Basin.There are 54 giant-supergiant oil and gas fields in central-southern SCS, among which 32 are clastic reservoirs while others are carbonate reservoirs.Reserves of these 54 fields are 4.67 billion tons, accounting for 81% of the total reserves of the whole area.Based on the characteristic analysis of source rocks, reservoirs and hydrocarbon accumulation of the key oil and gas fields, there are 3 kinds of accumulation patterns, and their features are as follows:source and reservoir in same layer, oil-rich clastic reservoirs, early-stage accumulation; lower-source and upper-reservoirs; gas-rich carbonate reservoirs, late-stage accumulation; source and reservoirs in same layer, oil and gas-rich clastic reservoirs, and late-stage accumulation. |
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