中国海相碳酸盐岩层系有机质生烃理论新解

发布时间：2018-05-05 23:42

本文选题：塔里木盆地 + 碳酸盐岩　；参考：《石油勘探与开发》2017年01期

【摘要】：以塔里木盆地海相碳酸盐岩层系为重点,研究烃源岩发育与油气藏之间的关系,探讨中国高热演化程度、低TOC值(小于0.5%)海相碳酸盐岩层系作为烃源岩的可能性及其生烃机理。通过对塔里木盆地烃源岩分布与塔河油田油气藏的匹配关系、烃源岩成烃生物组合及其与油气藏的地球化学特征对比分析,建立海相碳酸盐岩烃源岩成烃物质评价方法。研究得出塔里木盆地塔河油田原油并非来自泥质烃源岩,而具有来源于碳酸盐岩烃源岩的明显特征,进一步揭示高热演化碳酸盐岩中被低估的生烃物质(有机酸盐)及碳酸盐岩中优质成烃生物组合是高热演化碳酸盐岩可以作为烃源岩的关键,有机酸盐具有高温裂解成烃、主体成气和成烃转化率高的生烃特征。塔里木盆地寒武系—中下奥陶统有效碳酸盐岩烃源岩的发育模式以陆棚模式为主。
[Abstract]:In this paper, the relationship between hydrocarbon source rock development and oil and gas reservoirs in Tarim Basin is studied, and the possibility and hydrocarbon generation mechanism of marine carbonate formation with low TOC value (less than 0.5) as source rock are discussed. Based on the matching relationship between hydrocarbon source rock distribution and oil and gas reservoirs in Tahe Oilfield, the hydrocarbon forming biological assemblages of source rocks and their geochemical characteristics with oil and gas reservoirs, a method for evaluating hydrocarbon generation materials of marine carbonate source rocks is established. The results show that the crude oil of Tahe Oilfield in Tarim Basin is not from the argillaceous source rock, but from the carbonate source rock. It is further revealed that the hydrocarbon generating materials (organic acid salts) and the high quality hydrocarbon generation biological assemblages in the carbonate rocks with high thermal evolution are the key to the hydrocarbon source rocks in the high thermal evolution carbonate rocks, and the organic acid salts have the characteristics of pyrolysis hydrocarbon generation at high temperature. The characteristics of hydrocarbon generation with high conversion rate of main gas and hydrocarbon. The active carbonate source rocks of Cambrian-Lower Ordovician in Tarim Basin are mainly developed in continental shelf model.
【作者单位】：中国石化油气成藏重点实验室;中国石化石油勘探开发研究院无锡石油地质研究所;甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室;中国科学院地质与地球物理研究所兰州油气资源研究中心;西南石油大学地球科学与技术学院;中国科学院大学;
【基金】：国家重点基础研究发展计划(973)项目(2012CB214801)
【分类号】：P618.13

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