川中地区寒武系龙王庙组沥青成因与油气成藏史

发布时间：2018-04-13 22:10

本文选题：沥青形态 + 沥青成因　；参考：《石油学报》2017年08期

【摘要】：运用有机岩石学、有机地球化学和扫描电镜等方法和技术,深入研究了川中地区寒武系龙王庙组中高演化沥青的成因类型、形成期次和来源;并在此基础上,结合包裹体及构造演化特征等,恢复了安岳气田龙王庙组气藏的成藏史。结果表明:(1)川中地区龙王庙组储层中沥青均来自于下寒武统烃源岩,沥青成因类型多样,以热裂解成因为主;(2)沥青的形成分为3个阶段,第1阶段为氧化水洗型沥青的形成,第2阶段为沉淀型沥青的形成,第3阶段为热裂解成因沥青的形成;(3)安岳气田龙王庙组气藏先后经历了5期的油气充注,包括2期液态烃的充注、晚三叠世—早侏罗世干酪根裂解气的充注、晚侏罗世—早白垩世原油裂解气的充注以及喜马拉雅期圈闭改造调整阶段干气的充注。
[Abstract]:With the methods and techniques of organic petrology, organic geochemistry and scanning electron microscope, the genetic types, forming stages and sources of the middle and high evolution bitumen of Cambrian Longwangmiao formation in central Sichuan are studied, and on the basis of these,The accumulation history of Longwangmiao formation gas reservoir in Anyue gas field is restored by combining the inclusions and structural evolution characteristics.The results show that the bitumen in the reservoir of Longwangmiao formation in central Sichuan is derived from the lower Cambrian source rock, and the formation of bitumen is divided into three stages, the first stage is the formation of oxidized water-washed asphalt, and the formation of bitumen is mainly caused by pyrolysis.The second stage is the formation of precipitated asphalt, and the third stage is the formation of pyrolytic bitumen. The gas reservoir of Longwangmiao formation in Anyue gas field has undergone five stages of oil and gas filling, including the second stage of liquid hydrocarbon filling.The filling of kerogen cracking gas from late Triassic to early Jurassic, oil cracking gas from late Jurassic to early Cretaceous and dry gas from the adjustment stage of Himalayan trap transformation.
【作者单位】：中国石油勘探开发研究院西北分院;中国石油勘探开发研究院;中国石油化工股份有限公司石油勘探开发研究院;
【基金】：国家重大科技专项(2011ZX05004-001)资助
【分类号】：P618.13

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