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ANALYSIS ON THE UPINTRUSION OF THERMAL FLUID AND THE MIGRATION AND ACCUMULATION RULES OF NATURAL GAS AND CO2 IN THE MUD DIAPIRS OF THE YINGGEHAI BASIN
Author(s): 
Pages: 349-358
Year: Issue:  4
Journal: PETROLEUM GEOLOGY & EXPERIMENT

Keyword:  泥底辟热流体盆地热场特征天然气运聚特点控制因素分析莺歌海盆地;
Abstract: 莺歌海盆地属南海北部被动大陆边缘新生代高热盆地,其高地温场及高大地热流主要集中于盆地中部莺歌海坳陷泥底辟构造带,因此泥底辟热流体上侵活动,尤其是晚期泥底辟热流体活动控制了天然气及CO2的运聚富集规律.同时,由于热流体分区、分块与分层的局部性侵入,导致了壳源型CO2及烃类气运聚富集的差异性和分区、分块与分层的局部富集特点.总之,泥底辟热流体上侵活动是控制天然气及CO2运聚成藏的主控因素.根据CO2与烃类气的地化特征及其控制因素,可以分析和预测其运聚规律,为天然气勘探提供决策依据.
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