武隆地区五峰-龙马溪组常压页岩气勘探潜力分析

    The potential of normal-pressureshale gas explorationofWufeng Formation and the lower Silurian Longmaxi Formationin Wulongarea

    • 摘要:   综合四川盆地页岩气勘探开发成果与认识,对武隆地区常压页岩气勘探潜力开展研究,通过钻井、物探和实验分析等资料,揭示武隆地区奥陶系五峰组-志留系龙马溪组下部页岩层各项静态评价指标较优越,具有较好的页岩气勘探潜力。造成武隆地区与焦石坝、南川地区单井产能差异主要是构造作用的影响。结合区域构造演化、地震资料精细解释和构造样式的分析,将武隆地区整体划分为南部凹中隆区、北部斜坡区、中部断展褶皱区和东部地堑区。南部凹中隆区和中部断展褶皱区是页岩气勘探的有利目标。
       

       

      Abstract: Based on the achievements and knowledge of shale gas exploration and development in Sichuan Basin, the potential of normal-pressure shale gas exploration has been studied through drilling, geophysical prospecting and experimental analysis in Wulong area. It is revealed that the static evaluation indexes are superior and have good shale gas exploration potential of the Ordovician Wufeng Formation and the lower Silurian Longmaxi Formation in this area. The difference of single well productivity is mainly due to the influence of tectonics between Wulong, Jiaoshiba and Nanchuan District. Based on regional tectonic evolution, fine interpretation of seismic data and analysis of structural patterns, the Wulong Basin is divided into the southern depression with central uplift region, the northern slope region, the central faulted fold region and the eastern Graben region. The central uplift area in the southern depression and the fault-developed fold area in the central part are favorable targets for shale gas exploration.

       

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