OALib Journal期刊
ISSN: 2333-9721
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湘西北地区花垣页岩气区块勘探潜力
Keywords: 地质特征,页岩气,牛蹄塘组,花垣区块,湘西北地区,上扬子地台
Abstract:
?上扬子地台页岩气资源丰富,特别是牛蹄塘组勘探潜力巨大。花垣页岩气区块位于上扬子地台牛蹄塘组主要页岩气富集区,其页岩气勘探潜力亟待深入发掘和准确评价。运用地层对比、储层分析和烃源岩地球化学分析等手段,结合前人研究成果,对花垣页岩气区块的构造、储层和烃源岩特征进行了系统研究。厘定了牛蹄塘组的分布范围、储层物性、烃源岩厚度等参数及其分布特征,结合渝科1井和岑页1井的含气量测试结果,进一步计算了区块资源量。花垣页岩气区块牛蹄塘组的有机质类型主要为ⅰ型和ⅱ1型;烃源岩有机质含量高,其平均值为3.52%;镜质体反射率平均值为3.58%,达到成熟晚期阶段;储层具有低孔—超低渗、高比表面积的特征;区块的可采资源量达31.87×108m3。花垣页岩气区块具备了较好的烃源岩、储层及埋藏条件,可采资源量大,可以优选区块中上部的民乐至龙寨一线进行下一步的勘探和评价工作。
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