上扬子西北缘宁强湾牛蹄塘组有机地球化学特征

发布时间：2018-01-08 22:10

  本文关键词：上扬子西北缘宁强湾牛蹄塘组有机地球化学特征　出处：《岩性油气藏》2017年01期 　论文类型：期刊论文

  更多相关文章： 富有机质泥页岩 有机地球化学 牛蹄塘组 上扬子西北缘

【摘要】：上扬子西北缘宁强湾牛蹄塘组富有机质泥页岩极其发育,具备油气生成条件,但尚未对其开展页岩气调查与评价。通过野外露头测量和样品有机地球化学分析测试,查明了研究区牛蹄塘组泥页岩发育厚度、分布特征、沉积环境及有机地球化学特征。结果表明:富有机质泥页岩累计厚度最大可达108.5 m;TOC质量分数为0.08%~7.54%,平均为1.97%;有机质类型为Ⅰ型;T_(max)为419~496℃,平均为448℃;Ro平均为2.36%,烃源岩已进入成熟—过成熟演化阶段。研究区烃源岩受宁强湾古地理控制,西侧烃源岩生烃条件明显优于东侧,前者具有良好的页岩气勘探前景。
[Abstract]:The mudstone shale rich in organic matter in Ningqiangwan Niutetang formation on the northwest margin of Upper Yangtze is extremely developed and has the conditions for oil and gas generation. But the shale gas investigation and evaluation have not been carried out. Through outcrop survey and organic geochemical analysis of samples, the thickness and distribution of shale in Niutetang formation have been found out. Sedimentary environment and organic geochemical characteristics. The results show that the maximum accumulative thickness of organic shale is 108.5 m; The mass fraction of TOC was 0.08 and 7.54, with an average of 1.97. The type of organic matter is type 鈪，

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