复杂构造背景区页岩气富集条件研究——以大巴山前缘地区为例

发布时间：2018-04-25 19:54

  本文选题：富有机质泥岩 + 页岩气富集条件　； 参考：《石油实验地质》2017年04期

【摘要】：通过大巴山前缘地区五峰—龙马溪组富有机质泥岩的野外露头、钻井、岩心等资料的研究,对一系列岩石样品进行了显微薄片、扫描电镜、有机地化、孔渗性、比表面积、含气性解析等多项实验测试分析,对五峰—龙马溪组页岩气的富集条件进行了综合研究。结果表明:大巴山前缘地区富有机质泥岩总体处在浅水—深水陆棚沉积环境下,其沉积厚度在40~70 m左右,平均有机碳含量大于2%;有机质类型为腐泥型Ⅰ型干酪根,有机质成熟度多数为0.82%~3.04%,达到高—过成熟阶段;低渗透—低孔特征,并发育多种微观空隙结构。典型钻井解剖分析认为,页岩气保存条件是该区富集条件中最为关键的因素;未被断裂破坏的箱状背斜是最为有利的构造保存条件。
[Abstract]:Based on the field data of organic mudstone rich in organic matter in Wufeng Longmaxi formation in the front of Dabashan Mountains, a series of rock samples were studied, such as microsheet, scanning electron microscope, organic geochemistry, pore permeability, specific surface area, etc. The accumulation conditions of shale gas in Wufeng-Longmaxi formation were studied. The results show that the organic mudstone in the front of the Dabashan Mountains is generally in the shallow water and deep water shelf sedimentary environment, its deposition thickness is about 4070 m, the average organic carbon content is more than 2 parts, and the organic matter type is sapropelic type 鈪，

本文编号：1802720