梁西文,吴勘,马强分,冯庆来,喻建新

• 1:中石化江汉油田分公司勘探开发研究院
• 2:中国地质调查局武汉地质调查中心
• 3:中国地质大学地球科学学院

摘要(Abstract)：

孔隙是页岩层系是否具有生烃能力、储气能力和开采价值的主要标志。采用场发射扫描电镜对鄂西建始扬子北缘中二叠统孤峰组硅质页岩、泥质灰岩和碳质页岩3类岩石采取二次电子模式扫描,发现并分析了5大类9小类孔隙,即①絮凝作用孔隙;②有机质化石孔;③有机质碎片沥青孔;④黄铁矿粒间孔;⑤矿物颗粒晶间孔;⑥微型通道;⑦微裂缝;⑧钙质化石孔;⑨碎屑与围岩之间孔。研究表明,硅质页岩中发育较多的黄铁矿微球粒以及絮凝结构,有机质孔隙从纳米级至微米级;泥质灰岩中以矿物质孔隙为主,微裂缝比较发育,脆性矿物多;碳质页岩中存在大量蜂窝状孔洞和广泛分布的微裂缝,孔隙类型主要为有机质纳米孔。碳质页岩与传统储层孔隙特征具有很大差异,是页岩气勘探最为有利的岩层。

关键词(KeyWords)： 孤峰组;页岩气;孔隙;空间分布;资源评价

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41272024);; 中国地质调查局项目(1212011220796);; 生物地质与环境地质国家重点实验室自主研究课题项目(GBL11302)

作者(Author): 梁西文,吴勘,马强分,冯庆来,喻建新

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