罗超;刘树根;孙玮;冉波;王世玉;杨迪;白志强;叶玥豪;张旋;邓宾;

• 1:成都理工大学油气藏地质及开发工程国家重点实验室

• 2:陕西延长石油(集团)有限责任公司研究院

摘要(Abstract)：

通过总有机碳质量分数w(TOC)、X线衍射全岩分析和低温氮气吸附实验,获取鄂西—渝东地区牛蹄塘组黑色页岩w(TOC)值、矿物组分、孔体积、比表面积和孔径分布,探讨微观孔隙发育控制因素.结果表明:沉积相控制矿物组分、矿物组分控制孔隙发育,孔隙发育特征反映不同的等温吸附线形态、孔径分布规律、孔体积和比表面积分布频率.浅水陆棚相黑色页岩碳酸盐矿物质量分数较高,石英和黏土质量分数相对较低;深水陆棚相基本不含碳酸盐矿物,石英和黏土质量分数较高;根据等温线和吸附回线特征将黑色页岩分为3类,分别对应碳酸盐矿物质量分数较高的浅水陆棚相黑色页岩、碳酸盐矿物质量分数中等的浅水陆棚相黑色页岩和几乎不含碳酸盐矿物的深水陆棚相黑色页岩;黑色页岩是否含碳酸盐矿物,其孔体积、比表面积和孔径分布区别明显.有机质丰度和矿物组分不同程度控制着鄂西—渝东地区牛蹄塘组黑色页岩微观孔隙发育.石英和黏土质量分数主要控制微观孔隙发育;w(TOC)对孔体积影响不大,但对比表面积有积极作用;碳酸盐矿物质量分数对总孔体积影响不大,但高质量分数碳酸盐矿物有利于宏孔体积增加.另外,碳酸盐矿物质量分数制约着黑色页岩比表面积发育.

关键词(KeyWords)：孔隙结构;黑色页岩;控制因素;氮气吸附;孔径分布;牛蹄塘组

Abstract:

Keywords:

基金项目(Foundation):全国油气资源战略选区调查与评价专项(2009GYXQ15-06);; 国家“973”重点基础研究发展计划项目(2012CB214805)

作者(Author):罗超;刘树根;孙玮;冉波;王世玉;杨迪;白志强;叶玥豪;张旋;邓宾;

Email:

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