摘要
以我国四川盆地上三叠统须家河组页岩为重点研究对象,在大量岩心、露头样品分析化验基础上,开展陆相页岩储层孔隙特征研究。采用高压压汞法、液氮吸附法、脉冲式渗透率法等多种手段相结合测定页岩储集物性,表明须家河组具有一定的储集性能,孔隙度为0.95%~4.77%,平均为2.73%。运用岩心观察、薄片观察、场发射扫描电镜等直接观察手段与高压压汞、氮气等温吸附等实验系统研究须家河组页岩的储集空间特征,明确纳米级基质孔隙是须家河组储集空间的主体,包括原生残余孔、颗粒间孔、溶蚀孔和有机质孔,孔径2~100nm,〈50nm的孔隙占83.9%,有机质孔隙局部发育。影响须家河组页岩储层特征的主要控制因素包括TOC含量、黏土矿物含量以及有机质热演化程度。
Based on drilling data,outcrop geologic survey around the area and laboratory test results of lots of rock samples,reservoir characteristics of Triassic Xujiahe Formation shale in the Sichuan basin are analyzed.Physical properties of the shale reservoir were tested by high pressure mercury intrusion method,nitrogen isothermal adsorption,and pulse permeability method.It is thought that Xujiahe Formation shale has a center of reservoir performance,and the porosity ranges from 0.95%to 4.77% with an average of 2.73%.A series of methods including direct observation method such as core and thin section observation,field emission scanning electron microscopy（FSEM）in combination with high-pressure mercury injection,nitrogen isothermal adsorption experiment research have been used to research the reservoir space characteristics of Xujiahe Formation.Nanoscale matrix pore is the dominant reservoir space in the Xujiahe Formation shale,and pore with size less than 50 nm accounted for 83.9%.Matrix pores with pore size of 2-100 nm include residual primary pores,intergranular pores,dissolved pores,and organic pores that only developed in local parts.It＇s pointed out that TOC content,clay mineral content and thermal maturity were the main controlling factors on reservoir characteristics of Xujiahe Formation shale.
出处
《地学前缘》
EI
CAS
CSCD
北大核心
2016年第2期158-166,共9页
Earth Science Frontiers
基金
国家油气重大专项"页岩气重点地区资源评价"(2011ZX05018-001)
国家重点基础研究发展计划"973"项目(2013CB228001)
关键词
陆相页岩
须家河组
孔隙特征
有机质孔
比表面积
孔径分布
continental shale
Xujiahe Formation
porosity characteristics
organic matter pore
surface area
porosity distribution
作者简介
黄金亮（1983-），男，博士，工程师，从事非常规油气地质评价、勘探规划与战略方面研究工作。E-mail：huangj11983@petrochina．com.cn
通讯作者：董大忠，男，教授级高级工程师，主要从事油气资源与发展战略、非常规油气资源地质勘探与开发等方面的研究工作。E-mail：ddz@petrochina．com．cn
