第30卷
第4期
2016年8月
现代地质 GEOSCIENCE
四川盆地上三叠统须五段页岩微观孔隙
结构及其控制因素
彭建龙12，张金川12，尉鹏飞12，隆帅1,2，黄潇12
黄正林1,2，马玉龙12，张明强1,2
Vol.30
No. 4 Aug, 2016
（1.中国地质大学（北京）能源学院，北京100083；2.中国地质大学页岩气勘查与评价国土资源部重点实验室，北京100083）摘要：为了深入研究四川盆地上三叠统须五段陆相页岩储层微观孔隙结构，运用氢离子抛光扫描电镜（SEM）、低温氮气吸脱附以及相关地球化学分析实验等技术对该地区页岩储层的微观孔隙结构进行了研究，并对控制其纳米孔隙发育的主要因素进行了探讨。结果表明：四川盆地须五段页岩微观孔隙可分为有机孔和无机孔（粒间孔、粒内孔、晶间孔、溶蚀孔），微裂缝可分为构造微裂缝、有机质生排烃缝和成君收缩缝等；孔隙结构类型以两端连通的圆柱孔、平行平面间的缝状孔和呈锥形的管孔为主；微观孔隙孔径分布区间大（1~80mm），峰值主要集中于2~8nm之间；以中孔（2~ 50nm)为主，所占比例为60.21%（或以黏土矿物孔为主，所占比例为44.62%）；页岩的有机质丰度和黏土矿物含量是控制纳米孔隙发育的主要因素。
关键调：四川盆地；上三叠统；须五段；页岩气；孔隙类型；孔隙结构；控制因素
中图分类号：TE132.2
文献标志码：A
文章编号：10008527(2016)04089609
Characteristics and Controlling Factors of Micro-pore Structures of the 5th Shale Member of the Xujiahe Formation of Upper Triassic in Sichuan Basin
PENG Jianlong'-2, ZHANG Jinchuan'-2, WEI Pengfei'-2, LONG Shuai'-2, HUANG Xiao'-2,
HUANG Zhenglin'-2, MA Yulong'-2, ZHANG Mingqiang'-2
(1. School of Energy Resowrees, China Unitersity of Geosciences, Bejing 100083, Chind; 2. Key Laboralory of Shale Gas Exploration and Eraluation, Ministry of Lend and Resouroes, Ching Unitersity of Geasciences, Bejing100083, Chine)
Abstract: To deeply study the micro-pore characteristics of the 5 shale member of the Xujiahe Formation of Upper Triassic in Sichuan Basin, the microscopic pore structures of the shale reservoir were systematically stud-ied by using Argo-ion polishing Scanning Electron Microscope( SEM) , low temperature nitrogen adsorption-de-sorption technology and related geochemical experiments. Meanwhile, the influences on the development of nano-pore were discussed. The studies revealed that the micro-pores in shale can be classified into organic pores, inorganic pores (inter-granular pores, intra-granular, inter-crystalline pores and dissolution pores) and the micro-crack can be classified into structure micro-crack, pressure crack form hydrocarbon generating and ex-pelling, diagenetic constricted crack. What's more, the pore structures can be mainly divided into three kinds, such as cylindrical pore with both ends open, Slit shaped holes between the parallel planes and taper pipe bore. The micro-pore diameters are largely ranged from 1 to 80 nm and the peak is distributed in 2 to 8 nm. The pore volume is mainly composed of meso-pores (2 to 50 nm) with the proportion of 60. 21% (or mainly composed of the pores of clay mineral with the proportion of 44. 62% ). In addition, organic richness and the content of clay minerals are believed to be the main controlling factors of nano-pore development.
收稿日期：2015-05-25；改回日期：2016-01-14；责任编辑：孙义梅。基金项目：国家自然科学基金项目（41102088)。
作者简介：彭建龙，男，硕士研究生，1991年出生，矿产善查与勘探专业，主要从事非营规油气资源评价方面的研究工作。
Email: pjloommon163. com。