摘要
为了有效地开展湘中拗陷和湘东南拗陷海相、海陆过渡相的高成熟度富有机质泥页岩储层特征研究,作者利用泥页岩黏土矿物X射线衍射、场发射环境电镜扫描、薄片鉴定、比表面积测试等方法,证实了该区泥页岩的主要矿物组分为石英、黏土矿物及碳酸盐矿物。其中脆性矿物的质量分数达57%,岩石类型以深灰色泥岩、灰黑色页岩、深灰色灰质泥岩为主。泥页岩储层主要储集空间类型为格架孔、溶蚀孔、有机质孔、生物体腔孔和微裂缝等,孔喉分选较好,有利于页岩气在其中渗流。总体上认为湘中拗陷和湘东南拗陷上古生界泥页岩层系具有良好的页岩气储集条件。
In order to effectively carry out the reservoir characteristics research on the high maturity and organic matter-rich shale of the marine and transitional facies in the Xiangzhong depression and Xiangdongnan depression,by using X-ray diffraction analysis,field emission scanning electron microscopy,thin sections identification,and specific surface area testing of clay minerals,the authors confirm that the main minerals in the shale are quartz,clay minerals and carbonate minerals.Among them,brittle minerals account for 57％ of the total,the rock types are mainly dark grey mudstone,grey and black shale and dark grey lime mudstone.They also reveal that the main reservoir space types are frame pores,dissolution pores,organic matter pores,organism cavities and micro-fractures.Moreover,the well-sorted pore throats benefit the shale gas to move in the reservoir.On the whole,it is generally accepted that there are good reservoir conditions for the shale gas of the Upper Paleozoic shale formations in the Xiangzhong depression and Xiangdongnan depression in Hunan.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第1期45-54,共10页
Journal of Chengdu University of Technology: Science & Technology Edition
基金
国土资源部油气专项(2009GYXQ15-06)
关键词
湘中拗陷
湘东南拗陷
页岩气
储集空间
储层特征
Xiangzhong depression
Xiangdongnan depression
shale gas
reservoir space
reservoir characteristics
