浙西志棠剖面下寒武统荷塘组黑色岩系孔隙特征  

Black Rock Series from the Early Cambrian Hetang Formation in Zhitang Section,West Zhejiang Province

作　　者：杨元[1] 张磊[1] 冯庆来[1] 

机构地区：[1]中国地质大学地质过程与矿产资源国家重点实验室,武汉430074

出　　处：《地质科技情报》2012年第6期110-117,共8页Geological Science and Technology Information

基　　金：国家自然科学基金项目(40839903);中国地质调查局项目(1212011220796);国家地质学理科基地人才培养基金项目(J1210043)

摘　　要：以浙西地区志棠剖面下寒武统黑色岩系为研究对象,通过场发射扫描电镜研究,观察、对比了不同岩性样品中孔隙的大小、形态和分布特征。以孔隙形态和成因为基础,将这些孔隙划分为9类:①有机质孔;②沥青孔;③生物孔;④絮凝成因孔;⑤黏土矿间孔;⑥草莓状黄铁矿晶间孔;⑦粒屑孔;⑧矿物溶孔;⑨微裂缝。总结和探讨了孔隙发育特征与岩性的对应关系,并初步分析了志棠剖面荷塘组地层的页岩气地质意义,硅质页岩中孔隙类型多,孔隙发育,在页岩气地质研究中应予以重视。Our research subjects are black rock series from the Early Cambrian Hetang Formation in Zhi- tang section, west Zhejiang. In this research, pore features, including the size, shape and distribution, are described through FEG-SEM scan. On the basis of the shapes and origins of pore, we find eight kinds of pores in the samples. ① organic pore, ② pitch pore, ③biologic pore,④floc-related pore, ⑤ intergranu-lar pore between clay minerals, ⑥ intergranular pore betwen strawberry pyrites, ⑦ intergranular pore be-tween grains, ⑧ mineral dissolution pore, and ⑨ micro-faeture. Furthermore, the relationships between the pore features and reservior cornpositon are discussed and the shale-gas significance of the Hetang For-mation is evaluated in Zhitang section to help the following exploitation of shale-gas.

关 键 词：页岩气 孔隙 黑色岩系 荷塘组 华南 

分 类 号：P588.2[天文地球—岩石学]