浙江临安地区下寒武统荷塘组页岩气地质条件与勘探前景  

Shale-gas geological conditions and exploration prospect of Hetang formation in Lin'an,Zhejiang Province

作　　者：刘章平[1] 王俊涛[2] 周存亭[2] 耿晓光[2] 王松[2] 

机构地区：[1]安徽省地质矿产勘查局332地质队,安徽黄山245000 [2]安徽省地质调查院,安徽合肥230001

出　　处：《合肥工业大学学报（自然科学版）》2016年第6期842-848,共7页Journal of Hefei University of Technology：Natural Science

基　　金：中国地质调查局地质调查资助项目(12120114019801);安徽省地质矿产勘查局科技资助项目(KJ2012-01)

摘　　要：通过野外实地观察、样品采集及系列实验分析发现，浙江临安地区下寒武统荷塘组页岩在研究区分布广泛，沉积厚度大（约150～300 m ），有机质丰度高（wTOC 为0．22％～13．56％），热演化程度较高（Ro 为3．23％～5．22％），达过成熟阶段，满足页岩气富集条件；储存孔隙以微孔为主，面孔率小于1％，微细孔隙不发育，等温吸附实验测得吸附质量体积为0．88～4．97 m3／t ，平均为3．05 m3／t ，表明研究区页岩具有较强的吸附能力。同时研究认为，后期改造相对较弱的地区应该是该区页岩气勘探开发的有利区。Based on the field observation ,sampling and lab analysis ,it is found that the shale sediment of the Hetang formation of Lower Cambrian in Lower Yangtze region of West Zhejiang Province is widely distributed in the Lin ’ an area , and possesses better hydrocarbon potential . The sediment thickness is 150-300 m ,organic carbon content wTOC is 0 .22% -13 .56% ,and thermal evolution degree Ro is 3 .23% -5 .22% .The reservoir pores are small ,poorly developed and less than 1% .The result of isothermal adsorption experiment shows that the shale in study area has strong adsorption ability of gas ,and the adsorbed gas can reach 0 .88-4 .97 m 3 /t ,averaging 3 .05 m 3 /t .The area with weak tec-tonics deformation and structural destruction should have great potential of shale-gas resource ,and be priority of shale-gas exploration and development in the Lin’an area .

关 键 词：页岩气 浙江临安 荷塘组 地质条件 

分 类 号：P618.130.2[天文地球—矿床学]