Shale gas accumulation conditions and gas-bearing characteristics of the Lower Cambrian Niutitang Formation in Well Changye-1 in northwestern Hunan Province

作     者：Tuo Lin Shujing Bao Jinchuan Zhang Zhi Zhou Kun Yuan Bo Li Shengyu Yang 

作者机构：Oil and Gas SurveyChina Geological SurveyBeijing 100037China Key Laboratory of Tectonics and Petroleum Resources of Ministry of EducationWuhan 430074China School of Energy ResourcesChina University of GeoscienceBeijing 100083China China Huadian Engineering Co.Ltd.Beijing 100035China 

出 版 物：《Petroleum Research》 (石油研究（英文）)

年 卷 期：2016年第1卷第2期

页      面：205-212页

核心收录：

学科分类：0202[经济学-应用经济学] 02[经济学] 0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 020205[经济学-产业经济学] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0818[工学-地质资源与地质工程] 0816[工学-测绘科学与技术] 

主　　题：shale gas gas-bearing properties Niutitang Formation Well Changye-1 northwestern Hunan 

摘      要：To evaluate the accumulation conditions and gas-bearing properties of shale gas in the Lower Cambrian Niutitang Formation,northwestern Hunan Province,the first shale gas parameter well(Well Changye-1)that takes the Niutitang Formation as the target horizon in the Hunan Province was selected preferably and drilled,cumulatively revealing the thickest dark shale horizon of the Niutitang Formation among the single-well drillings in China,with a true vertical thickness of *** analyzing the core samples in terms of organic geochemistry,rock mineralogy and reservoir properties,the black shale horizons in the Niutitang Formation of Well Changye-1 have high organic carbon content(average 3.9%),moderate maturity(equivalent Ro average 2.6%),high brittle mineral content(quartz content average 50.1%),low clay mineral content(average 32.4%),low porosity(1.7%)and low permeability(1.32×10^(-3)mD),and well-developed meso to micro-pores and fractures,indicating good conditions for shale gas *** desorption and laboratory isothermal adsorption measurements on core samples show that Well Changye-1 has good gas-bearing properties,and gas content generally increases with *** black shale horizons at the depth of 1100-1250m have an average organic carbon content up to 10.1%,total gas content of 0.5-2.1m^(3)/t and 3.7-6.4m^(3)/t,and this is the most favorable depth for shale gas development,indicating that the Niutitang Formation has good a prospect for shale gas *** to huge sedimentary thickness,the black shale in the middle-lower part of the Niutitang Formation should be given priority for exploration.