摘要
为了定量表征泥页岩储层吸附气的能力,选取黔南坳陷黄页1井牛蹄塘组泥页岩样品为研究对象.在泥页岩样品有机碳分析、X衍射全岩分析和等温吸附实验的基础上,建立泥页岩储层有机质、黏土矿物和其它矿物等3种组分吸附气评价模型.通过计算有机质、黏土矿物和其它矿物吸附气的能力,定量评价泥页岩储层吸附气能力.研究结果表明:黔南坳陷下寒武统牛蹄塘组下部泥页岩中有机质、黏土矿物和其它矿物吸附气能力分别为36.98m3/t,3.05m3/t和0.35m3/t,它们吸附气能力各相差10倍左右;该模型可以计算埋深相近的同一套泥页岩储层中有机质、黏土矿物和其它矿物等3种组分对页岩气的吸附能力,进而定量评价泥页岩储层吸附气能力.
In order to quantitatively evaluate the gas adsorption capacity of shale reservoir, the Niuti- tang formaiton in Qiannan depression was selected as a case study. Based on the organic carbon analy- sis, quantitative X-ray diffraction and isothermal adsorption experiment, the evaluation model of gas adsorption capacity of shale was established. It was supposed that there were mainly three components in shale reservoir to adsorb gas, which are organic matter, clay minerals and other minerals. By calcu- lating the gas adsorption capacities of organic matter, clay minerals and other minerals in shale sam- pies, the gas adsorption capacity of the shale reservoir was evaluated quantitatively. The results show that the gas adsorption capacities of organic matter, clay minerals and other minerals are 36.98 m^3/t, 3.05 m^3/t and 0.35 m^3/t in the organic-rich shale of Lower Cambrian Niutitang formation in Qiannan depression, respectively. The gas adsorption capacities have the difference of about ten times among the three components. On basis of the model, the gas adsorption capacities of organic matter, clay minerals and other minerals in the same shale reservoirs with similar buried depths can be calculated, and then the gas adsorption capacity of shale reservoir can be evaluated quantitatively.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2015年第3期508-513,共6页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(41302101
41330313)
国家重大科技专项(2011ZX05007-001)
关键词
黔南坳陷
牛蹄塘组
泥页岩
吸附
Qiannan depression
Niutiang formation
shale
adsorption
