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| 准噶尔盆地上三叠统泥页岩解析气特征 | |
| 引用本文： | 高岗,柳广弟,王绪龙,张越千,孔玉华,张道旻,高劲.准噶尔盆地上三叠统泥页岩解析气特征[J].天然气地球科学,2013,24(6):1284-1289. |
| 作者姓名： | 高岗 柳广弟 王绪龙 张越千 孔玉华 张道旻 高劲 |
| 作者单位： | 1.中国石油大学油气资源与探测国家重点实验室，北京 102249； 2.中国石油新疆油田分公司，新疆 克拉玛依 834000 |
| 基金项目： | 全国油气资源战略选区调查与评价专项“西北区页岩气资源调查评价与选区”子项目(编号:14B12XQ150903)资助. |
| 摘 要： | 在准噶尔盆地上三叠统泥页岩地质与有机地球化学特征分析基础上，对准噶尔盆地达9井上三叠统泥页岩岩心含气量进行了测定，分析了页岩气的成分组成与碳同位素特征。泥页岩中有一定的含气量，主要在0.18～0.24m 3/t之间，气体成分以烃类气体为主，二氧化碳、氮气等非烃气体含量较低。甲烷为烃类气体的主要成分，重烃含量较低，相同分子量的异构烷烃占优势，烃类气体具干气特征。非烃气体中的氮气含量明显高于二氧化碳。烃类气体碳同位素值较低，显示出常规低成熟原地腐泥型天然气特征，这种特征可能与短时间解析和烃源岩演化程度有关，具体原因有待进一步深入研究。 |
| 关 键 词： | 页岩气 上三叠统 解析气 准噶尔盆地 |
| 收稿时间： | 2013-01-30 |
Characteristics of Separated Shale Gas from the Upper Triassic of Junggar Basin |
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| Affiliation: | 1.State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum(Beijing), Beijing 102249, China; 2.Xinjiang Oilfield Company, CNPC,Karamay 834000, China |
| Abstract: | Based on the geological and organic geochemical features of the Upper Triassic mudstone in Junggar Basin,mudstone core gas content of the Upper Triassic in the well Da 9 wad determined,as well as the molecular composition and carbon isotopes of the gaseous hydrocarbons.Mudstone has some content of gas,mainly 0.18-0.24m3/t.The gas is dominated by alkane gas,with low level of nonhydrocarbon such as CO2 and N2,etc.The alkane gas is dominated by methane with low content of heavy hydrocarbon,indicating dry gas.For hydrocarbons with same molecular weight,isoparaffin is more predominant than normal paraffin.Among the nonhydrocarbon,nitrogen has apparently higher content than CO2.Alkane gas has relatively low carbon isotopes,demonstrating features of low-mature sapropel-type natural gas in place which might be related to short time desorption and lower maturity of source rock etc. |
| Keywords: | Shale gas Upper Triassic Separating gas Junggar Basin |
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