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石油实验地质  2018, Vol. 40 Issue (3): 454-460    DOI: 10.11781/sysydz201803454
方法·技术 本期目录 | 过刊浏览 |
鄂尔多斯盆地山西组低成熟度页岩生烃热模拟
高栋臣, 郭超, 姜呈馥, 张丽霞, 王晖, 史鹏, 陈奕奕
陕西延长石油(集团)有限责任公司研究院, 西安 710075
Hydrocarbon generation simulation of low-maturity shale in Shanxi Formation, Ordos Basin
GAO Dongchen, GUO Chao, JIANG Chengfu, ZHANG Lixia, WANG Hui, SHI Peng, CHEN Yiyi
Research Institute of Shaanxi Yanchang Petroleum(Group) Co., Ltd, Xi'an, Shaanxi 710075, China
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摘要: 为查明鄂尔多斯盆地古生界二叠系山西组页岩生烃过程中产物的变化规律及影响因素,揭示页岩生烃潜力,选取了鄂尔多斯盆地东缘山西组地层低成熟度富有机质页岩样品,采用密封黄金管—高压釜体系,在50 MPa围压下,以20℃/h和2℃/h的升温速率进行生烃热模拟实验,测定气态烃和液态烃的产量及气态烃的碳同位素组成,分析不同升温速率下实验产物的演化规律,探讨碳同位素特征及成因,并建立了山西组页岩生烃模式。研究表明:(1)相对低的升温速率有利于烃类气体的生成;(2)相对低的升温速率下,液态烃产率和最大产率对应的温度都较低;(3)温度对热解气碳同位素有明显影响,而升温速率对热解气碳同位素并无明显影响。建立了鄂尔多斯盆地山西组页岩生烃模式。生烃热模拟结果显示鄂尔多斯盆地山西组页岩生烃潜力较好。
关键词 页岩热模拟升温速率碳同位素生烃模式山西组鄂尔多斯盆地    
Abstract:Low-maturity organic-rich shale from the Paleozoic Shanxi Formation in the eastern margin of Ordos Basin was chosen for pyrolysis simulation in order to find out hydrocarbon generation laws and its influencing factors, and to reveal the hydrocarbon generation potential of shale. A pyrolysis system of sealed gold tubes in high pressure vessels was employed to conduct pyrolysis experiments at two heating rates of 20℃/h and 2℃/h under a constant confining pressure of 50 MPa. The yields of gaseous hydrocarbons and liquid hydrocarbons, and the carbon isotopic compositions of gaseous hydrocarbons were measured. The experimental products at different heating rates were analyzed, the carbon isotope characteristics and genesis were discussed, and a hydrocarbon generation model of Shanxi group was established. The research demonstrated that (1) the relatively low heating rate was favorable for the generation of hydrocarbon gas; (2) at the relatively low heating rate, both yield of liquid hydrocarbon and temperature of maximum yield were low; (3) the temperature had a significant effect on the carbon isotope of pyrolysis gas. However, the effect of heating rate on the carbon isotope of pyrolysis gas was not obvious. A shale hydrocarbon generation model was established according to the thermal simulation experiment. The results of hydrocarbon generation simulation indicated that the shale in the Shanxi Formation in the Ordos Basin had a good potential of hydrocarbon generation.
Key wordsshale    thermal simulation    heating rate    carbon isotope    hydrocarbon generation model    Shanxi Formation    Ordos Basin
收稿日期: 2017-08-28      出版日期: 2018-05-24
ZTFLH:  TE122.11  
基金资助:国家科技重大专项“延安地区陆相页岩气勘探开发关键技术”(2017ZX05039)和陕西延长石油集团科技计划“延长探区陆相页岩油气资源评价与富集区预测”(ycsy2017ky-A-20-3)共同资助。
作者简介: 高栋臣(1983-),男,工程师,从事非常规油气地质研究。E-mail:308966926@qq.com。
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引用本文:

高栋臣, 郭超, 姜呈馥,等 .鄂尔多斯盆地山西组低成熟度页岩生烃热模拟[J].石油实验地质,2018,40(3):454-460.
GAO Dongchen, GUO Chao, JIANG Chengfu,et al .Hydrocarbon generation simulation of low-maturity shale in Shanxi Formation, Ordos Basin[J].Petroleum Geology & Experiment,2018,40(3):454-460.

链接本文:

http://www.sysydz.net/CN/10.11781/sysydz201803454      或      http://www.sysydz.net/CN/Y2018/V40/I3/454

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