超临界水转化低成熟富有机质页岩生烃特性实验研究  

Experimental Investigation on Hydrocarbon Generation Characteristics of Low Maturity Organic-rich Shale Converted by Supercritical Water

作　　者：谢天 赵秋阳 董宇 巴尔成·巴瓦阿 金辉[1,2] 郭烈锦 XIE Tian;ZHAO Qiuyang;DONG Yu;BAWAA Baercheng;JIN Hui;GUO Liejin(State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Xinjin Weihua Institute of Clean Energy Research,Foshan City 528216,China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049 [2]佛山市南海区鑫锦伟华洁净能源研究院,佛山528216

出　　处：《工程热物理学报》2022年第10期2675-2680,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51888103,No.52006171);中国博士后科学基金(No.2020M683476)。

摘　　要：本文采用非等温加热反应器模拟了低成熟富有机质页岩在400℃、25 MPa超临界水中2∼12 h范围内的生烃过程。结果表明转化后的产物在油气水中均有分布。在2∼12 h范围内,有机碳动用程度随时间的增加逐渐升高,在12 h时可达30%以上。产油率随时间的增加先增后减,在4 h时达到最大值22.11 kg(油)·t^(−1)(页岩)。产气率随时间的增加逐渐升高,在12 h时达到最大值32.88 m^(3)(气)·t^(−1)(页岩)。产油中的饱和烃和芳香烃总含量始终大于80%,随着反应时间的延长,产气中甲烷、乙烷和氢气的选择性增强,水溶性有机物含量先增后减,在反应时长8 h时水TOC达到峰值259.98 mg·L^(−1)。超临界水还能够有效脱除低成熟富有机质页岩中的黄铁矿,并促进页岩内部的介孔和大孔发育。In this paper,a non-isothermal heating reactor was used to simulate the hydrocarbon generation process of low maturity organic-rich shale in the presence of 400℃,25 MPa supercritical water for 2~12 h.The results showed that the products were distributed in oil,gas and water.In the time range of 2~12 h,the utilization of organic carbon increased with the increase of time,and reached more than 30%at 12 h.The oil production rate increased first and then decreased with increasing time and reached a maximum of 22.11 kg(oil)·t^(−1)(shale)at 4 h.The gas production rate increased with increasing time and reached a maximum of 32.88 m^(3)(gas)·t^(−1)(shale)at 12 h.The total relative content of saturated hydrocarbon and aromatic hydrocarbon was always more than 80%.The selectivity of methane,ethane and hydrogen was enhanced with increasing time.The water TOC increased first and then decreased with increasing time and reached the peak of 259.98 mg·L^(−1)at 8 h.Pyrite of low maturity organic-rich shale could be effectively removed and the mesoporous and macropore of shale could be promoted by supercritical water.

关 键 词：富有机质页岩 超临界水 生烃 

分 类 号：TE35[石油与天然气工程—油气田开发工程]