| 塔里木盆地原油金刚烷含量校正及裂解程度评价 |
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| 引用本文： | 王道伟,蔡春芳,彭燕燕,孙鹏,戚宇,刘景彦,蒋子文.塔里木盆地原油金刚烷含量校正及裂解程度评价[J].地球化学,2022,51(1):58-69. |
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| 作者姓名： | 王道伟 蔡春芳 彭燕燕 孙鹏 戚宇 刘景彦 蒋子文 |
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| 作者单位： | 中国地质大学(北京) 能源学院, 北京 100083;中国科学院 地质与地球物理研究所 新生代地质与环境院重点实验室, 北京 100029;中国科学院 地质与地球物理研究所 新生代地质与环境院重点实验室, 北京 100029;中国科学院大学 地球与行星科学学院, 北京 100049;中国科学院 地质与地球物理研究所 新生代地质与环境院重点实验室, 北京 100029;长江大学 石油工程学院, 湖北 武汉430100;中国地质大学(北京) 能源学院, 北京 100083 |
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| 基金项目： | 国家自然科学基金(41730424和41961144023)联合资助； |
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| 摘 要： | 准确评价原油裂解程度对研究原油稳定性和预测油气的相态分布具有重要意义.原油裂解程度通常用金刚烷含量来表征,然而气洗和热化学硫酸盐还原作用(TSR)等次生作用可能会造成原油中金刚烷含量增加,从而难以准确评价其含量.本研究通过对塔里木盆地原油中金刚烷化合物进行分析,发现TSR初期对金刚烷含量影响不大,但会使成熟度参数乙基单...
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| 关 键 词： | 原油裂解 金刚烷含量 气洗 热化学硫酸盐还原 塔里木盆地 |
Correction of diamondoid concentrations and evaluation of cracking degree of crude oils in Tarim Basin |
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| WANG Daowei,CAI Chunfang,PENG Yanyan,SUN Peng,QI Yu,LIU Jingyan,JIANG Ziwen.Correction of diamondoid concentrations and evaluation of cracking degree of crude oils in Tarim Basin[J].Geochimica,2022,51(1):58-69. |
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| Authors: | WANG Daowei CAI Chunfang PENG Yanyan SUN Peng QI Yu LIU Jingyan JIANG Ziwen |
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| Institution: | (School of Energy Resources,China University of Geosciences,Beijing 100083,China;Key Laboratory of Genozoic and Environment,Institute of Geology and Geophysics,Chinese Academy of Science,Beijing 100029,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;School of Petroleum Engineering,Yangtze University,Wuhan 430100,Hubei,China) |
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| Abstract: | Accurately evaluating the crude oil cracking ratio is important for studying the stability of crude oil,and the distribution of the hydrocarbon phase is usually predicted using the content of diamondoids.However,secondary effects such as gas washing and thermochemical sulfate reduction(TSR)can increase the concentration of diamondoids in crude oil.Based on the analysis of diamondoids in crude oil in the Tarim Basin,this study found that TSR has little effect on diamondoids in the initial stage but can significantly increase the maturity parameter ethyl-adamantane index(EAI).Crude oils from different regions have different distribution trends on the plot of 3-+4-methyl diamantane(3-+4-MD)versus EAI.There were no gas washing or TSR effects on crude oil in the Tabei area,representing the normal crude oil cracking trend.According to the plot of 3-+4-MD verusus EAI,3-+4-MD concentrations can be corrected to eliminate secondary effects.Calculated from the corrected 3-+4-MD concentrations,the ranges of crude oil cracking ratios in Tahe,Halahatang,northwestern part of Tazhong,and southeast Tazhong are 0-44%,0-74%,54%-77%and 56%-90%,respectively.Differences in the burial and thermal histories of the reservoir led to the higher oil cracking degree in the Tazhong area than that in Tabei. |
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| Keywords: | oil cracking diamondoid concentrations gas washing TSR Tarim basin |
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