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通过模拟实验,人们已经对原油及其族组分中高碳数烃类在高温裂解过程中对金刚烷类化合物生成的贡献有较深的了解,但是缺乏对轻质组分的关注,忽略了它们对金刚烷类化合物的生成以及参数应用方面可能存在的影响.本文利用塔里木盆地HD23井正常原油挥发前后油样的裂解动力学模拟实验,结合金刚烷类化合物的定量分析来探讨原油中易挥发组分是否对金刚烷类化合物的生成和成熟度参数存在显著影响.结果表明,原油中易挥发的轻烃组分(≤n C12)对单金刚烷类化合物的生成具有明显的贡献,且主要发生在原油裂解的早期(Easy Ro<1.0%),同时影响单金刚烷成熟度参数的变化特征;但对双金刚烷类化合物及其成熟度参数则没有明显的影响.因此,实际地质过程中可能造成原油中轻烃组分损失的次生改造作用(如运移、气洗和生物降解作用等),可能会对原油后期裂解的单金刚烷类化合物的生成产生影响,从而影响单金刚烷类指标的实际应用.
Through the simulation experiments, people have a deep understanding of the contribution of high-carbon hydrocarbons in the crude oil and its family components to the production of adamantanes during the pyrolysis of high-temperature hydrocarbons. However, they lack attention to the light components and ignore them On the formation of adamantane compounds and the possible application of parameters.In this paper, HD23 wells in the Tarim Basin crude oil volatilization before and after normal oil cracking kinetics simulation experiment, combined with quantitative analysis of adamantanes to explore the volatile oil group The results show that the volatile hydrocarbon components (≤n C12) in crude oil have a significant contribution to the formation of monoadamantanes and mainly occur In the early stage of crude oil cracking (Easy Ro <1.0%), the characteristics of monoadamantane maturity parameters are affected at the same time; however, there is no obvious influence on the parameters of biadamantanes and their maturity parameters. Therefore, Secondary remodeling (such as migration, gas scrubbing and biodegradation) that contribute to the loss of light hydrocarbon components in crude oils may result in a single Adamantane compounds have an impact on the formation, thus affecting the practical application of monoadamantanes indicators.