Institute for Geochemical Research, Hungarian Academy of Sciences, Budaorsi ut 45, H-1112 Budapest, Hungary.
Rapid Commun Mass Spectrom. 2011 Jan 15;25(1):191-8. doi: 10.1002/rcm.4859.
Several crude oil accumulations in the Pannonian Basin are trapped in uncommonly hot (>170°C) reservoirs. Their maturities range from mature to very mature on the basis of cracking parameters of their biological marker homologous series (ratio of products to reactants). A stable carbon isotopic study of these oils, poor in biological markers commonly used for correlation purposes, did not provide a reliable oil-to-oil correlation. As an alternative tool, the hydrogen isotope compositions of oil fractions separated on the basis of different polarities were measured, and hydrogen isotope type-curves were generated for a set of mature to very mature crude oil samples. This method of presenting hydrogen isotope composition of fractions as type-curves is novel. Nineteen samples (17 crude oils from SE-Hungary, 1 oil condensate and 1 artificial oil) were chosen for the present study. The aim was to examine the applicability of hydrogen isotope type-curves in oil-to-oil correlation and to test the simultaneous application of carbon and hydrogen isotope type-curves in the field of petroleum geochemistry. We have shown that, although the conventionally used co-variation plots proved to be inadequate for the correlation of these hot and mature oils, the simultaneous use of carbon and the newly introduced hydrogen isotope type-curves allows us to group and distinguish oils of different origins.
几个在潘诺尼亚盆地的原油储集层位于异常高温（>170°C）的储层中。根据其生物标志物同源系列的裂解参数（产物与反应物的比值），这些油的成熟度范围为成熟到非常成熟。对这些生物标志物含量低、通常用于相关目的的油进行稳定碳同位素研究，并未提供可靠的油与油之间的相关性。作为一种替代工具，测量了根据不同极性分离的油馏分的氢同位素组成，并为一组成熟到非常成熟的原油样品生成了氢同位素类型曲线。这种以类型曲线形式呈现馏分氢同位素组成的方法是新颖的。本研究选择了 19 个样品（来自 SE-匈牙利的 17 个原油、1 个油凝析物和 1 个人工油）。目的是检验氢同位素类型曲线在油与油相关性研究中的适用性，并测试碳和氢同位素类型曲线在石油地球化学领域的同时应用。我们已经表明，尽管传统上使用的共变图对于这些高温成熟油的相关性证明是不够的，但同时使用碳和新引入的氢同位素类型曲线可以使我们对不同来源的油进行分组和区分。
