石油地球化学 Petroleum geochemistry 是在油气地质理论的基础上，应用化学原理和观点，研究油气生成、运移、聚集和转化的地球化学作用和过程，阐明石油地球化学的基本原理和规律，探讨其应用于油气勘探(以至开发)的实用技术和方法的学科，是有机地球化学的分支。
石油地球化学是应用化学原理研究石油的成因、运移、聚集与蚀变的科学。
The science of petroleum geochemistry is the application of chemical principles to the study of the origin, migration, accumulation, and alteration of petroleum.
地层水中苯的痕量分布作为油气藏分子示踪的研究，得到国外石油地球化学家们的广泛重视。
Geochemists paid more attention to the study of reservoir molecule tracing with the trace amount distribution of BTEX in formation water.
此项技术是石油地球化学领域中已证实的卓有成效的分析手段。该产品已在各油田广泛使用，效果很好。
This technology is an analytic method that has been proved outstanding in geochemistry field and the instrument has been favorably used in many oilfields.
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