In order to assess a source rock for economical exploitation purposes, many parameters should be considered; regarding the geochemical aspects, the most important ones are the amount of organic matter (OM) and its quality. Quality refers to the thermal maturity level and the type of OM from which it was formed. The origin of the OM affects the ability of the deposited OM between sediments to generate oil, gas, or both with particular potential after going through thermal maturation. Vitrinite reflectance and programmed pyrolysis (for instance, Rock-Eval) are common methods for evaluating the thermal maturity of the OM and its potential to generate petroleum, but they do not provide us with answers to what extent solid bitumen is oil-prone or gas-prone, as they are bulk geochemical methods. In the present study, Raman spectroscopy (RS), as a powerful tool for studying carbonaceous materials and organic matter, was conducted on shale and coal samples and their individual macerals to show the potential of this technique in kerogen typing and to reveal the parent maceral of the examined bitumen. The proposed methodology, by exhibiting the chemical structure of different organic matters as a major secondary product in unconventional reservoirs, can also detect the behavior of solid bitumen and its hydrocarbon production potential for more accurate petroleum system evaluation.

中文翻译：

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用拉曼光谱法从生产的沥青回溯到母体

为了评估出于经济开发目的的烃源岩，应考虑许多参数。在地球化学方面，最重要的是有机物（OM）的数量及其质量。质量是指热成熟度和形成它的OM的类型。OM的起源会影响沉积物之间沉积的OM经过热成熟后产生具有特定电势的油，气或两者的能力。玻璃体反射率和程序热解（例如Rock-Eval）是评估OM的热成熟度及其产生石油潜力的常用方法，但它们无法为我们提供固体沥青易生油或天然气程度的答案。容易发生，因为它们是大量地球化学方法。在本研究中，拉曼光谱（RS）作为研究含碳物质和有机物的有力工具，对页岩和煤样品及其各个成分进行了研究，以证明该技术在干酪根分型中的潜力，并揭示了所检测沥青的母体成分。所提出的方法通过展现非常规油藏中主要有机副产品的不同有机物的化学结构，还可以检测固体沥青的行为及其烃的生产潜力，以进行更准确的石油系统评估。