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在近几年来,人们倾向于利用Rock-Eval热解法的氢指数来评价烃源岩,而忽略了用干酪根H/C比值评价烃源岩的优点。Rock-Eval热解法能快速、廉价、定量(mgHC/g岩石)地给出岩石中干酪根的热解数据。由于在数据分布上的普遍分散性,一般人们认为Rock-Eval热解法对烃源岩评价是一种筛选评价。描述了在烃源岩评价中应用H/C比值的优点,并确定了H/C比值与热成熟度、有机质转化率和排油量之间新的相关性。 热解干酪根的H/C比值与Ⅰ型、Ⅱ型干酪根的热转化率程度存在一定的相关性。定量计算的氢和碳损失与加水热解实验中的损失具有很好的一致性,表明干酪根H/C比值可作为干酪根端元热成熟度的一个好的指标。如果现在和原始H/C比值确定,那么这些数据同时也为评价有机质转化率提供了一种新的方法。现在H/C比值可通过微相有机质分析测试。对于生油源岩,Ⅰ型未熟干酪根的H/C比值为1.35～1.50,Ⅱ型H/C比值为1.20～1.35。 在加热水解实验中,油的排出量与H/C比值之间的相关性可为勘探工作者提供一种快速评价油的排出量的方法。依据加水热解实验、测试的H/C比值和计算的原始TOC(总有机碳)对Williston盆地(Bakken页岩)、Los Angeles盆地(Nodular页岩)和Illionis盆地(New Albany页岩)的成熟烃源岩进行了初步体积估算,其结果于已?
In recent years, people have tended to evaluate hydrocarbon source rocks by using the hydrogen index of the Rock-Eval pyrolysis method while ignoring the advantages of using kerogen H / C ratios to evaluate source rocks. The Rock-Eval pyrolysis method gives pyrolysis data of kerogen in rocks quickly, inexpensively and quantitatively (mgHC / g rock). Due to the general dispersion in data distribution, Rock-Eval pyrolysis is generally considered as a screening evaluation of source rock. Describes the advantages of applying H / C ratios in the evaluation of source rocks and establishes a new correlation between H / C ratio and thermal maturity, organic matter conversion, and oil displacement. The H / C ratio of pyrolyzed kerogen has some correlation with the degree of thermal conversion of type I and type II kerogen. Quantitatively calculated hydrogen and carbon losses are in good agreement with losses from hydrothermal pyrolysis experiments, indicating that the kerogen H / C ratio can be used as a good indicator of the thermal maturity of the kerogen endmember. If the current H / C ratio is fixed, these data also provide a new way to evaluate the organic matter conversion rate. Now the H / C ratio can be measured by micro-organic analysis. For the source rock, the H / C ratio of type I unripe kerogen is 1.35-1.50, and the type II H / C ratio is 1.20-1.35. In the hydrolization experiments, the correlation between the oil discharge and the H / C ratio may provide the exploration worker with a way to quickly assess the amount of oil discharged. The maturation of the Williston Basin (Bakken Shale), the Los Angeles Basin (Nodular Shale) and the Illionis Basin (New Albany Shale) based on the hydrothermal pyrolysis experiment, the tested H / C ratio and the calculated raw TOC (total organic carbon) The initial volume of source rock was estimated, the result has been?