Hydrous pyrolysis (HP) practiced on type-II kerogen-bearing oil shale samples from the Sargelu Formation in the Ghali-Kuh Area, western Iran, using a specially designed apparatus was performed at different temperatures (250–350°C), with hydrocarbon generation evaluated at each temperature. For comparison, the samples subjected to Rock-Eval pyrolysis before proceeding to HP resulted in T_max = 418°C, HI = 102, and TOC = 4.33%, indicating immaturity and hence remarkable hydrocarbon (especially oil) generation potential, making them appropriate for HP. Moreover, the samples were deposited in a low-energy reductive marine environment, with maximum oil and gas generation (739 mg and 348 mg out of 50 g of rock sample, respectively) observed at 330°C and 350°C, respectively. The oil generated at 330°C was subjected to gas chromatography (GC) and isotopic analyses to assess hydrocarbon quality and composition. The hydrocarbon generation data was devised to estimate kinetic indices of the Arrhenius equation and to investigate the gas–oil ratio (GOR) and overall conversion yield. Based on the producible hydrocarbon quantity and quality, the findings contribute to the economic assessment of oil shales across the study area. The developed kinetic model indicates the history of hydrocarbon generation and organic matter (OM) maturity.

中文翻译：

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伊朗Ⅱ型含干酪根烃源岩的水热裂解研究及其在油气产品地球化学和动力学分析中的应用

使用专门设计的设备在不同温度 (250–350°C) 下对来自伊朗西部 Ghali-Kuh 地区 Sargelu 组的 II 型干酪根油页岩样品进行了水热解 (HP)在每个温度下评估的代数。为了比较，在进行 HP 之前进行 Rock-Eval 热解的样品导致T _max= 418°C，HI = 102，TOC = 4.33%，表明不成熟，因此具有显着的碳氢化合物（尤其是石油）生成潜力，适用于 HP。此外，样品沉积在低能量还原性海洋环境中，在 330°C 和 350°C 下分别观察到最大的石油和天然气生成量（50 克岩石样品中分别产生 739 毫克和 348 毫克）。对在 330°C 下生成的油进行气相色谱 (GC) 和同位素分析，以评估碳氢化合物的质量和组成。设计烃生成数据以估计阿伦尼乌斯方程的动力学指数并研究气油比 (GOR) 和总转化率。基于可生产的碳氢化合物数量和质量，研究结果有助于对整个研究区域的油页岩进行经济评估。