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The geochemical analysis and hydrocarbon generation potential of source rocks from upper Cretaceous to Eocene sedimentary sequences (southwest Iran)
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects ( IF 2.9 ) Pub Date : 2020-09-08 , DOI: 10.1080/15567036.2020.1817182
Mohammad Abdideh 1 , Enayat Allah Yazdanpanah 1
Affiliation  

The Zagros sedimentary basin in Iran is one of the most significant basins worldwide due to its potential for petroleum generation. This study assessed the hydrocarbon generation potential of the Gurpi and Pabdeh Formations as potential source rocks. For this purpose, ten samples were taken from the Pabdeh and Gurpi Formations and analyzed using Rock-Eval® 6 Turbo. The Rock-Eval data indicated that the Pabdeh and Gurpi Formations had hydrocarbon generation potential. Two of the samples from the Pabdeh and Gurpi Formations showed fair and high potential for hydrocarbon generation, respectively. Organic matter in the Gurpi Formation showed a type II kerogen, while types II and III kerogens of oil and gas prone hydrocarbons were determined in the Pebdeh Formation, respectively. Samples of the both formations were in the thermally immature stage. In addition, the determination of organic facies indicated that the sedimentary facies of the Pabdeh Formation were deposited with rapid sedimentation rates in deep marine environments due to adjoining orogenic points. Moreover, the sedimentary facies of the Gurpi Formation were an indicator of the rate of relatively reductive marine environment conditions to relatively oxidative environments with average sedimentation. The maximum and minimum organic matter content was 2.5 and 0.26 for the Pabdeh Formation and 0.88 and 0.54 for the Gurpi Formation, respectively. Moreover, the dead organic carbon content was 0.1682 wt% for the Gurpi Formation and 0.6734 wt% for the Pabdeh Formation. The determination of hydrocarbon uptake (absorption) using the rock matrix suggested that the uptake rate was higher in the samples of the Gurpi Formation than in those of the Pabdeh Formation. This indicated that the rock matrix had more clay minerals in the Gurpi Formation than in the Pabdeh Formation.



中文翻译:

上白垩统至始新世沉积序列的烃源岩的地球化学分析和生烃潜力(伊朗西南部)

伊朗的扎格罗斯(Zagros)沉积盆地由于具有石油生产潜力,因此是全球最重要的盆地之一。这项研究评估了Gurpi和Pabdeh组作为潜在烃源岩的生烃潜力。为此,从Pabdeh和Gurpi地层中采集了十个样品,并使用Rock-Eval®6 Turbo进行了分析。岩石评估数据表明,帕布德和古尔皮地层具有生烃潜力。Pabdeh和Gurpi地层中的两个样品分别显示出较高的产烃潜力。Gurpi地层中的有机质显示为II型干酪根,而Pebdeh地层中分别确定了油气易生烃的II型和III型干酪根。两种地层的样品都处于热不成熟阶段。此外,有机相的确定表明,由于相邻的造山点,帕布德组的沉积相以较快的沉积速率沉积在深海环境中。而且,古皮组的沉积相是相对还原性海洋环境条件相对于相对氧化性环境的平均沉积速率的指标。Pabdeh组的最大和最小有机质含量分别为2.5和0.26,Gurpi组的最大和最小有机质含量分别为0.88和0.54。此外,Gurpi组的死有机碳含量为0.1682 wt%,Pabdeh组的为0.6734 wt%。使用岩石基质测定碳氢化合物的吸收(吸收)表明,古尔皮组样品的吸收速率高于帕布德组的样品。这表明,古尔皮组的岩石基质比帕布德组的粘土矿物更多。

更新日期:2020-09-08
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