Abstract
Application of superheated water was investigated for the extraction of organic compounds of petroleum exploration importance. Using Niger Delta samples as a case study, the geochemical ratios and parameters were calculated from n-alkane and isoprenoid hydrocarbon data. The pristane/phytane, pristane/nC17, Ph/nC18 ratios and carbon preference index (CPI) ranged from 0.90 to 1.29, 0.61 to 2.30, 0.86 to 1.44, and 0.88 to 1.88 for the western Niger Delta samples, respectively, and from 0.35 to 3.49, 1.01 to 3.03, 0.87 to 1.98, and 1.00 to 2.15 for the eastern Niger Delta samples, respectively. The geochemical plots revealed that a preponderance of the samples from both western and eastern Niger Delta had mixed organic matter input and a good number of the samples also had contributions from terrestrial organic matter, while few samples had strong contributions from marine organic matter. The plots also indicated that the samples were sourced by organic matter deposited in more reducing environments than oxid...
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