Quantitative evaluation of hydrocarbon yielding potential of source rock: application of pyrolysis in finite space

With the formation porosity thermocompression simulation experiment instrument designed by Wuxi Research Institute of Petroleum Geology,immature perse mudstones from the 3rd member of Hetaoyuan Formation in the Biyang Sag were pyrolyzed in finite space and with phased,continuous and progressive temperature.The stage and total product rates of oil,gas and total hydrocarbon of type Ⅱ 1 kerogen during different evolution stages were calculated.Comparison was made between the above-mentioned method and the conventional open-system Rock-Eval experiment.A new evaluation method to study hydrocarbon generation potential in finite space was put forward.The following parameters were used to judge the hydrocarbon generation potential of kerogen.1)Residual oil potential and index.2)Oil generation potential and index of kerogen.3)Gas generation potential and index of kerogen.4)Total hydrocarbon generation potential and index of kerogen.5)Maximum temperatures for oil,gas and total hydrocarbon generation and reflectance.Quantitative evaluation of oil,gas and total hydrocarbon generation potential of kerogen during certain stage was made,and the generation process was described using the parameters.