A new method of source and reservoir rock pyrolysis to determine the boiling point distribution of petroleum in rock samples

This paper presents a new method of source and reservoir rock pyrolysis used to understand the boiling point distribution of petroleum in rock samples. Experiments and simulations of the new incremental S1 method were performed on a range of rock types and API gravities (Black oil < 40, Volatile oil 40-45, Gas condensate ≥ 50 and Wet gas > 50). Comparison of the results from experiments and simulations are presented. The boiling point distribution results from the new incremental method can be used to infer the carbon number distribution of oil present in rock samples. However, the boiling point distribution data from the incremental S1 method is not adequate to determine the API Gravity of oil present in rock samples. Refractive index (RI) and density of oil have a straight line correlation. The boiling point distribution data from the Incremental S1 can be used in conjunction with the refractive index data to predict the composition of oil present in rock samples.