System and method for predicting fluid type and thermal maturity

A method of determining a thermal maturity image of a subterranean region of interest, comprising:

• obtaining an observed seismic dataset for the subterranean region of interest;
• collecting, using a coring system comprising a coring tool, a plurality of core samples, wherein each core sample among the plurality of core samples is taken from a different core sample position among a plurality of positions within the subterranean region of interest;
• determining, using a pyrolysis retort, a thermal maturity value for each core sample of the plurality of core samples, wherein the pyrolysis retort performs a geochemical analysis on a core sample among the plurality of core samples using controlled heating of the core sample in an inert gas to generate a plurality of hydrocarbons;
• obtaining, using a well logging tool, a plurality of well log types for each core sample position among the plurality of positions;
• determining, by a computer processor, a calibrated rock physics model based, at least in part, on the plurality of well log types;
• determining, by the computer processor, a pore fluid type based, at least in part, on the calibrated rock physics model;
• determining, by the computer processor, a thermal maturity model based, at least in part, on the thermal maturity value of each core sample, on the pore fluid type, and on the plurality of well log types;
• and
• determining, by the computer processor, the thermal maturity image of the subterranean region of interest based, at least in part, on the observed seismic dataset and on the thermal maturity model.