Correction of measured vitrinte reflectance data using the

Reflectance of maceral constituents of kerogens, particularly vitrinite (Ro%), commonly used in petroleum exploration, is a very important indicator for determining degree of thermal maturity and investigating status of hydrocarbon generation. Although in vitrinite reflectance profiles maturity generally increases with increasing depth of burial, basin modelers often experience problems when modeling thermal maturity using vitrinite reflectance data measured by using reflected light- photometer microscopes. The problem of reduced vitrinite reflectance mainly arises due to reflectance suppression in vitrintes. By using the laser Raman microprobe, a new multi-parameter technique called "Fluorescence Alteration of Multiple Macerals (FAMM)" was developed by Australian scientists to solve these problems. In this study, data obtained by application of this method were used to correct suppressed vitrinite reflectance values. In order to examine and demonstrate the extent of suppression effect on modeling results, maturity profile constructed by one-dimensional modeling of Well Binak-4 was calibrated using conventional measured vitrinite reflectance (Ro%) and FAMM equivalent vitrinite reflectance (EqVR) data and results were compared with present time measured well temperatures. The crucial differences in maturation, transformation ratio, hydrocarbon generation and expulsion resulted from application of these two type data as calibration parameters are discussed and demonstrated using relevant diagrams.