DISENTANGLEMENT OF HYDROGEN INDEX AND S1 TOTAL ORGANIC-CARBON VARIATIONS WITH DEPTH/

Many workers, especially in coal studies, have suggested that changes which occur during pyrolysis studies could lead to mobile components b eing retained within the macromolecular network, rather than being ins tantaneously released. This process has the potential to cloud the res ults from ROCK EVAL pyrolysis. We present a procedure that can be used to disentangle the effects of delayed emission of mobile components d uring ROCK EVAL pyrolysis. This procedure is illustrated using four we lls from East Kalimantan, Indonesia, which have hydrogen index (HI) vs depth curves that increase with depth, contrary to conventional expec tations. The disentanglement procedure developed in this paper is used to show that delayed emission may be an explanation for the anomalous HI vs depth behavior in these wells. Possible delayed emission of S1 products may adulterate the S1 and S2 signals, requiring that this pos sibility be considered during ROCK EVAL pyrolysis data analysis.