Should fluorescence alteration replace vitrinite reflectance as a major tool for thermal maturity determination in oil exploration

摘要: Abstract The fluorescence alteration multiple macerals (FAMM) technique is closely related to vitrinite reflectance. Until recently, study of dispersed organic matter (DOM) in sedimentary rocks has been regarded as technically difficult. With the introduction optical microprobes equipped with small continuous wave gas lasers having a very stable output blue radiation readily focused 1–2 μm on sample, this work now become routine. FAMM important advantages over reflectance stemming from possibility resolving data into two parameters, one level maturation, and other hydrogen-richness maceral. This enables resolution what are often difficult problems for single parameter technique, namely identification indigenous DOM, recognition caved reworked matter, suppression For these reasons, powerful tool investigating anomalies, especially those associated unconformities. It also well suited investigate tacit assumption that all telocollinite matures along compositional pathway. not without problems. range restricted equivalent mean random Rm o = 0.4–1.2, results more sensitive ambient temperature oxidation than reflectance, demands high technical expertise. calibrated coals it therefore likely give quality Types II III kerogens rather Type I which have yet intensively investigated. Although unlikely replace considerable confidence may be had maturation assessment when consistent obtained but independent techniques.