Well based geochemical analysis - Northern part of the Mexican Gulf of Mexico

Geochemical analysis evaluation was focus on Burgos onshore – offshore, Salina del Bravo and Perdido fold belt provinces, Mexico. The results of Pyrolysis analyses of cutting sample indicate that most of the Cenozoic samples in Burgos onshore tend in Kerogen type III-IV, Burgos offshore province being kerogen type II-III and some samples in Kerogen type IV, while Salina de Bravo province are distributed along the kerogen IV and Perdido fold belt type are kerogen type III-IV and some samples reveal kerogen type II, with low TOC and low HI, so that no source rock potential is evident in the Cenozoic in the four provinces. Additionally, one well in the Burgos onshore One has pyrolysis data of Jurassic and Cretaceous which indicated the distribution is in kerogen type I-II. Rock data of one well in Burgos onshore as well as the oils in the basins, it could be come from only one source rock of Tithonian age which has been preserved under sub-oxic conditions. Results from isotopic analysis demonstrate that the gas occurrences in two provinces in the Gulf of Mexico are from medium to high mature source rocks, while the gas in Burgos offshore was of biogenic origin.