Organic geochemistry, burial history and hydrocarbon generation modelling of the upper jurassic madbi formation, masila basin, Yemen
Document Type
Article
Publication Date
1-1-2010
Abstract
Cuttings samples of shales from the Upper Jurassic Madbi Formation from boreholes in the centre-west of the Masila Basin were analysed using organic geochemistry (Rock-Eval pyrolysis, extract analysis) and organic petrology. The shales generally contain more than 2.0 wt % TOC and have very good to excellent hydrocarbon potential. Kerogen is predominantly algal Type II with minor Type I. Thermal maturity of the organic matter is R(r) 0.69-0.91%. Thermal and burial history models indicate that the Madbi Formation source rock entered the early-mature to mature stage in the Late Cretaceous to Early Tertiary. Hydrocarbon generation began in the Late Cretaceous, reaching maximum rates during the Early Tertiary. Cretaceous subsidence had only a minor influence on source rock maturation and OM transformation.
Keywords
Organic geochemistry, source rocks, maturity, Madbi Formation, basin modelling, hydrocarbon generation, Masila Basin, Yemen
Publication Title
Journal of Petroleum Geology
Volume
34
Issue
4
Publisher
Wiley-Blackwell
Publisher Location
COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA