TITLE:
Evaluation of Hydrocarbon Generated and Expelled from the Jurassic to Early Cretaceous Source Rocks in the Lynedoch Field, Northern Bonaparte Basin, Australia
AUTHORS:
Rakotondravoavy Jules, Jiaren Ye, Qiang Cao
KEYWORDS:
Calder Graben, Hydrocarbon Generation, Hydrocarbon Expulsion, Lynedoch Field, Northern Bonaparte Basin
JOURNAL NAME:
International Journal of Geosciences,
Vol.7 No.4,
April
27,
2016
ABSTRACT: The Lynedoch field is
located on the west flank of the Calder Graben in the north-eastern Bonaparte
Basin, Australia. The data from the wells Lynedoch 1 and Lynedoch 2 and Seismic
Line N11809 were used to reconstruct the burial and thermal histories and evaluate
the hydrocarbon generated and expelled from the Jurassic to Early Cretaceous
source rocks of the study area. Basin Mod 1-D and 2-D softwares were used for
modeling. The Upper Jurassic Cleia (Lower Frigate) and Lower Cretaceous Echuca
Shoals formations source rocks in the well Lynedoch 1 were a fair-to-good
source richness with poor hydrocarbon generating potential, showing kerogen
type III and gas prone. The Middle Jurassic Plover Formation source rock in the
well Lynedoch 2 was a good organic matter richness with poor hydrocarbon
generative potential, the late Middle Jurassic (Callovian) Elang Formation
source rock in the same well was a fair source rock with poor hydrocarbon
generation potential, and the Lower Cretaceous Echuca Shoals Formation source
rock in the same well was a fair-to-very good organic richness with
poor-to-fair hydrocarbon generating potential, gas prone with kerogen type III,
and reaching wet gas window at present day. These previous formations of the
both wells generated oil at the Late Cretaceous and gas at the Early Neogene.
But, only Echuca Shoals Formation source rock in the well Lynedoch 2 was able
to expelled hydrocarbon at the Middle Paleogene and continued up to present
day. This Formation represents fair to slightly good potential source rock in
the Lynedoch field.