The economics of development operations in the Browse Basin are often adversely affected by the isolation of the area and by the fact that the majority of the basin lies in waters more than m deep.
The recent discovery of small islands in the Scott Reef area by Geoscience Australia has led to a revision of the boundaries between WA and Commonwealth jurisdictions, resulting in the WA administered area increasing in size. For information on the commonwealth areas of the Browse Basin see Geoscience Australia website. The Browse Basin, which forms part of the Westralian Superbasin, is a northeast-trending depocentre containing up to 15 km of Paleozoic to Cenozoic sediments.
The oldest sediments in the basin, assumed to be Permian in age, are identified along the southeastern basin margin in the Rob Roy 1 and Yampi 1 wells, suggesting that sedimentation commenced during rift initiation along the North West Shelf.
The sedimentary succession of the Browse Basin is divided into two episodes, Late Permian to Jurassic, and Late Jurassic to Cenozoic, with a regional Jurassic unconformity terminating the first episode.
Seismic horizons are colour-coded to sequence boundaries shown on the Tectonostratigraphic Chart. Geochemical analysis including biomarkers and isotopic data of recovered oils, condensates and gases indicates that at least four hydrocarbon families are present in the Browse Basin see Kennard et al. Mature potential source rocks have been identified over much of the basin and are best developed within the Lower Permian, Jurassic and Lower Cretaceous sections.
These source units underpin four major hypothetical petroleum systems identified in the basin Blevin et al. Browse Basin. Browse Basin Stratigraphic Column. Related Information. Late Cretaceous ponded turbidite systems: A new stratigraphic play fairway in the Browse Basin.
Gas fields of the Browse Basin. IN: Purcell, P. Blevin, J. Boreham, C. Volume 1, interpretation report. Wireline logging has indicated the presence of gas throughout the relatively low-permeability sandstone interval. Pressure data acquired within the reservoir supports the potential for the gas column to extend below the base of the sand. The reservoir penetrated in the Burnside-1ST1 well is within the same geologic formation that is gas-bearing in nearby fields such as Ichthys, Mimia and Prelude.
Further work will now be done on recovered samples to understand the reservoir characteristics and an appraisal plan will be developed to define the size of the resource.
0コメント