Publications

A suite of 3D geological models for the Abadi gas field discovered in the Arafura Sea has been constructed by integrating all the available information including cores, well logs and 3D seismic data. The facies observed through core description are reviewed from a petrophysical point of view and three facies groups are defined for facie modeling. A pixel-based indicator method is applied to distribute facies in the model using the inverted seismic Vp/Vs cube as a guide. The probability function defines the probability of finding a particular facies for a given Vp/Vs from the seismic volume. Porosity modeling is conducted using the effective porosity cube from seismic inversion as a secondary variable and the porosity model is subsequently used as a guide for permeability modeling. Sw model is constructed based on Sw versus height function prepared for each permeability range and facies. Uncertainty in gas initial in place (GIIP) is evaluated by multiple scenario technique with design of experiment. The factors with significant impacts on GIIP are identified and a response surface model is generated showing the relationship between each parameter and GIIP. Monte Carlo simulation is carried out to generate a probabilistic distribution of GIIP.