Characteristics of Pre-Tertiary fractured granitoid basement in Hai Su Den field, Cuu Long basin
Abstract
Hydrocarbon is mainly stored in the secondary pores of granitoid basements as a result of fracturing and deforming by tectonic and geothermal activities. The petrographical and geochemical composition of the granitoid basements is proved to affect their brittleness and deformation ability which consequently impacts on their porosity and permeability. Based on the analysis of seismic and petrophysical data gathered from 5 exploration wells in the Hai Su Den field, the causes of fracture formation as well as fracture roles on the permeability of basement reservoirs and the characteristics of granitoid basements in the Hai Su Den field were identified. Seismic characterisation, Artificial Neural Network (ANN) and geostatistical methods were then applied to build 3D geological model of macro and micro porosity distribution.
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