Highly Detailed Reservoir Characterization of Tight Thin Sandstone through Geostatistical Inversion in a Gas Field China

A gas field, China, the target reservoirs are mainly delta front depositions, which are tight, thin and below the tuning thickness. In order to characterise the thin effective reservoir and porosity distribution in this field, a geostatistical inversion and co-simulation were performed. Using geostatistical inversion technology we can integrate the information of well logs, geological constraints, geostatistical parameters and seismic data to create multiple high resolution realizations, resulting in highly detailed elastic volumes of P-Impedance, Vp/Vs, density, as well as lithofacies distribution and the co-simulated porosity. The combination analysis of the results can be used to propose new drilling locations. New well data shows the validity of this technology, maximum solve the problem of the low porosity, low permeability and thin reservoir.