Seismic characterization of the Chapapotal Member turbidites by Truncated Gaussian Simulation

Abstract

In the JUSEPÍN field, the turbidites of the Chapapotal Member (Carapita Formation) constitute an exploration target in areas adjacent to a reservoir with complex sand distribution, requiring quantitative analysis using seismic amplitude data. The study aims characterization of sandy facies of turbidite origin by acoustic seismic inversion techniques, unsupervised neural networks and a stochastic method for categorical variables definition, defined as Truncated Gaussian Simulation. The applied methodology resulted in an acoustic impedance volume, highlighting stratigraphic characteristics, a three-dimensional seismic facies model, associated with rock properties and an electrofacies model, which allowed the identification of geobodies and a three-dimensional facies model. The identified bodies of sand facies are distributed throughout the area and particularly at the top of the Chapapotal Member supporting exploration prospects and the opening of the resource base in the Jusepín field.