Caracterización del reservorio Pariñas en el bloque Yapato-Capullana, campo Lobitos, lote Z-2B

Abstract

This thesis aims to characterize the Pariñas Formation in flow units and build a 3D geomodel to serve as an input in secondary recovery simulation projects. Accordingly, the workflow proposed by Roger Slatt (2013), in his book Stratigraphic Reservoir Characterization, was followed. The work area corresponds to Yapato-Capullana block, belonging to the Lobitos field in the Talara basin. It is located off the coast of the La Brea district, Talara province, Piura region. The block was drilled first time in 1976 by the Yapato-107 and Capullana-140 wells. To date, a total of 12 wells have been drilled. The geological context belongs to the Talara basin, which is a fore-arc basin. Its development began from the Paleogene parallel to the Andes mountain range. It presents a structural style of normal listric faulting and antithetic normal. A geocellular model describes physical aspects of the reservoir through an arrangement of discrete cells and its generation requires the definition of a sedimentary, structural and petrophysical model. Flow units’ characterization is the subdivision of the reservoir based on similar petrophysical characteristics such as the porosity-permeability relationship and water saturation, which are maintained in the same geological framework. The sedimentary model of Pariñas Formation is defined as a fluvial-deltaic environment with an E-W direction and was validated by the core from 12623-Bronco well. The core lithological description defined six main facies which correspond to delta plain, delta front and prodelta sub environments.