POLYMER FLOODING TO IMPROVE VOLUMETRIC SWEEP EFFICIENCY IN WATERFLOODING PROCESSES
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POLYMER FLOODING TO IMPROVE VOLUMETRIC SWEEP EFFICIENCY IN WATERFLOODING PROCESSES

Castro-Garcia, Rubén-Hernán;Maya-Toro, Gustavo-Adolfo;Jimenez-Diaz, Robinson;Quintero-Perez, Henderson-Ivan;Díaz-Guardia, Venus-Minerva;Colmenares-Vargas, Kelly-Margarita;Palma-Bustamante, Jorge-Mario;Delgadillo-Aya, Claudia-Lorena;Pérez-Romero, Romel-Antonio;
CT&F Ciencia, Tecnología & Futuro 0000 Vol. 6 pp. 71-90
54
castrogarcia0000polymerctf

Abstract

Polymer flooding is a commercial Enhanced Oil Recovery (EOR) process that belongs to the chemical EOR methods. Its principal objective is to improve reservoir sweep efficiency in mature and recent waterfloods. This paper describes a methodology, developed at the Instituto Colombiano del Petróleo, for the theoretical evaluation, project design (screening, geological and engineering analysis, experimental evaluation, numerical simulation and financial analysis), pilot implementation and surveillance of the injection process. The first polymer flooding pilot implemented in Colombia by Ecopetrol is described here as an example of the methodology developed. Results of this project show an increase in oil production rates and, a decrease in water cuts increasing the oil recovery factor of patterns YR-504 and YR-510 of Yarigui- Cantagallo Field. Over two million barrels of polymer solution have been injected in the pilot during the first two continuous years of operation. This enables the assimilation of lessons learned and best practices for continual improvement in the operation of such processes. Based on the pilot success, the feasibility of expanding this EOR method in this and other Colombian fields is being evaluated.

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