Colloidal dispersion gels (CDG) to improve volumetric sweep efficiency in aterflooding processes.

  • Rubén Hernán Castro García Ecopetrol S.A.
  • Gustavo Adolfo Maya Toro Ecopetrol S.A.
  • Jorge Eduardo Sandoval Muñoz Ecopetrol S.A.
  • Lia Margarita Cohen Paternina UT UP Consultorias.
Keywords: Colloidal Dispersion Gels (CDG), Enhanced Oil Recovery (EOR), Chemical injection, Polymer, Numerical simulation

Abstract

Aviable option for the sustainability of hydrocarbon supply in the short and medium term is  increasing the expected ultimate oil recovery factor through Enhanced Oil Recovery processes (EOR).

The purpose of this paper is to describe a methodology to evaluate EOR technologies developed at the Instituto Colombiano del Petróleo (ICP) of ECOPETROL S.A. in 2012.  The methodology includes theoretical evalua-tion, design (geological analysis, engineering analysis, laboratory static and dynamic tests and numerical simulation, among others), field implementation and surveillance of Colloidal Dispersion Gels (CDG) injection. CDG is an EOR method that consists in the co-injection of high molecular weight polymer and a cross-linker, to generate microgels in the reservoir. This technology has become an alternative to polymer flooding.

This paper describes a field application in Dina Cretáceos Field (Dina) supported by the proposed methodology, which corresponds to the first chemical enhanced oil recovery pilot implemented in Colombia by ECOPETROL S.A.  Results of this study show an increase in volumetric sweep efficiency due the improvement of the mobility ratio, increasing in oil production and decreasing in water production.  Based on the results of this pilot, which started in June 2011, the feasibility of expanding the use of CDG technology in Dina and others fields of Colombia is being assessed at present.

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How to Cite
Castro García, R. H., Maya Toro, G. A., Sandoval Muñoz, J. E., & Cohen Paternina, L. M. (2013). Colloidal dispersion gels (CDG) to improve volumetric sweep efficiency in aterflooding processes. CT&F - Ciencia, Tecnología Y Futuro, 5(3), 61–78. https://doi.org/10.29047/01225383.48

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Published
2013-12-15
Section
Scientific and Technological Research Articles

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