Used Approaches for Carbonates Acidizing Offshore Brazil

Abstract

Although the new Brazilian carbonate reservoir discoveries represent a huge undertaking, on acidizing terms, many of the challenges faced nowadays are very similar to those found in the old carbonate reservoir fields. Problems like high permeability contrast, heterogeneous porosity distribution and long production intervals have their complexity increased by the completion and production needs. Despite all these problems, the use of conventional approaches, applying basic techniques, has produced good results leaving some time to the development of more specific solutions, once there are still some limitations to overcome. Among those conventional techniques, pilot zones associated with chemical diversion have been intensively used although mechanical diversion has been limited by the completion arrangement. This paper describes acidizing techniques that have been applied on Brazilian offshore carbonate fields, some observed problems and present some trends related to the development of new acidizing techniques.

Self-Diverting Acid for Effective Carbonate Stimulation Offshore Brazil: A Successful History

“…Pereira et al (2012), dicussed the main placement techniques applied in offshore Brazil as summarized below: Pereira et al (2012), dicussed the main placement techniques applied in offshore Brazil as summarized below:…”