Petrobras (Brazil)

Matrix Acidizing in Dolomitic Rocks: Wormhole Development and Injection Performance Analysis

Abstract Matrix acidizing is widely used to improve the productivity of carbonate reservoirs, particularly those with significant dolomitic content, which account for a substantial fraction of global hydrocarbon reserves. In this study, the pore volume to breakthrough (PVbt) beha...

Sacrificial anode Fered–Fenton process for the degradation of a model naphthenic acid in high‐salinity water

Abstract Offshore oilfield produced water (OPW) is a highly complex and hypersaline effluent from oil and gas extraction industry. Since the water‐soluble organic (WSO) compounds in its composition are challenging to be eliminated, their treatment by various advanced oxidation pr...

Predicting barrier-fluid failure for temporary abandonment of petroleum wells with a tabular foundation model

Temporary well abandonment may rely on liquid barrier fluids that must retain integrity under temperature–time exposure. It was evaluated whether supervised learning can predict barrier-fluid failure from routine laboratory measurements (pH, density, apparent viscosity) obtained...

A matrix-free Gauss-Newton inversion of realistic CSEM data

Abstract In hydrocarbon exploration, frontier areas and the increasing demand for realistic geoelectrical models constitute significant challenges to the industry. In this context, the marine controlled-source electromagnetic (CSEM) method has emerged as an important complementar...

Diagenetic Constraints and Impact of Silicification on the Quality of Pre‐Salt Reservoirs of the Sépia Field, Santos Basin, Brazil: Insights From Oxygen Isotopes and Fluid Inclusions

ABSTRACT The conditions and role of silicification in the giant South Atlantic pre‐salt reservoirs have been widely debated recently. Many studies link silicification with degraded reservoir quality, whereas others associate it with increased permeability. Predicting the occurren...

Surfactantsfor Enhanced Oil Recovery: Progress andInnovations over the Past Decade

Abstract Surfactant-based strategies have emerged as key approaches for enhancing oil recovery (EOR), particularly in mature reservoirs where conventional production methods leave a substantial fraction of oil unrecovered. This review provides a comprehensive and critical assessm...