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Abstract In the Campos Basin, Petrobras discovered the first giant fields in the 1980's, which led to a technological development enabling worldwide deepwater production and later, the production of the Pre-salt fields. Additionally, the achievements in Marlim and Roncador fields have earned two OTC awards. Over the past 40 years, more than 14 billion barrels of hydrocarbons have been produced in the Basin, and it currently accounts for approximately 25% of Brazil's total production. Despite its historical significance, the Campos Basin faces challenges related to declining production from mature fields, as many productions units and wells are reaching the end of their lifespan, requiring investments in infrastructure and exploration. However, the basin still holds significant untapped resources, providing opportunities for future development and growth, as the main Concession contracts have been extended beyond 2048. New projects have been conceived and integrated into Campus Basin Revitalization Program (Marlim, Albacora and Barracuda), in which Petrobras plans to invest U22 billion up to 2028. However, ensuring the viability of brownfields projects requires careful control over Capital Expenditures (CAPEX) and Operational Expenditures (OPEX), or the costs of well construction would impact deeply in the project benefits. This paper provides an overview of the efforts made by well engineering regarding design, practices, and processes implemented in recent years to enhance performance in well construction, enable economically marginal projects, and add greater value to the projects in the Campos Basin.
Duccini et al. (Mon,) studied this question.