Alex Tadeu Almeida Waldmann

AVALIAÇÃO DO POTENCIAL USO DE BIOGLICERINA COMO BASE PARA FORMULAÇÃO DE FLUIDOS DE PERFURAÇÃO AQUOSOS PARA POÇOS DE PETRÓLEO E GÁS

Cleysson C. Corrêaa, Georgiana F. da Cruza,*, Alexandre S. L. Vaz Jra, Bianca de S. A. Araújoa, Alexsandro A. da Silvab, Rafael A. Rodriguesb , Rosana F. T. Lombac e Alex T. de A. Waldmannc Laboraório de Engenharia e Exploração de Petróleo, Universidade Estadual do Norte Fluminense Darcy Ribeiro, 27.925-535 Macaé – RJ, Brasil Central Analítica Fernanda Coutinho, Instituto de Química, Universidade do Estado do Rio de Janeiro, 20550-900 Rio de Janeiro – RJ, Brasil Centro de Pesquisas e Desenvolvimento Leopoldo Américo Miguez de Mello, Cidade Universitária, 21941-915 Rio de Janeiro – RJ, Brasil

On the Rheological Mechanisms Governing Drill-in Fluid Invasion into Reservoir Rocks

This article deals with the comprehension of the rheological mechanisms relevant to drill in fluid invasion through reservoir rocks, aiming the design of a solids free non-invasive fluid. Experimental results indicate that highly concentrated solution presented relevant deviations to Darcy’s Law. Expressions for resistive force estimation as functions of the first normal stress difference, linear viscoelastic parameters and Trouton ratios are proposed to account for the extra friction

Well Construction Hydraulics in Challenging Environments

Hydraulics plaies a major role in well construction, especially in narrow operational window scenarios, where the difference between pore and frac pressures approaches zero. Besides, special geometry wells, where annular friction losses contribute expressively to downhole pressures, are becoming attractive alternatives to enhance production. Efficient drilled cuttings transport, minimizing contamination in fluid substitution operations and gravel packing are critical operations to be performed. The hydraulic targets for such projects require multidisciplinary technological development, including real time monitoration of downhole pressure, density and friction reduction concepts, chemicals and equipment, rheology optimization and reliable multiphase models. This article focuses on the application of latest design, chemicals, software, and equipment technology for drilling and completing (including sand control) in challenging scenarios, such as ultra deepwater exploratory wells, extended reach offshore wells, 2000 m horizontal section in shallow water carbonate reservoirs, 1200 m horizontal section gravel packing in deep water non consolidated sandstone reservoirs, managed pressure drilling onshore experiences, extended reach onshore wells for offshore reservoir exploitation, including slant rig drilling and open hole gravel packing with synthetic low viscosity fluids. Finally, the hydraulic challenges for the future will be highlighted.