Patricia B. Gusmão is a PhD student at the Institute of GeoEnergy Engineering at Heriot-Watt University. Her research analyses the impact of geochemical reactions on the scale risk, investigating the effect of changes in flow rates, pressure, temperature, and CO2 concentration during water and gas flooding. Beyond that, her research interest includes the impact of residual oil saturation and CO2 partitioning on geochemical reactions and the application of reactive transport modelling for CO2 storage. Patricia has 12 years of experience as a reservoir engineer in Brazil, working with reservoir management, water management, and geochemical modelling in sandstone and carbonate reservoirs in the Campos basin and the Brazilian pre-salt fields. She holds a BSc in Chemical Engineering and an MSc in Chemistry from Rio de Janeiro State University.
Project Title
A sensitivity analysis of the scaling potential in carbonate reservoirs under CO2-WAG Injection
Funding
Petrobras
Supervisors
Prof. Eric Mackay
Prof. Ken Sorbie
Start Date
Sep 2021
Publications
1- Impact of Pressure Variation on Brine Composition and Calcite Saturation Index in Production Wells during CO2-WAG EOR in Carbonate Reservoirs. Tekna Oil Field Chemistry Symposium 2023 · Mar 14, 2023
2- The Impact of Variations in Water and Gas Flow Rates on Scaling Potential of Carbonate Reservoirs Under CO2 -WAG Injection. SPE International Conference on Oilfield Chemistry
3- An Improved Reservoir Understanding of the Impact of Initial Oil Composition and Residual Oil Saturation on Brine Composition and Calcite Scaling During CO2 – WAG EOR in Carbonate Reservoirs
4- Understanding the Impact of Water Injection Rate on Brine Composition and Calcite Scaling in Reactive Carbonate Reservoirs as a Function of Oil Composition and Saturation
Contact
Email: pbg2000@hw.ac.uk
Project Description
This project is a sensitivity study that tests different values of many reservoir properties, such as the timing of water-alternating-gas cycles, flow rate, pressure, temperature, CO2 concentration, and mineralogy, using thermodynamic and reactive transport simulations. The main point is to understand how geochemical reactions during water and gas flooding are affected and how they impact brine composition.
From a geochemical perspective, this study aims to assess the impact of variations in reservoir parameters on the scaling potential of carbonate reservoirs under CO2-WAG injection. It also seeks to indicate the best practices for scale prediction in reactive reservoirs and propose production management strategies to avoid or minimize scale risk in production wells, such as managing water and gas cycles during WAG injection.