Electrokinetic Driven Low-Concentration Acid Improved Oil Recovery in Abu Dhabi Tight Carbonate Reservoirs

摘要

Conventional acidizing, though useful in increasing the effective permeability in the near well-bore region, has compatibility and operational issues such as limitation in depth of penetration and HSE issues to handle, transport and injection of high concentration acid into the well. However, the application of electrokinetics (EK) has a number of economic and environmental advantages such as reduced oil viscosity, reduced water-cut, and no depth limitation. This study presents recent research that demonstrates the impact of EK on matrix low-concentration acid stimulation in Abu Dhabi carbonate reservoirs with varying acid concentrations and voltage gradients.