Predicting and Monitoring Fluid Invasion in Exploratory Drilling

Abstract

Summary This study proposes, through the coupling of a linear filtration formulation (laboratory configuration) and a radial single-phase formulation (wellbore vicinity), to predict fluid-invasion depth-of-drilling fluid filtrate in the reservoir rock. Modeling is validated with linear and radial laboratory tests, as well as with resistivity logs run in offshore wells from Campos basin, offshore Brazil. The proposed methodology is required for optimum drilling-fluid design to be used in the drilling of reservoir sections in both exploratory and developmental wells in Campos basin.