The Enhancement of Horizontal Water Injection Well by Integrating Single Well With Full Field Dynamic Model in Carbonate Reservoir: Case Study from North Kuwait

Abstract

Abstract Water injection using horizontal wells has started since 2012 in North Kuwait carbonate reservoirs. The objective of this work is to integrate a detailed steady-state single well model with a dynamic reservoir model along to improve the permeability distribution inside the dynamic model along the horizontal section of the well. The workflow starts first by building a well model and quantifying the injectivity profile along the horizontal section from the actual wellhead injection pressure and dynamic reservoir parameters. Then the ILT (Injection Logging Tool) data is used by the well modeling simulator to calculate permeability distribution along the horizontal section of the well resulting in the measured outflow profile. The final step is to export the permeability multipliers along the open hole horizontal section of the well into the dynamic model to improve the dynamic model results at the well level. This workflow was examined on one injection well from the North Kuwait Carbonate formation and shows improvement in well bottom hole injection pressure, reservoir pressure, well injectivity index and water injection rates distribution along the horizontal Openhole section from the dynamic model and better history match. The coupling of a single-well advanced ILT interpretation with the field-scale dynamic model is considered as a novel approach that improves the dynamic modeling construction on a well-scale level. Instead of a classical approach where reservoir properties are used only to calculate outflow into the well an inverse problem is solved: calculate reservoir properties from a measured outflow profile.