Geochemical Tools for Reservoir Management: Assessing Reservoir Compartimentalisation and Allocating Production in Commingled Wells

Identifying the lateral and vertical compartments is prerequisite of efficient reservoir development and management (i.e. maximization of production, reduction of Capex and Opex). As such, identifying compositional heterogeneities may become highly profitable for all types of oils and reservoirs. In layered reservoirs, this is crucial for a better calibration of the reservoir models. The Production Logging Tool (PLT) is commonly used to determine the contribution of individual layers in the production of a well. But since the contribution of each layer and therefore the layer-based equation change with time due to the evolution of reservoir characteristics it consequently deserves repeated assessment. Beside its intrinsic cost, PLT acquisition seriously impacts the production and also constitutes a possible industrial risk. Alternative solutions based on fluid sample composition allowing production allocation in commingled wells are therefore of paramount importance.