Archives: Glossary Terms

Residual Oil Saturation (Sor) is a critical parameter in reservoir management and improved oil recovery. It represents the fraction of pore space in a reservoir…

Relative permeability is a dimensionless, critical parameter in reservoir engineering that describes the ability of a specific fluid (oil, water, or gas) to flow through…

The Capillary Number (often denoted as Nc or Ca) is a dimensionless quantity used in reservoir engineering to describe the relative importance of viscous forces…

Mobility ratio is a dimensionless parameter used in reservoir engineering to describe the ease with which one fluid can move through a porous medium compared…

Displacement Efficiency (Ed) is a fundamental concept in reservoir engineering that quantifies the effectiveness of a displacing fluid (such as water, gas, or chemical) in…

Vertical Sweep Efficiency (VSE), often referred to as vertical conformance, is a dimensionless metric (typically expressed as a percentage) that quantifies how effectively a displacing…

Areal Sweep Efficiency (EA) is a key performance metric used in reservoir management and improved oil recovery (IOR) operations, particularly during waterflooding and gas injection…

Sweep Efficiency is a dimensionless measure of the effectiveness of a displacement process in a petroleum reservoir. It quantifies the fraction of the reservoir volume…

The Voidage Replacement Ratio (VRR) is a critical dimensionless metric used in reservoir management to quantify the balance between the volume of fluids withdrawn from…

Reservoir Pressure Maintenance is a secondary oil recovery technique employed to sustain or increase the reservoir pressure above the bubble point (the pressure at which…

Material balance is a fundamental principle in petroleum reservoir engineering that applies the law of conservation of mass to a reservoir system. It accounts for…

Reservoir simulation is a computerized method used to model and predict the flow of fluids (oil, gas, and water) through a porous rock formation over…