Oilfield Terminology & Definitions.
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Reservoir Management & Improved Recovery

Reservoir management involves monitoring and adjusting production strategies to maintain pressure, optimize fluid flow, and extend field life. Improved recovery techniques such as water flooding, gas injection, and enhanced oil recovery increase the amount of extractable hydrocarbons.

  • Alkaline Flooding
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    Alkaline Flooding (also known as caustic flooding or alkaline waterflooding) is a chemical enhanced oil recovery (EOR) method in which a high-pH solution—typically sodium hydroxide…

  • Aquifer Support
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    Aquifer support is a natural reservoir drive mechanism where an adjacent or underlying water-bearing formation (aquifer) expands and provides pressure maintenance to a hydrocarbon reservoir…

  • Areal Sweep Efficiency
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    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…

  • Capillary Number
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    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…

  • Chemical Flooding
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    Chemical flooding is a tertiary enhanced oil recovery (EOR) method that involves injecting a carefully formulated chemical solution into an oil reservoir to mobilize and…

  • Core Analysis
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    Core analysis is the laboratory-based examination of cylindrical rock samples, known as cores, obtained from subsurface hydrocarbon reservoirs. This fundamental process provides direct measurements of…

  • Cyclic Steam Stimulation (CSS)
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    Cyclic Steam Stimulation (CSS), also widely known as the “huff and puff” method, is a mature thermal enhanced oil recovery (EOR) technique primarily applied to…

  • Displacement Efficiency
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    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…

  • Enhanced Oil Recovery (EOR)
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    Enhanced Oil Recovery (EOR), also known as tertiary recovery, refers to advanced techniques used to extract additional crude oil from a reservoir after primary and…

  • EOR Screening
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    EOR Screening (Enhanced Oil Recovery Screening) is the systematic, multi-stage process of evaluating and selecting the most technically and economically viable enhanced oil recovery (EOR)…

  • Field Development Plan (FDP)
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    A Field Development Plan (FDP) is a comprehensive, integrated document that outlines the strategy, schedule, and economics for developing an oil or gas field from…

  • Formation Volume Factor (FVF)
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    The Formation Volume Factor (FVF) is a critical property in reservoir engineering that describes the change in volume that a reservoir fluid undergoes when it…