Petropedia Terms beginning with A
- Abandoned Well
- Abandonment
- Abnormal Pressure
- ABS
- Absolute Filter
- Absolute Humidity
- Absolute Permeability
- Absolute Porosity
- Absolute Pressure
- Absolute Temperature
- Absolute Temperature Scale
- Absolute Viscosity
- Absolute Zero
- Absorbent
- Absorption Oil
- Absorption Tower
- Abstract of Title
- Abyssal Plain
- AC
- Accumulator
- Acetic Acid
- Acetic Anhydride
- Acid Fracture
- Acid Gas
- Acoustic Impedance
- Ad Valorem Tax
- Adiabatic Compression
- Adiabatic Expansion
- Adjusted Flow Time
- Adsorbed Gas
- Adsorbent
- Adsorption
- Advection Fog
- Adverse Possession
- Aerobic Bacteria
- AFE
- Afe Number
- AGA
- Aggradational
- Agitator
- Air Cleaner Filter Element
- Air Diving
- Air Drill
- Air Drilling
- Air Hoist
- Air Induction System
- Air Mass
- Air-Cut Mud
- Aliphatic Compound
- Alkali Metals
- Alligator Grab
- Alpha Particle
- Alternating Current (AC)
- Aluminum Bronze
- am
- Ambient Conditions
- Ambient Pressure
- American Bureau of Shipping (ABS)
- American Gas Association (AGA)
- American National Standards Institute (ANSI)
- American Petroleum Institute (API)
- American Society of Mechanical Engineers (ASME)
- Amplitude Modulation (am)
- Anaerobic Bacteria
- Analog Signal
- Anchor Buoy
- Aneroid Barometer
- Angle of Deviation
- Angle of Dip
- Angle Of Incidence
- Angular Misalignment
- Angular Unconformity
- Angular Velocity
- Anhydrite
- Anionic Surfactant
- Anisotropic
- Annealed Glass
- Annular Blowout Preventer (Annular BOP)
- Annular BOP
- Annular Flow
- Annular Gas Flow
- Annular Pressure
- Annular Pressure Responsive (APR)
- Annular Production
- Annular Space
- Annulus
- ANSI
- Anticipated Surface Pressure
- Anticline
- Antifoam Agent
- Antifreeze Poisoning
- Antithetic Fault
- API
- API Gamma Ray Unit
- API Gravity
- API-Certified
- Appraisal
- Appraisal Well
- APR
- Aquifer
- Arctic Submersible Rig
- Array Propagation Resistivity
- Artesian Well
- Artificial Lift
- Artificial Lift Systems
- Artificial Satellite
- ASME
- Asphalt
- Asphalt-Base Oil
- Asphaltenes
- Asphaltic Crude
- Associated Free Gas
- Associated Gas
- Asthenosphere
- Atmospheric Corrosion
- Atmospheric Pressure
- Atom
- Atomic Number
- Atomic Weight
- Attapulgite
- Authority For Expenditure (AFE)
- Automatic Bleeding Valve
- Automatic Drilling Control Unit
- Automatic Tank Gauge
- Autotransformer
- Auxiliary Equipment
- Auxiliary Meter Equipment
- Avogadro's Number
- Axial Compression
- Axial Flow Turbine Meter
- Axial Loading
- Axial Surface
- Azeotrope
- Azimuth
- Azimuthal
