Oil and Gas Terms Beginning with “B” — Page 4

The term ball-operated describes any downhole tool, mechanism, or completion system that is activated by dropping or pumping a ball from surface through the tubing string until it lands on a corresponding tapered seat… Read more →

A ball sealer is a small sphere, typically manufactured from rubber, nylon, or epoxy-coated composite, that is pumped downhole with treatment fluid to mechanically plug individual perforations in a cased wellbore. When… Read more →

Ball seat sizing sequences in Western Canada Sedimentary Basin multistage hydraulic fracturing completions govern the order in which individual fracture stages are isolated and stimulated along a horizontal wellbore… Read more →

Ballout is the condition that occurs during a hydraulic fracturing or acid stimulation treatment that uses ball sealers for diversion, at the moment when every open perforation capable of accepting treatment fluid has… Read more →

In geophysics and oilfield signal processing, a band is a contiguous range of frequencies within the acoustic or electromagnetic spectrum that is characterised by some shared property, such as being generated by the… Read more →

A band-limited function is a mathematical function or time series whose spectral energy is confined to a finite range of frequencies, bounded below by a low-frequency cutoff and above by a high-frequency cutoff. Outside… Read more →

A band-pass filter is a signal-processing operator that transmits frequencies within a defined range (the passband) while attenuating all frequencies below the low-cut corner frequency and above the high-cut corner… Read more →

A band-reject filter is a signal-processing operator that attenuates a defined range of frequencies (the stopband) while transmitting all frequencies outside that range with minimal change in amplitude or phase. It is… Read more →

Band-limited function in digital well log data processing refers to the spectral constraint inherent in wireline and logging-while-drilling formation evaluation measurements, where the physical response of each sensor… Read more →

Band-pass filter design in measurement-while-drilling mud-pulse telemetry processing governs the ability of the surface data acquisition system to extract formation evaluation and directional survey data transmitted by… Read more →

Band-reject filtering of downhole drilling vibration sensor data removes the discrete-frequency interference that contaminates accelerometer, strain gauge, and shock sensor recordings in measurement-while-drilling and… Read more →

Bank firing is a perforating technique in which multiple perforating guns are arranged in a linked configuration called a bank and detonated simultaneously or in a programmed sequence across a defined completion… Read more →

In drilling and well completions, the term barefoot describes a borehole or a section of a wellbore that has been drilled but not cased, not lined with a perforated or slotted liner, and not screened: it is exposed open… Read more →

A barefoot completion is a well production architecture in which the reservoir interval is intentionally left as open, uncased, uncemented, and unperforated borehole throughout the producing life of the well. In a… Read more →

Barite (barium sulfate, BaSO 4 ) is a dense, naturally occurring mineral used throughout the global oil and gas industry as the primary weighting agent in drilling fluid systems. Its combination of high specific gravity… Read more →

A barite plug is a temporary wellbore isolation barrier formed by pumping a dense, high-solids slurry of barite (barium sulfate, BaSO 4 ) down the drill string or work string and allowing the heavy particles to settle… Read more →

A barrel equivalent , universally abbreviated as BOE (barrel of oil equivalent), is a unit of measurement that expresses different hydrocarbon commodities in terms of a single reference volume: one barrel (42 US… Read more →

A barrel pump (also called a sucker-rod pump, downhole pump, or rod pump) is a positive-displacement reciprocating pump installed near the bottom of the production tubing string in a sucker-rod beam-pump artificial lift… Read more →

Barrels of liquid per day , abbreviated BLPD , is the standard production rate measurement expressing the total volume of all liquids produced from a well, a group of wells, or an entire field over a 24-hour calendar… Read more →

Barrels of oil per day (BOPD) is the standard unit of measurement used across the global petroleum industry to express the rate at which crude oil is produced, transported, refined, or consumed over a 24-hour period.… Read more →

Barrels of water per day (BWPD) is the standard industry unit for measuring the volume of water produced alongside oil and gas from a well or field over a 24-hour period. One barrel equals 42 US gallons (approximately… Read more →

Baryte (also spelled barite in North American usage) is a naturally occurring barium sulfate mineral with the chemical formula BaSO4 and a specific gravity of 4.20 to 4.50, making it one of the densest non-metallic… Read more →

A base log is the original, unprocessed wireline log run in a wellbore during or immediately after drilling, serving as the primary reference record for formation evaluation, reservoir characterisation, and well-to-well… Read more →

A base map in oil and gas is the foundational geographic reference layer upon which all geological, geophysical, engineering, and operational data is plotted, allowing diverse datasets to be viewed together in a common… Read more →

The base of weathering (BOW) is the subsurface boundary that separates the near-surface low-velocity zone, in which rocks and sediments have been physically, chemically, or biologically broken down, from the… Read more →

A base slurry is the core cement mixture that forms the starting formulation in well cementing design, consisting of Portland-class oilfield cement, mix water, and a minimum set of chemical additives blended to produce… Read more →

A base station in oil and gas operations serves two distinct but equally important roles: a fixed, precisely surveyed GNSS (Global Navigation Satellite System) reference point that transmits differential correction… Read more →

A baseline in oil and gas operations is the documented reference state of a system, environment, or process measured before a significant activity begins, against which subsequent measurements are compared to detect and… Read more →

In petroleum geology, basement refers to the rock sequence below which economically significant hydrocarbon reservoirs are not expected to be found under current exploration and production technology and economics. It… Read more →

A sedimentary basin is a low-lying region of Earth's crust in which sediments accumulate over geological time, forming the essential architectural setting for petroleum systems. Basins originate through tectonic… Read more →