Oil and Gas Terms Beginning with “S” — Page 10

Water that does not contain divalent cations, such as Ca+2, Mg+2 or Fe+2 and is therefore suitable for prehydrating bentonite or polymers. Read more →

Oilfield slang term for rope not made of steel, such as nylon, cotton, or especially standard manila hemp rope. Read more →

(noun) A granular or bead-form hygroscopic material, such as silica gel, activated alumina, or molecular sieves, used in gas processing to adsorb water vapour from a natural gas stream in a dehydration unit, reducing… Read more →

The maximum amount of a substance that will dissolve in a given amount of solvent at a given temperature and pressure, or the degree to which a substance will dissolve in a particular solvent. The solubility of a… Read more →

What Is Solution Gas in Oil and Gas? Solution gas (also called dissolved gas) is natural gas that is dissolved in crude oil under the elevated pressure and temperature conditions of the subsurface reservoir. Like carbon… Read more →

A type of reservoir-drive system in which the energy for the transport and production of reservoir fluids is derived from the gas dissolved in the fluid. As reservoir fluids enter the wellbore, changing pressure… Read more →

A type of reservoir-drive mechanism in which the energy for the transport and production of reservoir fluids is provided by the gas dissolved in the liquid. As reservoir fluids enter the wellbore, changing pressure… Read more →

The section of a logging tool that contains the measurement sensors, as distinct from the cartridge, which contains the electronics and power supplies. Read more →

The measurement of an induction tool in a nonconducting medium before correction. Electronic offsets and coupling within the tool cause a signal in the receivers even in a nonconducting medium such as air. This signal… Read more →

Some authors use the term to describe P-waves in fluids, or as a synonym for seismic or elastic. Read more →

A type of acoustic log that displays traveltime of P-waves versus depth. Sonic logs are typically recorded by pulling a tool on a wireline up the wellbore. The tool emits a soundwave that travels from the source to the… Read more →

The technique for recording a boreholesonic log, in the sense of measurement of any of the acoustic properties in and around the borehole. The standard sonic measurement, based on first motion detection, normally can be… Read more →

An acoustic device that measures the time required for an explosive sound to echo from the annular liquid level in nonflowing wells. The time is proportional to the distance from the surface to the liquid. It is used to… Read more →

The range of sedimentary grain sizes that occurs in sediment or sedimentary rock. The term also refers to the process by which sediments of similar size are naturally segregated during transport and deposition according… Read more →

Contaminated with sulfur or sulfur compounds, especially hydrogen sulfide. Crude oil and gas that are sour typically have an odor of rotten eggs if the concentration of sulfur is low. At high concentrations, sulfur is… Read more →

The corrosion caused by contact with hydrogen sulfide [H2S] dissolved in water.Sour corrosion takes the form of sulfidestresscracking or hydrogen embrittlement. Read more →

A crude oil containing hydrogen sulfide, carbon dioxide or mercaptans. Read more →

What Is Sour Gas? Sour gas is natural gas or associated gas containing hydrogen sulphide (H2S) above a concentration threshold that requires specialised materials, safety systems, and processing before the gas can be… Read more →

A device that provides energy for acquisition of seismic data, such as an air gun, explosive charge or vibrator. Read more →

What Is a Source Rock in Oil and Gas? A source rock is a sedimentary rock unit that contains sufficient organic matter to generate and expel hydrocarbons — oil, gas, or both — when subjected to heat and burial over… Read more →

To assemble components to ensure that all critical length dimensions are met, as is required to ensure that the production tubing can be landed in the wellhead and production packer with the desired weight distribution.… Read more →

A display, also known as the f-k domain, of seismic data by wavenumber versus frequency rather than the intuitive display of location versus time for convenience during seismic processing. Working in the space-frequency… Read more →

A viscous fluid used to aid removal of drilling fluids before a primary cementing operation. The spacer is prepared with specific fluid characteristics, such as viscosity and density, that are engineered to displace the… Read more →

Any liquid used to physically separate one special-purpose liquid from another. Special-purpose liquids are typically prone to contamination, so a spacer fluid compatible with each is used between the two. The most… Read more →

The distance between successive shotpoints. Read more →

An area allotted to a well by regulations or field rules issued by a governmental authority having jurisdiction for the drilling and production of a well. Read more →

The dimensionless ratio of the weight of a material to that of the same volume of water. Most common minerals have specific gravities between 2 and 7. Read more →

The permeability of a porous medium to a specific fluid, when that fluid is the only fluid present. Permeability is defined as a property of the porous medium. However, the permeability measured on samples often depends… Read more →

Pertaining to a spectrum. The spectral content of a wavetrain or wavelet usually refers to its amplitude and phase as a function of frequency. Read more →

A technique for utilizing fractal geometry to produce reservoir descriptions. Read more →