Oil and gas terminology · MLC-0103
Oil and gas terms: S (548)
- Surface interestThe ownership rights to the land itself, including the right to use the surface for farming, ranching, or...
- Surface pipeThe initial string of casing installed in a well, extending from the surface to a depth sufficient to protect...
- Surface pressureThe pressure measured at the wellhead of a producing, injection, or shut-in well. For a flowing well, this is...
- Surface shut-inThe act of closing the wellhead valves to stop the flow of fluids from a well at the surface. This action...
- Surface tensionThe cohesive force that exists at the interface between a liquid and another medium, such as air or another...
- Surface waveA type of seismic wave that travels along the surface of the Earth or along an interface, rather than through...
- Surface-controlled subsurface safety valve (SCSSV)A type of subsurface safety valve that is operated remotely from the surface through a hydraulic control line...
- SurfactantA surface-active agent, typically an organic compound, that reduces the interfacial tension between two...
- Surfactant floodingAn enhanced oil recovery method where a dilute solution of surfactants is injected into a reservoir to reduce...
- Surfactant-alternating gasAn enhanced oil recovery method in which slugs of surfactant solution are injected alternately with slugs of...
- SurgeA transient pressure wave that propagates through a fluid-filled pipeline or system following a rapid change...
- Surge relieverA device specifically designed to mitigate the effects of pressure surges in pipelines by rapidly opening to...
- Surge tankA vessel installed in a fluid flow system to absorb sudden changes in pressure or flow rate, thereby...
- Surrounding bedThe rock formation immediately adjacent to the bed being investigated by a logging tool. The properties of...
- SurveyA systematic acquisition of geophysical data over a specific area to map subsurface geological structures...
- Suspended solidsFinely divided solid particles that are dispersed and carried within a drilling fluid without dissolving...
- SV-waveA shear wave (S-wave) in which the particle motion is perpendicular to the direction of wave propagation and...
- SwThe symbol representing water saturation, which is the fraction or percentage of the pore volume in a rock...
- SwabTo pull a tool or device, often with a sealing element, up the wellbore to create a pressure differential...
- Swab valveThe uppermost valve on a Christmas tree, located above the master valve and below the lubricator. It is used...
- SwageA tool or fitting used to reduce or expand the diameter of a tubular, or to connect two tubulars of different...
- Swaging toolA downhole tool run on wireline or coiled tubing to repair collapsed or dented production tubing. The tool...
- SwampA type of wetland environment characterized by saturated soils or standing water and dominated by woody...
- S-waveA shear wave, which is a type of seismic body wave that propagates through a medium by particle motion...
- Sweep efficiencyA measure of how effectively an injected fluid displaces oil from a reservoir, considering both areal and...
- Sweep pillA viscous fluid slug pumped into the wellbore to clean out debris, cuttings, or other solids that have...
- SweetDescribing crude oil or natural gas with little or no hydrogen sulfide, so that it is neither corrosive nor...
- Sweet corrosionCorrosion that occurs in oil and gas production systems due to the presence of carbon dioxide (CO2) dissolved...
- Sweet crudeCrude oil with a very low sulfur content, typically less than 0.5% by weight. This type of crude is highly...
- Sweet crude oilCrude oil containing very low concentrations of hydrogen sulfide (H2S) and other sulfur compounds, making it...
- Sweet gasNatural gas that contains very low concentrations of hydrogen sulfide (H2S) and carbon dioxide (CO2). The...
- Sweet spotA localized area within a larger hydrocarbon play or reservoir that exhibits superior geological and...
- SweeteningThe process of removing hydrogen sulfide (H2S) and carbon dioxide (CO2) from natural gas or crude oil to meet...
- Swellable packerA downhole sealing device that expands and creates a seal when exposed to wellbore fluids, such as oil...
- Swing check valveA valve that permits fluid flow in only one direction, using a hinged disc that swings open with forward flow...
- SwivelA mechanical device on a drilling rig that hangs from the hook and traveling block, supporting the weight of...
- Swivel flangeA type of pipe flange consisting of a rotating outer ring and a fixed inner hub, allowing the bolt holes to...
- SWRThe abbreviation for synthetic/water ratio, which represents the volumetric proportion of the synthetic oil...
- SynA type of non-aqueous drilling fluid, also known as synthetic-based mud (SBM), where the continuous phase is...
- SynclineA fold in rock layers where the strata dip inward toward a common axis, forming a trough-like structure. The...
- Synthetic dataArtificially generated information created to mimic the statistical properties of real-world data without...
- Synthetic faultA secondary fault that dips in the same direction as the master fault it accompanies, as in a growth-fault...
- Synthetic natural gasA gaseous fuel produced from carbonaceous materials such as coal, biomass, or petroleum feedstocks, designed...
- Synthetic seismogramA one-dimensional model of seismic reflection data generated by convolving a seismic wavelet with a rock's...
- Synthetic seismograms, see Synthetic seismogram
- Synthetic-base fluidA drilling fluid in which the continuous phase is a synthetic hydrocarbon, such as an olefin or paraffin...
- Synthetic-base mudA drilling fluid in which the continuous phase is a synthetic oil, such as an olefin or ester, rather than a...
- Synthetic/brine ratioThe volumetric proportion of the synthetic oil phase to the brine (saltwater) phase in a synthetic-based...
- Synthetic/water ratioThe volumetric ratio of the synthetic liquid phase to the emulsified water or brine phase in a...
- Systematic errorA consistent, repeatable deviation in measurement results from the true value, caused by flaws in the...
- Systems tractA set of contemporaneous depositional systems linked by sediment transport that makes up one part of a...
548 of 4,469 terms in Oil and gas terminology (MLC-0103). Request the full dataset.