Oil and Gas Terms Beginning with “F” — Page 2

A salt formed when a fatty acid reacts with a metal oxide or hydroxide. Fatty acids and lime, Ca(OH)2, form emulsifiers for oil muds. Fatty acids reacted with sodium hydroxide [NaOH] or potassium hydroxide [KOH] are… Read more →

A salt formed when a fatty acid reacts with a metal oxide or hydroxide. Fatty acids and lime, Ca(OH)2, form emulsifiers for oil muds. Fatty acids reacted with sodium hydroxide [NaOH] or potassium hydroxide [KOH] are… Read more →

What Is a Fault? A fault is a planar or curved fracture in brittle rock across which the two opposing blocks have moved relative to each other, driven by tectonic stress. Fault geometry, displacement magnitude, and… Read more →

A type of structuralhydrocarbontrap in which closure is controlled by the presence of at least one fault surface. Read more →

Ownership of the entire and absolute right or interest to use or exploit a tract of land from the center of the earth to the stars, including the air, surface and minerals. Read more →

[alkali feldspar (K,Na)AlSi3O8][plagioclase feldspar NaAlSi3O8 - CaAl2Si2O8]A group of rock-forming silicate minerals that are essential constituents of igneous rocks and are common in sandstones. Feldspar can weather… Read more →

Pertaining to minerals or igneous rocks composed of minerals such as quartz and feldspar that are relatively light in color and density. The word comes from the terms feldspar and silica. Granite is a felsic igneous… Read more →

A graphical display of three-dimensional data and interpretations in two-dimensional perspective view. Geologic cross sections can be displayed in a network to form a fence diagram. Stratigraphic changes can be… Read more →

A corrosion by-product [FeS2] formed when hydrogen sulfide [H2S] contacts the iron [Fe] present in steel.Ferrous sulfide is a black crystalline material at bottomhole conditions. However, when it contacts air at… Read more →

A type of lost circulation material that is long, slender and flexible and occurs in various sizes and lengths of fiber. Fiber LCM is added to mud and placed downhole to help retard mud loss into fractures or highly… Read more →

A type of lost circulation material that is long, slender and flexible and occurs in various sizes and lengths of fiber. Fiber LCM is added to mud and placed downhole to help retard mud loss into fractures or highly… Read more →

The surface area above a subsurface hydrocarbon accumulation. Read more →

A magnetic tape containing data recorded in the field, abbreviated FT. Read more →

A cement system used to provide zonal isolation across generally nonproductive zones located above the zones of interest. The fill cement is also called the lead cement. Read more →

A pipe-shaped housing that protects the firing head of a tubing-conveyed perforating gun. It is used to accommodate or deflect debris that might fall toward the firing head while running into the hole or while on depth… Read more →

To remove undesirable portions of data during seismicprocessing to increase the signal-to-noise ratio of seismic data. Filtering can eliminate certain frequencies, amplitudes or other information. Read more →

What Is Filter Cake in Drilling? A filter cake is a layer of solid particles deposited on the borehole wall when drilling fluid filtrate is forced into permeable formation by differential pressure between the wellbore… Read more →

A subjective description of a filtercake, especially its toughness, slickness and hardness. A mud engineer makes these observations, which are recorded on the mud report along with filtrate volume and cake thickness.… Read more →

A measurement of the thickness of the filtercake, usually recorded in 32nds-inch. Under dynamic conditions, filter-cake thickness depends on rate of deposition versus erosion caused by fluid circulation and mechanical… Read more →

(noun) The plural of filter medium. The porous materials — including woven screens, sintered metals, gravel packs, sand, diatomaceous earth, and synthetic membranes — through which a fluid is passed to remove suspended… Read more →

A permeable material used in a filtration device through which filtrate passes and on which the filter cake is deposited, commonly a specifically designed filter paper or permeable disk used in a static filter press… Read more →

A pressurized cell, fitted with a filter medium, used for evaluating filtration characteristics of a drilling fluid while it is either static or stirred (to simulate circulation) in the test cell. Generally, either… Read more →

A subjective description of a filter cake, especially its toughness, slickness and hardness. A mud engineer makes these observations, which are recorded on the mud report along with filtrate volume and cake thickness.… Read more →

A measurement of the thickness of the filter cake, usually recorded in 32nds-inch. Under dynamic conditions, filter-cake thickness depends on rate of deposition versus erosion caused by fluid circulation and mechanical… Read more →

A completion or workover fluid that has been treated to remove debris and fine particles that may cause near-wellbore damage if allowed to enter the reservoirformation. Read more →

Devices for selecting or excluding data from a data stream or data set. These devices may be physical (for example to tune an electrical circuit to a particular frequency) or a mathematical algorithm. Mathematical… Read more →

The liquid that passes through a filter cake from a slurry held against the filter medium, driven by differential pressure. Dynamic or static filtration can produce a filtrate. Read more →

The downward vertical movement of filtrate with time after invasion. In hydrocarbon zones, the filtrate is heavier than the formation fluid. Therefore, in a vertical well, gravity causes the filtrate to sink to the… Read more →

A chemical or isotopic marker that is uniformly distributed in the continuous phase of a drilling, coring, drill-in or completion fluid and used to later identify the filtrate in cores or in fluids sampled from… Read more →

The volume of mudfiltrate measured after 30 minutes in API static filtration tests. The volume and cake thickness are the two data points in the test. Read more →