Oil and Gas Terms Beginning with “M” — Page 6

A variation of air drilling in which a small amount of water trickles into the wellbore from exposed formations and is carried out of the wellbore by the compressed air used for air drilling. The onset of mist drilling… Read more →

A device used to collect small liquid droplets (moisture or hydrocarbons) from the gas stream before it leaves the separator. The two most common types of mist extractors are wire-mesh pads and vanes. Once the small… Read more →

A multiphase-flow regime, with gas as the continuous phase, in which oil or water exists as very small, approximately homogeneously distributed droplets. Mist flow occurs at high gas velocities. Unless the velocity is… Read more →

A blend of organic and inorganic compounds such as scales, silts or clays. Migrating fines that become oil-wet often become targets for organic deposits, thereby creating a mixed deposit.Mixed deposits are considered a… Read more →

mixed-metal hydroxide1. n. [Drilling Fluids] ID: 2102 A compound containing hydroxide anions in association with two or more metal cations. MMH particles are extremely small and carry multiple positive charges. They can… Read more →

A product similar to mixed-metal hydroxide, but based on silicate chemistry. Read more →

A product similar to mixed-metal hydroxide, but based on silicate chemistry. Read more →

A generic term for several classes of self-contained floatable or floating drilling machines such as jackups, semisubmersibles, and submersibles. Read more →

The ratio of effective permeability to phase viscosity. The overall mobility is a sum of the individual phase viscosities. Well productivity is directly proportional to the product of the mobility and the layer… Read more →

In chemical flooding, a fluid stage, normally water thickened with a polymer, pumped between the micellar or alkaline chemical solution and the final water injection.Mobility buffers are prepared with polyacrylamides or… Read more →

A condition in oil recovery processes whereby the mobility of the injectant is lower than that of the oil or preceding chemical slug, leading to a stable displacement by the injectant. Commonly the injectant is water… Read more →

The mobility of an injectant divided by that of the fluid it is displacing, such as oil. The mobility of the oil is defined ahead of the displacement front while that of the injectant is defined behind the displacement… Read more →

A conceptual, three-dimensional construction of a reservoir or oil and gas field. The model is constructed from incomplete data and much of the interwell space must be estimated from nearby wells or from low vertical… Read more →

The act of constructing a model. Read more →

A type of deliverability test conducted in gas wells to generate a stabilized gas deliverability curve (IPR). This test overcomes the limitation of the isochronal test, which requires long shut-in times to reach the… Read more →

A type of secondary porosity created through the dissolution of a preexisting constituent of a rock, such as a shell, rock fragment or grain. The pore space preserves the shape, or mold, of the dissolved material. Read more →

The mean or expected value of the product formed by multiplying together a set of one or more variates or variables, each to a specified power. Read more →

The small platform that the derrickman stands on when tripping pipe. Read more →

The small platform that the derrickman stands on when tripping pipe. Read more →

The chemical unit from which a polymer is made. Read more →

Describing a type of acoustic transducer that emits or receives energy in all directions. Monopole transducers are used in standard sonic logs, and also in array-sonic logs to record shear and Stoneley waves. Read more →

A hydratable, dispersible claymineral of the smectite group. Montmorillonite is a three-layer, expanding clay with a large surface area and high cation-exchange capacity. Na+ and Ca+2 are the typical exchangeable… Read more →

A relatively permanent, fixed marker used in surveying, such as a concrete block or steel plate, with an inscription of location and elevation. Read more →

The opening in the hull of a drillship or other offshore drilling vessel through which drilling equipment passes. Read more →

A tubular placed at the bottom of the subsurface sucker-rod pump and inside the gas anchor to drive the formation fluid with little or no gas into the pump. Read more →

The member of the rig crew responsible for maintenance of the engines. While all members of the rig crew help with major repairs, the motorman does routine preventive maintenance and minor repairs. Read more →

An opening in the rig floor near the rotary table, but between the rotary table and the vee-door, that enables rapid connections while drilling. The mousehole is usually fitted underneath with a length of casing,… Read more →

The volume of hydrocarbons per unit volume of rock that can be moved on production, measured in volume/volume or porosity units. Typically only primary and secondary production methods are considered when estimating… Read more →

The volume of hydrocarbons per unit volume of rock that have been moved by invasion, measured in volume/volume or porosity units. Moved hydrocarbons are not necessarily the same as moveable hydrocarbons, which are those… Read more →

The procedure in seismic processing that compensates for the effects of the separation between seismic sources and receivers. Read more →