Oil and Gas Terms Beginning with “I” — Page 3
124 terms · Page 3 of 5
The particular arrangement of production and injection wells. The injection pattern for an individual field or part of a field is based on the location of existing wells, reservoir size and shape, cost of new wells and… Read more →
The pressure needed to inject fluid into the formation to pressurize or displace hydrocarbons. Read more →
Any pump used to inject fluid into the reservoir or production system. Injection pumps vary in volume and pressure capacity, from the large injection pumps used in water-injection wells, to much smaller low-volume… Read more →
A procedure conducted to establish the rate and pressure at which fluids can be pumped into the treatment target without fracturing the formation. Most stimulation treatments and remedial repairs, such as… Read more →
Water injected into the reservoir to pressurize and displace hydrocarbons to producing wells. Injection water is also used in water-storage operations in offshore and remote locations with economic and environmental… Read more →
What Is an Injection Well? An injection well is a wellbore used to pump fluids — water, gas, steam, CO₂, or chemical solutions — into a subsurface formation for the purpose of maintaining reservoir pressure, enhancing… Read more →
The testing of wells in which fluid is being injected into the reservoir. The most common type of test is a falloff test, in which injection is halted and the pressure decline is measured as a function of time. The most… Read more →
An in-situ recording in which a material with high neutron-capture cross section is injected into the flowstream of a production or injection well to determine fluid paths and velocities. The material used is normally… Read more →
A procedure conducted to establish the rate and pressure at which fluids can be pumped into the treatment target without fracturing the formation. Most stimulation treatments and remedial repairs, such as… Read more →
One of the principal equipment components of a coiled tubing unit. The injector head incorporates special profiled chain assemblies to grip the coiled tubing string and a hydraulic drive system that provides the… Read more →
A section on a log print that gives the scales of the curves displayed and the depth scale. There usually is an insert at the beginning and end of each interval surveyed. Read more →
A valve in the drillstring that may be used to prevent the well from flowing uncontrollably up the drillstring. Read more →
Inside or inner diameter. Casing, tubing and drillpipe are commonly described in terms of inside diameter and outside diameter (OD). Read more →
A downhole tool on which downhole gauges or instruments that are to be temporarily left in the wellbore are attached. The instrument hanger is run into the wellbore on slickline and set in a completion nipple at the… Read more →
A device made of rubber or polyurethane that has electronic devices. An instrumented pig is run through a pipeline to record irregularities that could represent corrosion. An instrumented pig is also called a smart pig. Read more →
A well equipped with monitoring equipment and completion components that can be adjusted to optimize production, either automatically or with some operator intervention. Read more →
A downhole tool used with a jar to increase the impact force imparted as the jar is fired. Similar in function to an accelerator, intensifiers typically use compressed gas rather than a mechanical spring to store the… Read more →
A property of the interface between two immiscible phases. When the phases are both liquid, it is termed interfacial tension; when one of the phases is air, it is termed surface tension. Interfacial tension is the Gibbs… Read more →
The pressure variation with time recorded in observation wells resulting from changes in rates in production or injection wells. In commercially viable reservoirs, it usually takes considerable time for production at… Read more →
Referring to any particle in the size range 250 to 2000 microns. Read more →
A casing string that is generally set in place after the surface casing and before the production casing. The intermediate casing string provides protection against caving of weak or abnormally pressured formations and… Read more →
A length of pipe used below the surface casing string, but before the productioncasing is run, to isolate one or more zones of the openhole to enable deepening of the well. There may be several intermediate casing… Read more →
An artificial-lift method, used in relatively low-productivity wells, in which the gas-lift system is operated on an intermittent basis to enable the buildup of liquids in the wellbore. Read more →
The excess material formed on the internal surface of a coiled tubing string by the longitudinal weld during manufacture. The internal flash can be removed in some larger sizes of string to make a fullbore string less… Read more →
The discontinuous phase of an emulsion, the dispersed droplets of emulsified fluid. Read more →
A downhole tool used to pull or retrieve temporary plugs or similar equipment. The internal pulling tool engages on the internal surfaces of the item to be retrieved. Read more →
The assignment of values to points intermediate to two data points. Linear interpolation plots values along a straight line between the values of the two nearest data points. Other interpolation techniques involve other… Read more →
In geophysics, analysis of data to generate reasonable models and predictions about the properties and structures of the subsurface. Interpretation of seismic data is the primary concern of geophysicists. Read more →
The gas stored in the pore space of a reservoirrock. Measurement of interstitial gas and adsorbed gas, which is the gas accumulated on the surface of another solid material, such as a grain of reservoir rock, allows… Read more →
Water that occurs naturally within the pores of rock. Water from fluids introduced to a formation through drilling or other interference, such as mud and seawater, does not constitute interstitial water. Interstitial… Read more →