- Industry: Oil & gas
- Number of terms: 8814
- Number of blossaries: 0
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A substance added at slow rate to the production fluid stream to prevent corrosion.
Industry:Oil & gas
A structure made up of a number of superposed domains, usually of different size or wavelength. These are used in geostatistical work to describe statistical behaviors on small scales (such as porosity in thin sections) to large scales (such as porosity distributions in reservoirs).
Industry:Oil & gas
A structure constructed around an oil tank to contain the oil in case the tank collapses. The volume or space inside the tank dike should be greater than the volume of the tank. A tank dike is also called a fire wall.
Industry:Oil & gas
A stimulation treatment routinely performed on oil and gas wells in low-permeability reservoirs. Specially engineered fluids are pumped at high pressure and rate into the reservoir interval to be treated, causing a vertical fracture to open. The wings of the fracture extend away from the wellbore in opposing directions according to the natural stresses within the formation. Proppant, such as grains of sand of a particular size, is mixed with the treatment fluid to keep the fracture open when the treatment is complete. Hydraulic fracturing creates high-conductivity communication with a large area of formation and bypasses any damage that may exist in the near-wellbore area.
Industry:Oil & gas
A steel rod that is used to make up the mechanical assembly between the surface and downhole components of a rod pumping system. Sucker rods are 25 to 30 ft (7 to 9 m) long and threaded at each end to enable the downhole components to be run and retrieved easily.
Industry:Oil & gas
A state that a producing well reaches when the flow rate and well pressure are apparently constant for a reasonable period of time, such as a few hours or a day or more. The actual time period is rather arbitrary and depends on the location and the people involved. For shut-in wells, stabilization refers to a reasonably constant pressure. Stabilized pressures are commonly used as starting points for well tests. <br><br>In reality, the time to stabilization at truly constant pressure and rate is infinite. The target stabilization for rigorous testing in gas wells is pseudosteady-state flow, and this may be recognized as the pressure change versus time predicted from formation properties and drainage area size. The onset of radial flow may produce an apparent stabilization that is acceptable for analysis when multirate flow periods are of equal duration.
Industry:Oil & gas
A standard unit of measure of permeability. One darcy describes the permeability of a porous medium through which the passage of one cubic centimeter of fluid having one centipoise of viscosity flowing in one second under a pressure differential of one atmosphere where the porous medium has a cross-sectional area of one square centimeter and a length of one centimeter. A millidarcy (mD) is one thousandth of a darcy and is a commonly used unit for reservoir rocks.
Industry:Oil & gas
A specimen obtained from the bottom part of the tank or lower point in a pipeline.
Industry:Oil & gas
A squeeze-cementing technique involving the application of treatment pressure that is higher than the fracture pressure of the formation. This procedure may be necessary to force the slurry into microcracks or annuli that surround the wellbore. The characteristics of a fracture are dependent on the fluid flow rate when the fracture is initiated; consequently, high-pressure squeeze operations must be conducted with a high degree of control to place the slurry in the desired location.
Industry:Oil & gas
