- 行业: Oil & gas
- Number of terms: 8814
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In the original location or position, such as a large outcrop that has not been disturbed by faults or landslides. Tests can be performed in situ in a reservoir to determine its pressure and temperature.
Industry:Oil & gas
In the context of spinner flowmeters, the apparent fluid speed measured by the spinner as the tool is moved up and down the well. The effective velocity is the algebraic sum of the actual fluid velocity and the velocity with which the flowmeter is moving, as determined by cable speed. If the tool moves against the flow, the two velocities are added; if moved with the flow, they are subtracted.
Industry:Oil & gas
In the context of borehole logging, measurements of acoustic signals that are in the hundreds of kilohertz to the low-megahertz range. Such ultrasonic instruments are mostly of the pulse-echo type, and are used in the borehole televiewer, and in various cased-hole devices to determine corrosion and cement-bond quality.
Industry:Oil & gas
In sucker-rod pumping, a situation that occurs when the stroke length at the downhole pump is shorter than the surface stroke length.
Industry:Oil & gas
In sand control operations, the maximum production rate below which the production of solids along with the produced fluid is uniform. When the flow rate exceeds this threshold, the production of sand and fines increases significantly. Sand-production control is important to avoid formation damage, possible casing collapse and deterioration of surface equipment due to drag forces.
Industry:Oil & gas
In matrix stimulation, a characteristic of rock that indicates formation permeability is not reduced when treating fluids and their additives contact the formation minerals or fluids inside the reservoir. <br><br>Compatibility is especially important in sandstone treatments, in which potentially damaging reactions may occur. The treatment fluid should remove existing damage without creating additional damage, such as precipitates or emulsions, through interactions with the formation rock or fluids.
Industry:Oil & gas
In multiphase flow, large bubbles of the lighter phase that form by coalescence of small bubbles under certain conditions of fluid flow. The large bubbles occur during slug flow and plug flow. The term is named after G. I. Taylor. <br><br>Reference:<br>Davies RM and Taylor G: 鈥淭he Mechanics of Large Bubbles Rising Through Liquids and Through Liquids in Tubes,鈥?Proceedings of the Royal Society of London, Series A. 200 (February 22, 1950): 375-390.
Industry:Oil & gas
In hydraulic pumping, the crude oil that is pressurized at surface to energize the bottom pump.
Industry:Oil & gas
In logging while drilling, a mark associated with each measurement indicating when a sample was taken. It is usually presented as a short bar in the depth track. Widely spaced tick marks indicate a low sampling rate. In wireline logging, a tick mark indicates the cumulative volume of some quantity, such as hole volume or traveltime. The term is sometimes spelled tic mark.
Industry:Oil & gas
In cyclic steam injection, the second phase between the steam-injection phase and the production phase. During the soak phase, the well is shut in for several days to allow uniform heat distribution to thin the oil.
Industry:Oil & gas
