- Industry: Oil & gas
- Number of terms: 8814
- Number of blossaries: 0
- Company Profile:
A chemical additive that alters fluid rheological properties to reduce friction created within the fluid as it flows through small-diameter tubulars or similar restrictions. Generally polymers, or similar friction reducing agents, add viscosity to the fluid, which reduces the turbulence induced as the fluid flows. Reductions in fluid friction of 50 to 60% are possible.
Industry:Oil & gas
A chemical additive for stimulation treatments that is soluble in oil, water and acid-based treatment fluids. Mutual solvents are routinely used in a range of applications, such as removing heavy hydrocarbon deposits, controlling the wettability of contact surfaces before, during or after a treatment, and preventing or breaking emulsions. A commonly used mutual solvent is ethyleneglycolmonobutyl ether, generally known as EGMBE.
Industry:Oil & gas
A check performed at the wellsite to establish whether a logging measurement is functioning properly. Verification is also known as an operational check. The verification may be done before or after the survey and may be presented with the log. Verification is distinct from calibration.
Industry:Oil & gas
A characteristic of a model of a reservoir that may or may not vary with respect to position or with time. Porosity is a petrophysical parameter (or characteristic) that varies with position.
Industry:Oil & gas
A cement-squeeze technique in which the cement slurry is continuously injected until the desired squeeze pressure is achieved. When pumping stops, the final squeeze pressure is monitored. If the pressure falls, additional slurry is squeezed to increase the pressure back to the final squeeze value. This process is repeated until the final squeeze pressure can be sustained.
Industry:Oil & gas
A casing string that is set across the reservoir interval and within which the primary completion components are installed.
Industry:Oil & gas
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 enables the use of drilling fluids of different density necessary for the control of lower formations.
Industry:Oil & gas
A carbohydrate composed of many monosaccharides. Polysaccharides increase the viscosity of the water slug that precedes the final water injection. However, they are not frequently used in chemical flooding operations because they generate numerous by-products that can potentially plug filters or well sandfaces, especially when they contact polyvalent cations or bacteria. <br><br>Polysaccharides are also called biopolymers.
Industry:Oil & gas
A calibrated wheel used to drive the depth recording system in wireline logging. The wheel is pressed against the logging cable as the cable is spooled onto the drum and therefore turns as the cable is run in and out of the borehole. After zeroing the depth on surface, the depth wheel provides the depth input to the recording system. Small errors in calibration and slippage can cause the wheel to introduce systematic errors in the depth recorded. For this reason, the depth is checked and corrected using depth marks. The depth wheel is also referred to as a depth encoder. Modern encoders have two wheels so that slippage can be detected by differences between the two measurements.
Industry:Oil & gas
A calibrated tank that automatically measures the liquid volume passing through it. Measuring tanks are also called metering tanks or dump tanks.
Industry:Oil & gas
