- 行业: Oil & gas
- Number of terms: 8814
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A quantum-mechanical principle formulated by German physicist Werner Karl Heisenberg. It proposes that measuring either one of two related quantities, such as position and momentum, or energy and time, produces uncertainty in the measurement of the other. The error in measurement of one (for example, position) times the error in measurement of the other (for example, momentum) must be greater or equal to Planck's constant. This principle accounts for bizarre behavior of subatomic particles and implies that we can never know everything exactly.
Industry:Oil & gas
A ram-type blowout preventer used to provide primary pressure control in high-pressure snubbing operations. Stripping rams are used when the wellhead pressure is higher than the limitations of a stripper bowl.
Industry:Oil & gas
A rate, or production volume, sufficient to satisfy project economics.
Industry:Oil & gas
A quantification of the degree of 'goodness' of fit of a regression line to a data set. A value of 0. 5 represents random data with no dependence, and a coefficient of 1. 0 represents a perfect fit with absolute dependence.
Industry:Oil & gas
A qualitative description of the roughness of a borehole wall. Alternatively, the term pertains to a borehole whose diameter changes rapidly with depth. The term usually refers to changes at the scale of logging measurements, a few inches to a few feet, and to the effect this has on logging tool responses. Rugosity can be observed on caliper logs, image logs and by its effect on measurements with a small depth of investigation.
Industry:Oil & gas
A pump that can handle the complete production from a well (oil, natural gas, water and sand, for example) without needing to separate or process the production stream near or at the wellhead. This reduces the cost associated with the surface facilities. <br><br>Using multiphase pumps allows development of remote locations or previously uneconomical fields. Additionally, since the surface equipment, including separators, heater-treaters, dehydrators and pipes, is reduced, the impact on the environment is also reduced. <br><br>Multiphase pumps can handle high gas volumes as well as the slugging and different flow regimes associated with multiphase production. Multiphase pumps include twin-screw pumps, piston pumps and helicoaxial pumps.
Industry:Oil & gas
A provision in an oil, gas and mineral lease that perpetuates a company鈥檚 right to operate a property or concession as long as the property or concession produces a minimum paying quantity of oil or gas. Also abbreviated as HBP.
Industry:Oil & gas
A production logging method that uses a small propeller turned by fluid movement. The number of turns of the propeller can be related to the amount of fluid passing through the instrument. <br><br>These devices are used to determine which of several zones contributes the most to the total production or, in the case of an injection well, which zone is receiving the most injected fluids.
Industry:Oil & gas
A production or injection well that has a lateral or diagonal displacement with respect to the other wells in an injection pattern. The existence of an off-pattern well affects oil recovery and water/oil ratio.
Industry:Oil & gas
