- 行业: Oil & gas
- Number of terms: 8814
- Number of blossaries: 0
- Company Profile:
Describing a waveform or a log that has been recorded by a set of dipole receivers oriented orthogonally (or 90<sup>0</sup> out of line) with a dipole transmitter. In sonic logging, cross-dipole flexural modes are used to determine shear anisotropy together with in-line flexural modes. The data are processed using the Alford rotation.
Industry:Oil & gas
Describing parallel or subparallel, closely-spaced, overlapping or step-like minor structural features in rock, such as faults and tension fractures, that are oblique to the overall structural trend.
Industry:Oil & gas
Describing rocks or sediments containing particles that are silt- or clay-sized, less than 0. 625 mm in size. Most have a high clay-mineral content, and many contain a sufficient percentage of organic material to be considered a source rock for hydrocarbon.
Industry:Oil & gas
Describing a mechanism or system that is actuated by a ball that is dropped or pumped through the tubing string. Once located on a landing seat, the tool mechanism is generally actuated by hydraulic pressure.
Industry:Oil & gas
Describes a bed that maintains its original thickness during deformation. Often pertains to relatively brittle, solid strata that deform by faulting, fracturing or folding, rather than flowing under stress. Incompetent beds are more ductile and tend to flow under stress, so their bed thickness changes more readily during deformation.
Industry:Oil & gas
Crude oil with high viscosity (typically above 10 cp), and high specific gravity. The API classifies heavy oil as crudes with a gravity below 22. 3掳 API. In addition to high viscosity and high specific gravity, heavy oils typically have low hydrogen-to-carbon ratios, high asphaltene, sulfur, nitrogen, and heavy-metal content, as well as higher acid numbers.
Industry:Oil & gas
Debris, dirt, paraffin, oil, mill scale and rust removed from a pipeline when a scraper or a pig is used for cleaning purposes.
Industry:Oil & gas
Crude oil that has a high API gravity, usually more than 40<sup>o</sup>.
Industry:Oil & gas
Crude oil containing asphaltic materials but very little or no paraffin wax. This type of oil is suitable for making gasoline, lubricating oil and asphalt. It is also called asphalt-base crude.
Industry:Oil & gas
