- Отрасли: Oil & gas
- Number of terms: 8814
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Методы регрессии, которые найти связи между двумя или более переменных, которые имеют сложные отношения (нелинейного). Пористости и проницаемости отношения зачастую этой формы в породах, которые имеют несколько типов пористость (первичный, Межкристаллитная, перелом или vugular пористость, например) или несколько типов цемента и другие переменные, которые влияют на проницаемость.
Industry:Oil & gas
Ссылаясь на поток из двух несмешивающихся жидкостей, нефти и воды, нефти и газа, или газа и воды.
Industry:Oil & gas
Referring to the description of different regimes for the simultaneous flow of gas and liquid in vertical pipes introduced by Y. Taitel and A. Dukler in 1980. The results are shown in the form a crossplot or map with the superficial gas velocity, v<sub>gs</sub>, on the x-axis and the superficial liquid velocity, v<sub>ls</sub>, on the y-axis. Different maps are constructed for different pipe sizes and fluid properties. The Taitel-Dukler map defines the transition between different flow regimes more closely than other models. Taitel and Dukler also described flow transitions in horizontal pipes. <br><br>Reference:<br>Taitel Y, Barnea D and Dukler AE: 鈥淢odelling Flow Pattern Transitions for Steady Upward Gas-Liquid Flow in Vertical Tubes,鈥?AIChE Journal 26, no. 6 (May 1980): 345-354.
Industry:Oil & gas
Ссылаясь на тип обычных электрических журнала в котором излучающих ток и ток возвращение электродов (A и B) размещаются близко друг к другу на скважинных приборов, измерения электрода (М) несколько метров и возвращения мера (N) далеко. Этот механизм является чувствительным к потенциальный градиент между A и B. Расстояние определяется расстояние от М до средней точки между А и б. Наиболее распространенными расстояние составляет 18 метров, 8 дюймов (5. 7 m). Боковые дает острее ответ на границы кровати чем нормальный, но также вводит несколько артефактов, которые могут дать результаты заблуждение.
Industry:Oil & gas
Referring to a log of porosity based on the effect of the formation on fast neutrons emitted by a source. Hydrogen has by far the biggest effect in slowing down and capturing neutrons. Since hydrogen is found mainly in the pore fluids, the neutron porosity log responds principally to porosity. However, the matrix and the type of fluid also have an effect. The log is calibrated to read the correct porosity assuming that the pores are filled with fresh water and for a given matrix (limestone, sandstone or dolomite). It is presented in units of porosity (vol/vol or p. U. ) for the matrix chosen. Older logs were presented in counts per second or API units. The depth of investigation is several inches, so that the log reads mainly in the flushed zone. <br><br>The neutron porosity log is strongly affected by clay and gas. Hydrogen occurs in clays and hydrated minerals as well as pore fluids. Gas has a low hydrogen density, so that gas zones have a very low apparent porosity. The measurement is based on either thermal or epithermal neutron detection. Thermal neutrons have about the same energy as the surrounding matter, typically less than 0. 4 eV, while epithermal neutrons have higher energy, between about 0. 4 and 10 eV. Being a statistical measurement, the precision is greatest at high count rates, which in this case occurs at low porosity. <br><br>Neutron porosity logs were introduced in the early 1940s. The first tools were known as neutron-gamma tools, since the detector measured the gamma rays emitted on capture. Neutron-neutron tools, using a thermal neutron detector were introduced in about 1950.
Industry:Oil & gas
Ссылаясь на жидкость с нескольких различных несмешивающихся жидкостей (масла, воды или газа).
Industry:Oil & gas
Ссылаясь на поток или другие явления с только одним компонентом, как правило, масло, вода или газ.
Industry:Oil & gas
Давление на трубы в колодец, как измеряется на устье скважины.
Industry:Oil & gas
Давление зарегистрированы на оборудование или устройства, когда жидкость проходит через.
Industry:Oil & gas
Predictable variation of a property of a material with the direction in which it is measured, which can occur at all scales. For a crystal of a mineral, variation in physical properties observed in different directions is anisotropy. In rocks, variation in seismic velocity measured parallel or perpendicular to bedding surfaces is a form of anisotropy. <br><br>Often found where platy minerals such as micas and clays align parallel to depositional bedding as sediments are compacted, anisotropy is common in shales.
Industry:Oil & gas
