- 行业: Oil & gas
- Number of terms: 8814
- Number of blossaries: 0
- Company Profile:
A grant extended by a government to permit a company to explore for and produce oil, gas or mineral resources within a strictly defined geographic area, typically beneath government-owned lands or lands in which the government owns the rights to produce oil, gas or minerals. The grant is usually awarded to a company in consideration for some type of bonus or license fee and royalty or production sharing provided to the host government for a specified period of time.
Industry:Oil & gas
A graphical representation of the degree of agreement between segments of curves being correlated between different wells. The degree of lag (required shift), the amplitude of the peaks and the shapes of the peaks are parameters used to calculate the match in a correlogram.
Industry:Oil & gas
A graphical representation of harmonic information in a data set. Often taken from Fourier analysis of the data, this representation is used to determine periodicities in petrophysical data and in geological depositional sequences.
Industry:Oil & gas
A graph that shows the effects of environmental factors on the ideal response of a measurement. The name comes from the departure of the actual response from the ideal. The term is used most commonly in relation to the effect of hole size, mud resistivity, bed thickness, invasion and other factors on electrical logs.
Industry:Oil & gas
A graph in which data points are plotted but not connected. The x and y axes of the scattergram represent the two variables being plotted. Sometimes, the data points are coded by using color or symbols to represent a third dimension.
Industry:Oil & gas
A geostatistical tool that yields a quantitative measure of the error in a map. It is performed when multiple maps have been created using kriging or cokriging and where each map has similar mean and variance as the control points, has approximately the same semivariogram, and approximately honors the control points. If guide data are used, the average of the conditional simulation images is the kriging with external drift (KED) solution. <br>In general, conditional simulation maps contain more detail than maps produced by kriging or KED, but require much more effort to produce.
Industry:Oil & gas
A generic term used to describe equipment attached to, and run with, the casing string. Commonly used casing hardware includes guide or float shoes, float or landing collars, centralizers, scratchers and cement baskets. More specialized casing hardware may include stage-cementing collars, differential fill-up equipment and other specialized equipment to help achieve successful placement and cementation of the casing string.
Industry:Oil & gas
A generic term given to the hydraulic power pack and accumulators used to control the blowout preventers on a drilling or workover rig.
Industry:Oil & gas
A generic term used in a number of contexts but most commonly to describe any fluid produced from a wellbore that is not a treatment fluid. The characteristics and phase composition of a produced fluid vary and use of the term often implies an inexact or unknown composition.
Industry:Oil & gas
A general term for injection processes that use special chemical solutions. Micellar, alkaline and soap-like substances are used to reduce surface tension between oil and water in the reservoir, whereas polymers such as polyacrylamide or polysaccharide are employed to improve sweep efficiency. The chemical solutions are pumped through specially distributed injection wells to mobilize oil left behind after primary or secondary recovery. Chemical flooding is a major component of enhanced oil recovery processes and can be subdivided into micellar-polymer flooding and alkaline flooding. <br><br>The general procedure of a chemical flooding includes a preflush (low-salinity water), a chemical solution (micellar or alkaline), a mobility buffer and, finally, a driving fluid (water), which displaces the chemicals and the resulting oil bank to production wells. The preflush and the mobility buffer are optional fluids.
Industry:Oil & gas
