دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the combining power of a base, or alkali, as measured by the number of equivalents of an acid with which it reacts to form a salt. Any solution that bas a pH greater than 7 is alkaline. See pH.

n: The combining power of a base measured by the maximum number of equivalents of an acid with which it can react to form a salt. In water analysis, it represents the carbonates, bicarbonates, hydroxides and occasionally the borates, silicates and phosphates

typically the Portland, silicate, and/or pozzilin, etc., mixtures used to form a stone-like permanent seal between the pipe and the formation.

n: a rock of precipitated silica whose crystalline structure is not easily discemible and that fractures conchoidally (like glass). Flint, jasper, and chat are forms of chert.

a hard, silicate sedimentary rock. Similar to flint, but with less ordered structure. A cryptocrystalline form of quartz.

n: I. a term used for particles smaller than \1156 millimetre (4 microns) in size, regardless of mineral composition. 2. a group of hydrous aluminum silicate minerals (clay minerals). 3. a sediment of fine clastics.

n: (1) A soft, variously colored earth, commonly hydrous silicates of alumina, formed by the decomposition of feldspar and other aluminum silicates. Clay minerals are essentially insoluble in water but disperse under hydration, grinding, or velocity effects.

a fine grain (<0.00015” or about 4 microns) – finely crystalline silica sheet minerals. Usually of silicate composition. In oil field terms, the most common clays are Smectite (montmorillinite),illite, kaolinite and chlorite. The characteristic for autho

n: One of component of cement. It can increase the intensity of cement gradually in a long time.

n: a group of silicate minerals that includes a wide variety of potassium, sodium, and aluminium silicates. Feldspar makes up about 60 percent of the outer 9.3 miles (15 kilometres) of the earths crust.

a silicate mineral, often modified and sometimes part of the movable particles in a formation.

n: the remains or impressions of a plant or animal of past geological ages that have been preserved in or as rock.

the silicate replaced replica of an animal or plant.

n: a sand that contains considerable quantities of glauconite, a greenish mineral composed of potassium, iron. and silicate, which gives the sand its colour and name.

a byproduct and precipitant of the HF – silica reaction.

n: A group of clay minerals formed during the alteration of silicate minerals such as mica and feldspar and commonly found in marine shales.

a clay type of varying form and composition. Rarely water sensitive. May occur in unusual cases as a fiberous deposit that can act as a particle trap.