دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

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: The constituents of a clay that provide its plastic properties. These include kaolinite, illite, montmorillonite and vermiculite.

a fibrous form of illite, also described as spider-web illite. The hairs or fibers randomly project into the pore space. In most cases, the clay is not overly reactive with water but the fibers do act as a trap for migrating particles.

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.

typically mixtures of illite and smectite or other clays. These may or may not be water sensitive.