دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the action of earth stresses that results in folding, faulting, shearing, or compression of rocks.

n: The cake formed by cement slurry leaking off free water.

n: The process that cement slurry loses free water at permeable strata or perforated interval due to filtration in or after cement slurry displacement.

n: carcinogens and other hazardous chemicals that cause an adverse effect on a target organ (as defined by the Code of Federal Regulations) that manifests itself after a long period of time following or during repeated contact with the substance.

n: see lacustrine delta. marine delta.

n: The formation water which is released by cuttings changes the resistance and chloride content of drilling fluid because the salinity of formation is different with drilling fluid. Drawing curve of the chloride increment with well depth. It can be a method

n: three-wire connection used in three-phase circuits, resembling the Greek letter delta (A). Used alone or in various combinations with wye connections.

n: A method of examining overflowing or leakage in the wellbore. Acquiring difference of circulating rate by computing the difference of delivery capacity and return flow of pump with electro magnetic current meter.

n: See deltaflow method.

the sonic travel time in microseconds per foot, of a sound wave through the formation. Denser formations (generally better consolidated and cemented) have lower (faster) delta t times.