دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: Schlumberger wireline tool that measures phase shift and attenuation of a 1100 MHz wave. Used for Hydrocarbon identification independent of formation water salinity, thin bed detection, Hydrocarbon saturation and mobility and to evaluate invaded zones.

n: a rock formation that contains large open spaces, usually resulting from the dissolving of soluble substances by formation waters that may still be present. See vug.

n: A formation having columinous voids, usually the result of dissolving by formation waters which may or may not be still present.

n: low-solids fluid or drilling mud used when a well is being completed. It is selected not only for its ability to control formation pressure, but also for the properties that minimise formation damage.

n: A special drilling mud used when a well is being competed. It is selected not only for its ability to control formation pressure, but also for its properties that minimize formation damage.

a brine, oil or gas based fluid that is used as isolation (kill, separation, inhibition functions, etc.) fluid during the completion of a well. Commonly sea water, NaCl brine, formation water, KCl brine, CaCl2 brine, etc. Oil based fluids are common where

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

formation water.

n: 1. the water originally in place in a formation. See connate water: 2.any water that resides in the pore spaces of a formation.

the connate water.

n: 1. water that has little or no salt dissolved in it.2. underground water, generally located near the surface, that does not contain a large amount of salt and from which most underground drinking water supplies are drawn.3. inland surface water, such as lakes, streams, and ponds, that is not salty.

n: Formation water with low salinity. Water is considered fresh when its low conductivity makes the interpretation of resistivity logs difficult. The salinity at which this becomes important depends on temperature and clay content, among other factors, but i

water with less than about 600 ppm total dissolved solids. Suitable for drinking.

v: 1. to seal the hole against formation fluids by allowing the build up of wall cake.2. to block off the flow of oil into the wellbore.

n: in drilling, to seal the hole off from the formation water or oil by using mud. Applies especially to the undersirable blocking off of the flow of oil from the formation into the well bore. Special care is given to the treatment of drilling fluid to avoid

n: schlumberger wireline tool that uses a neutron induced GR spectroscopy to determine oil saturation in unkown or fresh formation water, borehole oil fraction and sigma.

n: the recording of the resistance of formation water to natural or induced electrical current. The mineral content of subsurface water allows it to conduct electricity. Rock, oil, and gas are poor conductors. Resistivity measurements can be correlated to formation lithology, poros- ity, permeability, and saturation and are very useful in formation evaluation. See electric well log.

n: a kind of logging method in which the resistivity of rock is measured, usually used to evaluate the formation oiliness