دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a comparable reservoir with many similar characteristics (e.g., lithology, depositional environment, porosity, perm, drive mechanism, produced fluids, etc.) that can be used for behavior projections comparison studies.

n: The diameter of the drilled wellbore. The borehole diameter can change greatly even the same bit due to the change of formation lithology and formation collapse.

n: Schlumberger/Anadrill LWD tool which combines density and neutron porosity in one tool. Useful for gas detection, porosity evaluation, and lithology determination.

n: Schlumberger/Anadrill LWD tool that bombards the formation with fast neutron. Detectors measure the slowed neutrons that are bounced back by Hydrogen atoms. Used to deduce porosity, lithology, clay analysis, and gas detection.

n: laboratory analysis of a core sample to determine porosity, penneability, lithology, fluid content, angle of dip, geological age, and probable productivity of the formation.

n: Refers to the analysis of core in laboratory in order to confirm porosity, permeability, fluid saturation, dip, geologic period, lithology and production capacity of formation.

lab work on a core sample that may yield permeability, porosity, pore size distribution, grain size, density, etc.

n: The shape of core presents helicoid form due to heterogeneous bit load, metamorphic lithology and long term drilling in core drilling.

the change in density with increasing depth is often a result of compaction. Age, lithology and porosity modification are also factors.

n: a sudden increase in the drill bits rate of penetration. It sometimes indicates that the bit has penetrated a highpressure zone and thus warns of the possibility of a kick.

n: a phenomenon of the drilling speed abrupt changes when the formation characteristics

change

a sudden increase in the ROP (rate of penetration) while drilling. May indicate a higher pressure formation, a change in lithology, a naturally fractured zone, or a poorly consolidated zone.

n: the analysis of subsurface formation characteristics, such as lithology, porosity, permeability, and saturation, by indirect methods such as wireline well logging or by direct methods such as mud logging and core analysis.

the analysis of formation character or properties, usually by remote logs.

n: schlumberger wireline tool that measures the density of the formation and also gives short and long spaced photoelectric effect measurements. Can deduce lithology and porosity. A caliper is also given.