دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a natural cavity in the earths crust that is large enough to permit human entry. Commonly formed in limestone by groundwater leaching. Compare vug.

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: a high rate of flow from a newly drilled well.

the early, higher rate production that comes from the larger pores, fractures and vugs that empty quickly. Delivers a small, high rate flow every time the well is shut-in (recharges) and is brought back on line.

n: a stratum of rock that contains large void spaces, i.e., a cavernous or vuggy formation.

n: a rock contains large holes.

n: an opening or space within a rock or mass of rocks, usually small and often filled with some fluid (water, oil, gas, or all three). Compare vug.

n: an opening within a rock;is often filled with formation fluids.

the opening within the rock. Interconnected porosity is linked together and results in permeability.

n: porosity created in a formation after it has formed, because of dissolution or stress distortion taking place naturally, or because of treatment by acid or injection of coarse sand.

non intergranular porosity such as fractures, vugs, etc. that may contribute sharply to permeability but may not significantly raise the porosity level.

n: 1. a cavity in a rock. 2. a small cavern, larger than a pore but too small to contain a person. Typically found in limestone subject to groundwater leaching.

a large open pore feature. May be associated with chemical dissolution of part of the matrix over geologic time.

n: a rock formation that contains openings (vugs). See vug.

n: secondary rock porosity formed by the dissolving of the more soluble portions of a rock in waters containing carbonic or other acids.

n: see vuggy formation.