دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pi: rotational-flow zones that form on alternate sides of a nonstrearnlined body placed in a high-velocity flowing stream.

a dynamic force. Most common is suddenly stopping a traveling casing string. May cause a pipe joint to separate.

abbr: vapor recovery unit.

vapor recovery unit.

variable speed drive.

abbr: vertical support member.

vertical seismic profile> Run in a single wellbore. Helps correlate logs with seismic data.

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.