دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: in pipeline construction. the hole drilled as the first step of a directionally drilled river crossing. It establishes a pathway for the pipeline.

n: a small-diameter hole that is later opened up to the required diameter. Sometimes used in directional drilling to control wellbore deviation during kick-off.

a small (sometimes) diameter hole drilled through a pay zone to determine the pay top and bottom or various contacts, before the main well position is selected. May also use a pilot hole to better control influx rate.

n: an auxiliary part (such as a coupling, elbow, tee, or cross) used for connecting lengths of pipe.

n: 1. a temporary containment, usually excavated earth, for wellbore fluids. 2. a mud tank. 3. a reserve pit.

packer integrity test. Pressure testing the tubing/casing annulus to insure isolation.

v: to place cement in or near the bottom of a well to exclude bottom water, to sidetrack, or to produce from a fonna- tion higher in the well. Plugging back can also be accomplished with a mechanical plug set by wireline, tubing, or drill pipe.

n/v: 1 the cement at the bottom of well isolates basal water,. 2 pumping cement at certain depth to side track. 3 sealed off the exhausted reservior underneath , recovery exploring the
top reservior.

to set a plug (usually permanent) in a wellbore, giving a new bottom.

generally salt and/or surfactant materials designed to simulate the effect of potassium chloride in preventing clay swelling. Substitutes may work in the wellbore but generally fail in the formation where severe swelling conditions exist.

n: the force that a fluid (liquid or gas) exerts uniformly in all directions within a vessel, pipe, hole in the ground, and so forth, such as that exerted against the inner wall of a tank or that exerted on the bottom of the wellbore by a fluid. Pressure is expressed in terms of force exerted per unit of area, as pounds per square inch, or in kilopascals.

force per unit area exerted by a fluid.

n: a logarithmic plot of bottornhole buildup pressure versus time. Pressure buildup plots are useful in analyzing formation test data for values used in calculating reservoir permeability, formation damage, radius or investigation during the formation test, reservoir depletion, and permeability barriers and other flow irregularities near the wellbore.

n: 1. the act of preventing the entry of formation fluids into a wellbore. 2. the act of controUing high pressures encountered in a wen.

n: an assembly of pressure-control equipment that enables the running and retrieval of long tool strings on a coiled tubing string in a live wellbore.the deployment system is configured to provide two barriers against well pressure as the tool string is asse

n: a condition in which the pressure at the wellbore is less than the reservoir pressure. Flow of oil from the reservoir to the wellbore occurs because of this pressure differential.