دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

bottom hole shut-in pressure.

The pressure at the bottom of the well. In a producing well the BHP may be the bottom hole flowing pressure or the bottom hole shut-in pressure. In a drilling or workover environment, the BHP is exerted by the column of fluid in the hole.

n: see shut-in pressure. closed stationary tank prover n: see positivevolume prove1:

initial shut-in pressure. Used to isolate the formation fracturing or injection effect from the friction effects.

n: (SIP) the pressure when the well is completely shut in, as noted on a gauge installed on the surface control valves. When drilling is in progress, shut- in pressure should be zero, because the pressure exerted by the drilling fluid should be equal to or greater than the pressure exerted by the formations through which the wellbore passes. On a flowing, producing well, however, shut-in pressure should be above zero.

n: The surface force per unit area exerted at the top of a wellbore when it is closed at either the Christmas tree or the BOP stack. The pressure may be from the formation or an external and intentional source. The SIP may be zero, indicating that any open f

the pressure at a datum when the well is not flowing. The shut in pressure is usually either surface shut-in pressure or bottom hole shut-in pressure.

abbr: shut-in pressure;used in drilling reports.

shut in pressure.

n: the bottomhole shut-in pressure that has been allowed time to reach a steady state.

IADC-UBO term. Geothermal and non-hydrocarbon production. Maximum shut-in pressures are less than UBD equipments operating pressure rating. Catastrophic failure has immediate, serious consequences.

IADC-UBO term. Hydrocarbon production. Maximum shut-in pressures are less than UBD equipments operating pressure rating. Catastrophic failure has immediate, serious consequences.

n: a formation fluid sampling device, actually run on conductor line rather than wireline, that also logs flow and shut-in pressure in rock near the borehole. A spring mechanism holds a pad finnly against the sidewall while a piston creates a vacuum in a test chamber. Formation fluids enter the test chamber through a valve in the pad. A recorder logs the rate at which the test chamber is filled. Fluids may also be drawn to fill a sampling chamber. Wireline formation tests may be done any number of times during one trip in the hole, so they are very useful in formation testing.

a formation fluid sampling device.