Oil & Gas Terms in Category F

Fracture acidizing

Creating a fracture in a carbonate and etching the face of the fracture to preserve flow capacity down the fracture.

Flare gas

1.

Gas or vapor that is flared.

2.

Unwanted natural gas that is disposed of by burning as it is released from an oil field.

Fast formation

A formation where the velocity of the compressional wave traveling through the borehole fluid is less than the velocity of the shear wave through the surrounding formation.

In such conditions a shear head wave is generated, so that standard techniques based on monopole transducers can be used to measure formation shear velocity.

in hard formations, several normal modes are excited in addition to the stoneley and leaky modes.

see also slow formation.

Flare

A burner on a remote line used for disposal of hydrocarbons during clean-up, emergency shut downs and for disposal of small volume waste streams of mixed gasses that cannot easily or safely be separated.

Fgor

Abbr.

Flowing gas oil ratio.

Fpso

A floating production, storage and offloading vessel (fpso; also called a “unit” and a “system”) is a type of floating tank system used by the offshore oil and gas industry and designed to take all of the oil or gas produced from nearby platforms or templates, process it, and store it until the oil or gas can be offloaded onto a tanker or transported through a pipeline.

see details info about fpso here.

Frozen up

Said of equipment of which the components do not operate freely.

Funnel viscosity

Viscosity as measured by the marsh funnel, based on the number of second it takes for 1,000 cubic centimeters of drilling fluid to flow through the funnel.

Freeze point

The depth in the hole at which the tubing, casing, or drill pipe is stuck.

Friction

Resistance to movement created when two surfaces are in contact.

When friction is present, movement between the surfaces produces heat.

Frost up

Icing of equipment due to the cooling effect of expanding gas.

Friction loss

A reduction in the pressure of a fluid caused by its motion against an enclosed surface (such as a pipe).

As the fluid moves through the pipe, friction between the fluid and the pipe wall and within the fluid itself creates a pressure loss.

The faster the fluid moves, the greater are the losses.

Fluidity

The reciprocal of viscosity.

The measure of rate with which a fluid is continuously deformed by a shearing stress; ease of flowing.

Formation fracture pressure

The point at which a formation will crack from pressure in the wellbore.

Foundation pile

The first casing or conductor string (generally with a diameter of 30 to 36 inches) set when drilling a well from an offshore drilling rig.

It prevents sloughing of the ocean-floor formations and is a structural support for the permanent guide base and the blowout preventers.