What is a gravel pack?
Gravel packing is a sand-control method used to prevent the production of formation sand. Gravel packing is used in conjunction with hydraulic fracturing, but at much lower pressures. Formation sand is produced from the breakdown of formations where wells are located.
What is open hole gravel pack?
1. n. [Well Completions] A type of sand-control completion in which the gravel pack screen is packed off in an openhole section with no casing or liner to support the producing formation. The openhole interval is often prepared by underreaming a section of reservoir below the last casing shoe.
What is well gravel?
Well Pack gravel is used for deep bed in-ground wells to form a barrier between the screens and the natural deposit of the land, which in turn, allows for the well to provide very clean water. Other applications can include dewatering well and monitoring wells.
What is a barefoot completion?
1. n. [Well Completions] A well completion that has no casing or liner set across the reservoir formation, allowing the produced fluids to flow directly into the wellbore. This type of completion suffers the major disadvantage that the sandface is unsupported and may collapse.
How deep should the gravel in a well?
As with most shallow wells, the stone-packed well is installed into the ground water table by digging a hole as deep as possible with an excavator (usually about 20 feet) and placing 6″ to 12″ of crushed stone in the bottom.
What should be the perforation hole size for gravel packing?
The perforation hole size for gravel packing should be a minimum of 0.75 in. Gravel packing is a sand control method.
What is sand control in oil and gas?
Sand control is a method to control sand production into a wellbore. Sand production can lead to several issues such as production impairment due to sand plugging, erosion to completion string and down hole tool, damage surface facilities as separator, piping, etc.
What is a water well screen?
A well screen is a filtering device that serves as the intake portion of wells constructed in unconsolidated or semi-consolidated aquifers. The screen permits water to enter the well from the saturated aquifer, prevents sediment from entering the well, and serves structurally to support the aquifer material.
What is sand Point well?
A driven point well – sometimes called a sand point – is a small diameter well made by connecting lengths of 1-1/4” or 2” diameter steel pipe together with threaded couplings. Installation of a driven point well begins by driving the point and a single length of pipe into the ground.
What is cased hole completion?
Cased hole completion Description This method involves running casing down through the production zone, and then cementing it in place. This principally requires preparing the bottom of the hole to the required specifications, running production casing and then making connection between the well bore and the formation.
What is open hole?
Definition of open hole : an oil well or portion of an oil well that has not been cased.