What is Casehole?
A cased hole is the part of the wellbore with metal casing and cementing. A cased hole is in contrast to an open hole and is one in which casing has been run and cemented. In a cased hole, casing is run and cement is circulated. A cased hole is the part of the wellbore with metal casing and cementing.
What is cased hole in oil field?
The portion of the wellbore that has had metal casing placed and cemented to protect the openhole from fluids, pressures, wellbore stability problems, or a combination of these. A wellbore lined with a string of casing or liner.
What is slotted liner completion?
Slotted (or preperforated) liner completions are by far the most common completion run in horizontal wells. The primary purpose of the slotted-liner is preventing hole collapse in formations that may tend to cave in after being drilled, or as the formation pressure depletes.
What do completions engineers do?
Completions engineers decide the best way to finish building wells so that oil or gas will flow up from underground. They oversee work to complete the building of wellsa project that might involve the use of tubing, hydraulic fracturing, or pressure-control techniques.
What is Wirelogging?
Wireline logging is the measurement of downhole formation attributes using special tools or equipment lowered into the borehole. Wireline logging is the process of using electric instruments to continuously measure the properties of a formation, in order to make decisions about drilling and production operations.
What is Open hole in drilling?
Open hole completion means that the oil reservoir is completely exposed during completion of a straight or horizontal well. After drilling to the top of the oil reservoir, the intermediate casing is run in and the well is cemented.
Why are oil wells perforated?
Perforation operation is an elemental key step in the process of well completion. It involves creating a flow path between the reservoir and the wellbore for the inflow of the reservoir fluid into the wellbore. During perforation a flow path is created with help of high energy detonation by special shaped charges.
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.
What is petroleum engineering liner?
Liner is a casing string that does not extend back to the wellhead, but is hung from another casing string. Liners are used instead of full casing strings to: Reduce cost. Improve hydraulic performance when drilling deeper.