What is a lower completion?

What is a lower completion?

Lower completion (downhole completion) This refers to the portion of the well across the production or injection zone. The well designer has many tools and options available to design the lower completion (downhole completion) according to the conditions of the reservoir.

What is open hole well completion?

Open hole completion means that the oil reservoir is completely exposed during completion of a straight or horizontal well. There are two types of procedures for open hole completion. 1. After drilling to the top of the oil reservoir, the intermediate casing is run in and the well is cemented.

What is upper and lower completion?

Depending on the place where the completion is made, oil and gas well completions are divided into lower completion or downhole completion, and upper completion. The lower completion connects the oil and gas formation with the wellbore. The upper completion is the link between the lower completion and the surface.

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 liner completion?

Liner completions are similar to open hole completions in that casing must be set prior to drilling the producing interval. The advantage of a liner completion is that the drilling fluid system can be changed and a nondamaging fluid used to drill the pay interval.

What are the types of well completion?

Completions can be divided into three categories: open hole completions, liner completions, and perforated casing completions. In most wells, conventional single perforated casing completions are used; however, multiple, alternate, or slim hole completions may be used under certain conditions.

What are the different types of well completion?

What is difference between open hole and cased hole?

Open-hole logging refers to logging operations that are performed on a well before the wellbore has been cased and cemented. On the other hand, cased-hole logging involves retrieving logging measurements through the well casing, or the metal piping that is inserted into the well during completion operations.

What is tubing in oil and gas?

Tubing transports the oil and gas from deep in the well to the surface – the third phase of the wellbore. Oil and gas occasionally rise to the surface on their own; usually, pumps are needed to bring the fluids to the surface. Tubing naturally has a smaller diameter than casing, except for the 4 1/2-inch diameter.

What is open hole?

Definition of open hole : an oil well or portion of an oil well that has not been cased.

How many types of completion are there?

What is multiple completion?

1. n. [Well Completions] A single wellbore having tubulars and equipment that enable production from two or more reservoir zones. In most cases, at least two tubing strings will be used to provide the necessary level of control and safety for production fluids.

What is a Drilling bottom hole assembly (BHA)?

The drilling bottom hole assembly (BHA) is one of the components of the Drilling String which is below the Drill Pipes. The most common components of the BHA are Drill Collars, Stabilizers, Shock Absorbs, Jars, Reamers, Heavy Weight Drill Pipe and The Drilling Bit.

What are the different types of completions?

Completions can be divided into three categories: open hole completions, liner completions, and perforated casing completions.

What is the difference between open hole completion and slotted liner completion?

The slotted liner completion is similar to an open hole completion and has all the major advantages and disadvantages discussed for open hole completions. The only difference is that a slotted liner is hung in the open hole interval to minimize sloughing of the formation into the well bore (Figure 1b).

What is the difference between open hole completion and production casing?

In a typical open hole completion, casing is set prior to drilling into the producing interval. A nondamaging fluid can then be used to drill into the pay section. One important disadvantage of an openhole completion is that production casing must be set prior to drilling and logging the reservoir.