Selection of Flow Conduit for Well Completion

Cased hole completions are more versatile and applicable to a broader range of reservoir conditions compared to openhole completions.

Casing, cement, perforating equipment, and additional rig time significantly reduce the overall cost of cased hole completions compared to open-hole.

Improper perforation design or execution can lead to uneven flow distribution and reduced production efficiency in cased hole completions.

Casing hinders direct access to the formation, which can limit data acquisition and reservoir characterization in cased hole completions.

Multilateral completion involves drilling multiple wellbores from a single main wellbore to access different zones or reservoirs.

Twin string dual completion is a type of completion where two separate wells are drilled from a single wellbore.

In multiple zone completion, the lower pay zone will produce through two tubing strings and two casing/tubing annulus packers.

Twin string dual completion involves producing from two pay zones through separate flow paths in the tubing.

Single zone completion is the most common method used for completing multiple pay zones in a well.

In multiple string completion, separate flow from three zones can be achieved using two tubings and two packers.

Optimum tubing size is considered at the design stage for maximum short term flow rate in single zone completion.

Single string dual completion is a method that allows separate production from two different pay zones using two tubing strings.

Multiple string completion generally reduces costs and results in high total production per well.

The smaller tubing size in multiple string completions makes installation easier.

Subsurface safety valves (SSVs) are controlled by hydraulic pressure through a capillary line.

SCSSV is an open valve that does not require continuous hydraulic pressure on the control line to keep it open.

Completion accessories are not essential for customizing completions to meet well and reservoir-specific needs.

Tubing in completions can be used for purposes like production, killing string, and injection of chemicals.