This document discusses different types of well completion methods including open hole completion and cased hole completion. Open hole completion involves setting the production casing just above the pay zone and leaving the bottom hole uncased, allowing maximum exposure but inability to isolate zones. Cased hole completion involves cementing and perforating the production casing/liner selectively, allowing isolation of zones but risk of formation damage. Common cased hole methods are liner completions, selective perforations of casing, and cemented production tubing. Flow methods include casing flow, tubing and annulus flow, and single/multiple tubing flows.

1. Introduction to well completion
General Procedure of well completion
Open hole well completion
Cased hole well completion

2. Informal definition:
The high time of the well when engineer and
personnel comes to decide whether to install the
production casing in order to initiate the production at
the surface or it should be abandoned .
Technical Definition:
Well completion means to prepare the well for
production by installing the necessary
equipments into the well in order to allow the safe
and controlled flow of HCS at the surface.

9. In an open hole well completion the production casing is
just set above the pay zone, while the entire deepen bottom
of pay zone is left uncased.

11. •Maximum exposure of pay zone
•Less pressure drawdown during flow
•No formation damage occurs due to cementing
and perforation.
•Less formation damage

12. •Inability to plug off water or gas zones
•Inability to stimulate the separate zones within the
productive zones

13. •For the most common type of well completion today
involves the cased hole completion, in which the
production casing and liner are cemented and
perforated subsequently.

14. •Select the sections of the pay zone we wish to produce
•Stimulate the separate pay zone from the well
•Multiple completion zones

15. •A Liner is installed across the pay zone
•It can be divided into two: Screen Liner and perforated
liner
•Screen Liner : Casing is set above the producing zone and
an uncemented screen and liner assembly is installed
across the pay zone

17. •Casing is set above the producing
zone and a liner assembly is installed
across the pay zone and cemented
in place. The liner is then perforated
selectively for production.

19. •Production casing is cemented through the
producing zone and pay section is selectively
perforated

21. •Production tubing is perforated and cemented

23. •Casing flow: large flow rate no tubing is required, used in middle
east.
•Tubing and Annulus flow: large flow rate flow segregation.
•Tubing flow: Used widely in Malaysia due to safety, may use one
more tubing strings.

24. •Simplest way of completing the well
•In this method well is completed by single zone with single
tubing

25. •In this multiple branches are drilled from a single zone
•It is used to improve productivity from closely spaced target zones.