Well

Completion Program

Completion, in petroleum production, is the process of making a well ready for production (or injection). This principally involves preparing the bottom of the hole to the required

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specifications, running in the production tubing and it’s associated down hole tools as well as perforating and stimulating as required. Sometimes, the process of running in and cementing the casing is also included.

Open-hole Completion

Open-hole completions are also termed 'barefoot' completions. In this type of completion the casing is set in place and cemented above the productive interval(s). Further drilling extends the well bore into and/or through the reservoir(s) which is left uncased, hence the term 'Open Hole’.

This completion method is used where it is desirable to expose the whole of the productive interval(s) to the well bore. The rock of the producing formations must be strong or 'consolidated' to prevent breakdown and collapse when in production

We will take a simple well completion for open-hole well to explain the operation steps:

1-The production casing is set on top of production zone before drill the production formation that contains the hydrocarbon fluids, then after casing was cemented, producing formation drilled.

2- The production casing is set above the zone of interest before drilling the zone. The zone is open to the well bore. In this case little expense is generated with perforations log interpretation is not critical. The well can be deepened easily and it is easily converted to screen and liner. However, excessive gas and water production is difficult to control, and may require frequent clean outs. Also the interval cannot be selectively stimulated.

3-After casing and cement the well without production zone, run the hole log tool for checking the cement.

4-According to the pressure of the well, if the reservoir pressure is adequate to give a flow rate fit to the casing is ok, if not install of tubing is performed.

5-Screen is reliable if set in the interval zone for preventing sand particles to the well bore.

6-Preforation is not require to the open hole.

7-Gravel pack is good if set in the interval zone.

8-The production zone is open to the well bore.

9-Set ‘BOP’ to the well.

10-Set the well-head on the top of the well bore,that include X-mass tree and master valve…..& so on.

11-The well head valves must be connected to burn pipe to burn the fluid in burn pit.

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12-The well opened to flow by small choke size for cleanout purpose,the hydrocarbons fluid was burned in the burn pit that far about 300 meters from the well .

13-The burned of hydrocarbons was continued until the well cleaned from from completion fluid or water or residual drill mud,and the well reached stabilized condition.

14-The surface facilites should be establish at surface.

15-Then the well closed and it will be ready to done evaluated test.

16-After that production can be started.

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