Definition - What does Well Completion mean?
Well Completion is the process of making an oil or gas well ready for commercial production. Once the Appraisal of a well is complete, ongoing drilling of the commercial well has to be completed only if the presence of hydrocarbons prove the project to be feasibly viable. During Well Completion process, the borehole is prepared as per the required specifications. Engineers complete the wellbore by running a production tubing deep into the hole along with its associated downhole tools. Sometimes, cementing the casing is also included under this process.
Petropedia explains Well Completion
Well Completion is one of the primary steps before the commencement of production from a reservoir. There are various steps that have to be taken care when converting a drilled well into a producing well. The following steps needs to be performed to make the well complete:
- Casing – Well casing is the primary step in the Well Completion process. It is the process of protecting a wellbore from outside incumbents like water or sand once oil or gas is produced from the well.
- Cementing – The next step is to pump cement slurry and additives into the well to remove existing drilling fluids and fill the space between the casing and actual sides of a drilled well. This process is also known as Well Cementing.
- Perforations – Once casing and cementing is done at the bottom of the wellbore, perforations are created with the help of a perforation gun so that hydrocarbons can enter into the well stream.
- Gravel Pack – Gravel Pack is used to help filtering sand from Crude oil or gas.
- Production tree or Christmas tree – This is the last step in the Well Completion process. A Christmas tree is installed at the wellhead on the surface of the earth to provide surface controls in the flow of oil or gas to the surface of earth.