The Petroleum Production System - Wellbore09 Nov 2021
This material is currently in Alpha stage. If you notice any errata, lack of proper reference, misspelling, etc. Kindly send a tweet to @aunnaemeka. I do not make any warranty, express or implied, or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, or process disclosed, or represent that its use would not infringe privately owned rights
The wellbore is a hole drilled to a subsurface formation; in the case of oil and gas production, an assumed reservoir.
The wellbore’s contribution in the petroleum production system are:
- It provides a means of fluid flow from the reservoir to the surface
- The wellbore radius determines the maximum size of casing, and other subsurface equipments
- The wellbore radius affects the flow/production rate
- The wellbore radius through the sandface area affects the flowing wellbore pressure 1
Problem Areas and Solutions
- Wellbore instability i.e. wellbore closure, enlargement, fracturing, and collapse. Common approaches to mitigate this are 2
- Use of established field standards and practices
- Conducting wellbore-stability analysis
Up next, we will examine the casing.