Questions and Answers
What is the main responsibility of the upper completion?
Well control
Name one component of the Christmas tree (XMT).
Packer
The primary method of closing in a well is provided by the Christmas tree (XMT).
True
Which of the following is a method of lower reservoir completion?
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The difference between vertical and horizontal Christmas trees is primarily in the position of the ______.
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What is required for pressure monitoring in subsea trees?
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What must be rated above the maximum anticipated pressure for the life of the well?
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Match the following components with their roles in well completion:
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Study Notes
Completion Overview
- Completion involves managing well performance and ensuring production control.
- Lower completion includes methods focused on production control, while upper completion deals with well control.
Completion Failure Causes
- Material selection is a critical factor that can lead to completion failure.
Stimulation
- Techniques used to enhance hydrocarbon production from wells.
Lower Completion Equipment
- Various technologies are employed for effective reservoir management.
Upper Completion Equipment
- Key components:
- Christmas Tree (XMT) for flow management and well isolation
- Gas lift mandrels and circulation valves for production optimization
- Downhole safety valves (DHSV) and annulus safety valves (ASV) ensure operational safety.
Christmas Tree (XMT) Functions
- Acts as the main device for closing in a well.
- Provides isolation from adjacent wells and connects flowlines.
- Allows for vertical access necessary for live well interventions.
XMT Positioning
- Installed at the top of the wellhead prior to production commencement.
- Flow control is a primary function of the XMT.
Vertical vs Horizontal XMT
- Vertical XMT: Master valves are in line with the tubing and positioned vertically.
- Horizontal XMT: Master valves are horizontal and positioned away from production/casing bore.
- They vary mainly in valve positioning affecting flow operations.
Subsea vs Platform/Land Wells
- Subsea wells require A annulus access for pressure monitoring, fluid bleed down, and gas lift.
- Dual bore design facilitates this requirement in subsea trees.
Wellhead Configuration
- Wellhead consists of multiple casings (upper, lower) secured within the structure.
- Tubing hanger plays a crucial role in supporting the well.
Installation Sequence of XMT
- Installation sequences differ for vertical and horizontal configurations, impacting operational efficiency and safety protocols.
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Description
Dive into Lecture 2 of Well Completion and Stimulation focusing on the crucial aspects of lower and upper completion. Explore common causes of completion failure, including material selection. This quiz is essential for understanding the foundational concepts in well engineering.
