Multi-zone Completion Valve for Gravel Packing Efficiency
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Solution Overview
Problem
Current well service operations for gravel packing and fracturing in deep wells are time-consuming and costly due to the need for multiple trips into the wellbore, which increases the risk of tool loss and reduces the inner diameter, limiting the size of tools that can be introduced, and lacks real-time monitoring capabilities.
Innovation Solution
A multi-zone completion system with a service tool that includes a movable valve for recirculating fluids during gravel packing and a system of gauges and sensors for real-time monitoring of wellbore parameters, allowing for intelligent regulation of the fracturing and gravel packing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple trips are made into the wellbore for gravel packing and fracturing operations, then complete treatment of multiple production intervals can be achieved, but the number of trips increases time consumption and operational cost
Solution Approach 1:
The wellbore is divided into multiple production intervals, each equipped with its own packer and screen assembly. This segmentation allows independent treatment of each zone while using a single service tool, eliminating the need for multiple trips to access different zones.
Solution Approach 2:
The completion string is pre-assembled with multiple packers, screens, and isolation mechanisms before being set in the wellbore. This preliminary configuration enables simultaneous access to multiple production intervals through a single service tool deployment, reducing operational time.
2Reliability
If multiple trips are made into the wellbore, then all production intervals can be treated, but the risk of tool loss increases
Solution Approach 1:
Each production interval is isolated by individual packers that can be set independently. This segmentation contains potential tool failure or loss within specific zones rather than affecting the entire wellbore, reducing the impact of tool loss risks.
Solution Approach 2:
The service tool acts as an intermediary that can be deployed once and used to access multiple production intervals through the pre-assembled completion string. This eliminates repeated tool deployments and retrievals, reducing the risk of tool loss associated with multiple trips.
3Reliability
If multiple trips are made into the wellbore, then complete gravel packing can be achieved, but the inner diameter is reduced restricting tool size
Solution Approach 1:
The completion string with all necessary packers and screens is assembled and set in the wellbore before gravel packing operations begin. This preliminary setup establishes the complete gravel packing configuration in advance, eliminating the need for subsequent trips that would reduce the inner diameter and limit tool size.
4Ease of operation
If conventional single-zone completion systems are used, then simple operations can be performed, but multi-zone treatment requires multiple trips increasing complexity
Solution Approach 1:
The service tool is designed with multi-functionality to access and treat multiple production intervals through a single deployment. It incorporates multiple access points and control mechanisms that enable it to perform operations across different zones without requiring multiple specialized tools or trips, thereby reducing overall operational complexity.
Data Source
AI summary
A completion system includes an outer completion string having at least one sand screen arranged thereabout, one or more control lines extending externally along the outer completion string, a service tool arranged within the outer completion string and having an inner tubing that defines a valve conduit, and a valve arranged within the service tool. The control lines have one or more gauges operatively coupled thereto and arranged adjacent the at least one sand screen. The one or more gauges are configured for real-time monitoring and reporting of well environment parameters. The valve is movable between a first position and a second position. In the first position, fracturing fluid is allowed to circulate through the at least one sand screen and the valve and into the valve conduit. In the second position, the valve prevents the fracturing fluid from entering the valve conduit.