Wellbore Intervention Tool for Selective Perforation Remediation
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Solution Overview
Problem
Current technologies lack the ability to selectively optimize and remediate non-performing perforations in cased wellbores, as existing tools are not suitable for cased hole environments and remedial methods are non-selective, affecting the productivity of hydrocarbon production.
Innovation Solution
A conveyed wellbore intervention tool capable of detecting non-performing perforations and performing localized remedial operations using sensors for visual inspection, flow detection, and intervention tools like ultrasonic cleaning, chemical injection, and filter placement, with depth and azimuthal control for precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional remedial methods (bullheading acid, re-perforation, pressure jetting, ultrasound excitation) are used, then productivity may be improved, but the treatment is non-selective and affects the entire completed interval, causing loss of time and resources
Solution Approach 1:
The system enables selective remediation by detecting and treating only non-performing perforations rather than treating the entire completed interval. Sensors identify specific perforations with debris blockage or poor productivity, and intervention tools are positioned to treat only those locations, avoiding unnecessary treatment of performing perforations and reducing operational time.
Solution Approach 2:
The system divides the completed interval into individual perforation segments, allowing independent assessment and treatment of each perforation. By segmenting the treatment approach, the system can apply remedial operations only to specific non-performing perforations rather than treating the entire interval as a single unit.
2Productivity
If conventional remedial methods are used, then productivity may be improved, but the treatment affects the entire completed interval including performing perforations, increasing operational complexity
Solution Approach 1:
The system applies different treatments to different perforations based on their specific conditions. By assessing each perforation individually and applying targeted remediation only where needed, the system simplifies the overall operational complexity compared to blanket treatment of the entire interval.
3Productivity
If no detection tool is used, then the well can be produced, but non-performing perforations cannot be identified, leading to inefficient production
Solution Approach 1:
The system combines multiple detection capabilities (flow sensors, sand sensors, fluid type sensors) and intervention capabilities into a single multi-functional tool. This universal tool can detect various perforation issues and perform multiple types of remedial operations, making the detection and measurement process more efficient and accessible.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables selective and precise remediation of non-performing perforations, improving hydrocarbon production by addressing specific issues such as debris blockage, sand production, and fluid flow imbalances, enhancing wellbore productivity and efficiency.
Implementation Method 1
detonate a shaped charge mounted on the main body of the gun. The shaped charge creates a hole in the adjacent wellbore casing and the formation behind the casing.
Implementation Method 2
detonate a shaped charge mounted on the main body of the gun
Implementation Method 3
ultrasonic cleaning
Data Source
AI summary
The present invention provides a conveyance tool and a tool string having one or more sensors or cameras for detecting the performance of pre-existing perforations in a cased wellbore, and one or more perforation intervention tools mounted on the tool string and capable of performing remedial actions directed at most one perforation and its nearest neighbors or at a single perforation.