Asynchronous Frac-to-Frac Valve Systems for Hydrocarbon Recovery
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Solution Overview
Problem
Current methods for recovering hydrocarbons from fractured reservoirs face challenges in efficiently managing fluid injection and production, particularly in preventing fluid breakthrough and optimizing multi-well processes during frac-to-frac operations.
Innovation Solution
The implementation of asynchronous frac-to-frac processes and systems that utilize valves with sliding sleeves and check-valve devices, allowing for remote control between fully open and closed positions, and data-driven operation to manage injection-only and production-only modes, thereby optimizing hydrocarbon recovery from fractured zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional frac-to-frac operations are used with single valves alternating between injection and production, then operational simplicity is maintained, but fluid breakthrough occurs and hydrocarbon recovery efficiency deteriorates
Solution Approach 1:
The wellbore is divided into multiple isolated zones with dedicated injection-only and production-only valves. Each valve controls a specific fractured zone, allowing independent management of injection and production streams. This segmentation prevents fluid breakthrough between zones and enables optimized frac-to-frac operations in each zone simultaneously.
Solution Approach 2:
Different valve configurations are deployed at different locations along the wellbore based on local reservoir characteristics. Injection-only valves are placed in zones requiring pressurization, while production-only valves are placed in zones optimized for hydrocarbon extraction. This localized optimization maximizes recovery efficiency while preventing cross-zone fluid interference.
2Adaptability or versatility
If valves are remotely controlled between fully open and fully closed positions, then operational flexibility and fluid breakthrough prevention are improved, but control system complexity increases
Solution Approach 1:
The valves are designed with dynamic control capability, allowing remote adjustment between fully open and fully closed positions. This dynamic control enables real-time adaptation to changing reservoir conditions, optimization of injection/production rates, and prevention of fluid breakthrough by closing valves in specific zones when needed.
Solution Approach 2:
The remote control system incorporates feedback mechanisms that monitor pressure, flow rates, and valve positions. This feedback enables automated adjustment of valve states to maintain optimal operational conditions, prevent fluid breakthrough, and maximize hydrocarbon recovery while reducing the need for manual intervention.
3Reliability
If check-valve devices are integrated into sliding sleeves, then one-way flow control is achieved to prevent fluid breakthrough, but valve structural complexity increases
Solution Approach 1:
The check-valve device is integrated directly into the sliding sleeve structure, combining the flow control function with the valve body. This merging eliminates the need for separate check-valve components, reduces overall valve complexity, and ensures reliable one-way flow control to prevent fluid breakthrough between injection and production zones.
Solution Approach 2:
The sliding sleeve is designed to perform multiple functions: it acts as both the valve body for opening/closing flow and incorporates the check-valve mechanism for one-way flow control. This multi-functionality reduces the number of separate components needed and simplifies the overall valve structure while maintaining reliable flow control.
4Productivity
If asynchronous injection and production cycles are implemented across multiple zones, then hydrocarbon recovery is optimized, but monitoring and management complexity increases
Solution Approach 1:
The system implements periodic injection and production cycles in different zones asynchronously. While some zones are in injection mode, other zones are in production mode, creating a staggered periodic pattern. This optimizes overall recovery by continuously cycling zones through injection and production phases while maintaining stable reservoir pressure.
Solution Approach 2:
The asynchronous multi-zone operation ensures continuous useful action throughout the wellbore. While individual zones cycle between injection and production, the overall system maintains continuous hydrocarbon recovery by having multiple zones in production mode simultaneously, eliminating downtime and maximizing productivity.
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
This approach enhances hydrocarbon recovery by preventing fluid breakthrough and optimizing the overall multi-well process, allowing for efficient injection and production cycles, thereby improving the overall efficiency of hydrocarbon extraction from fractured reservoirs.
Implementation Method 1
a sliding sleeve mounted within the housing and configured to slide therein, the sliding sleeve comprising a check valve device for alignment with the port of the housing upon shifting the sliding sleeve to an aligned configuration to allow fluid flow through the check valve device in one direction
Data Source
AI summary
The present description relates to processes and systems for asynchronous frac-to-frac operations for recovering hydro-carbons. The processes can include the use of injection-only and production-only valves that include a housing and at least one sleeve as well as flow restriction components, check valves, or other features. The flow restriction component can be a tortuous path provided in the sleeve. The check valves can be integrated into the sleeve or into the housing of the valve. Various different types of valve assemblies can be used and integrated with flow restriction components and/or check valves.