Fluid Flow Control System with Density-Based Discrimination
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Solution Overview
Problem
Existing devices for regulating the flow of formation fluids in hydrocarbon production wells are often non-discriminating and may not effectively manage pressure differentials, leading to issues like water and gas coning, sand production, and uneven pressure distribution across subterranean zones.
Innovation Solution
A fluid flow control system comprising a fluid nozzle, an inflow control device, and a flow regulator that adjusts pressure drops across production fluid inlets and outlets, utilizing a turbine for density-based fluid discrimination and a pressure regulating piston to manage flow volumes, ensuring the turbine spins minimally and maintaining optimal pressure conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If non-discriminating gatekeeper devices are used to regulate fluid flow, then device complexity is reduced, but the ability to discriminate between different types of formation fluids and manage pressure differentials deteriorates
Solution Approach 1:
The system is divided into multiple independent components: a turbine for density-based fluid discrimination, a flow regulator for pressure differential management, and an inflow control device for flow regulation. Each component performs a specific function, allowing the system to achieve sophisticated fluid discrimination and pressure management while maintaining modular complexity that can be adjusted based on operational needs.
2Adaptability or versatility
If sophisticated fluid discrimination devices are used, then fluid discrimination capability is improved, but device complexity increases
Solution Approach 1:
The turbine automatically responds to changes in fluid density caused by different fluid types (oil, water, gas) by adjusting its rotational speed, which in turn modulates the flow regulator to maintain optimal pressure differentials. This self-regulating mechanism eliminates the need for complex external control systems while achieving sophisticated fluid discrimination and pressure management.
3Productivity
If high flow volumes are used to maximize oil production, then productivity is improved, but erosive effects on the system increase
Solution Approach 1:
The flow regulator dynamically adjusts operational parameters including flow volume, pressure differential, and turbine rotational speed to optimize oil production while maintaining conditions that minimize erosion. By continuously monitoring and adjusting these parameters, the system can operate at high productivity levels without exceeding erosive thresholds on critical components.
4Productivity
If pressure differentials are increased to maximize fluid flow, then fluid flow is improved, but the risk of water and gas coning and sand production increases
Solution Approach 1:
The turbine provides continuous feedback on fluid density changes, which are indicative of water or gas coning. When the turbine detects density changes signaling the onset of coning or sand production, it automatically modulates the flow regulator to reduce pressure differentials to levels that eliminate these harmful effects while maintaining optimal oil production.
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
The system effectively regulates fluid flow based on pressure differentials, minimizing erosive effects and optimizing oil production by ensuring the turbine spins with minimal flow, thus maintaining efficient and balanced production across subterranean zones.
Implementation Method 1
utilizing a turbine for density-based fluid discrimination
Implementation Method 2
a fluid nozzle operable to receive production fluid having a pressure (P3) and discharge control fluid having a control pressure (P2)
Implementation Method 3
the inflow control device configured to open or close the production fluid outlet based upon a pressure differential value (P3−P2)
Implementation Method 4
a flow regulator coupled to the inflow control device, the flow regulator configured to regulate a pressure drop (P3−P1) across the production fluid inlet and the production fluid outlet
Data Source
AI summary
Provided is a fluid flow control system and a well system. The fluid flow control system, in one aspect, includes a fluid nozzle operable to receive production fluid having a pressure (P3) and discharge control fluid having a control pressure (P2). The fluid flow control system, in accordance with this aspect, further includes an inflow control device having a production fluid inlet operable to receive the production fluid having the pressure (P3), a control inlet operable to receive the control fluid having the control pressure (P2) from the fluid nozzle, and a production fluid outlet operable to pass the production fluid to the tubing, the inflow control device configured to open or close the production fluid outlet based upon a pressure differential value (P3−P2). The fluid flow control system, in another aspect, includes a flow regulator coupled to the inflow control device, the flow regulator configured to regulate a pressure drop (P3−P1) across the production fluid inlet and the production fluid outlet.