Downhole Flow Control Devices for Brine Production
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Solution Overview
Problem
Existing wellbore operations face challenges in isolating and efficiently producing brine, particularly lithium-rich brine, while minimizing the production of unwanted materials like hydrocarbons, which increases operational complexity and resource usage.
Innovation Solution
The use of a set of flow control devices, including density autonomous, viscosity autonomous, and electric inflow control devices, positioned in isolated zones of the wellbore to selectively control the flow of materials based on their properties, such as density, viscosity, and composition, thereby optimizing brine production and restricting unwanted material flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional wellbore operations are used to produce brine, then brine production is achieved, but unwanted materials like hydrocarbons are also produced along with increased operational complexity
Solution Approach 1:
The wellbore is divided into multiple isolated zones using packers or other isolation devices. Each zone can be independently controlled by dedicated flow control devices, allowing selective production from specific zones containing brine while preventing unwanted materials from other zones from contaminating the production stream. This segmentation enables targeted brine production without co-production of hydrocarbons from adjacent zones.
Solution Approach 2:
Different flow control devices with specific control characteristics are deployed in different isolated zones based on the local fluid properties and production requirements. For example, density-autonomous devices are used where density differentiation between brine and hydrocarbons is significant, while electrically controlled devices are used where remote adjustability is needed. This local optimization of control strategies enables efficient brine production while minimizing unwanted material co-production.
2Quantity of substance
If conventional wellbore operations are used to produce brine, then brine production is achieved, but resource usage increases
Solution Approach 1:
Density-autonomous flow control devices automatically adjust flow control based on the density of the fluid passing through them, without requiring external power or control signals. These devices exploit the natural density difference between brine and hydrocarbons to autonomously favor brine flow while restricting hydrocarbon flow, eliminating the need for continuous energy input and reducing operational resource requirements.
Solution Approach 2:
The system utilizes changes in fluid properties (density, viscosity, composition) as control parameters to automatically regulate flow. Flow control devices are configured to respond to these parameter variations, adjusting flow paths and restrictions dynamically based on the actual fluid composition in each zone, thereby optimizing brine production efficiency while minimizing energy and resource consumption.
3Productivity
If flow control devices are positioned in isolated zones to selectively control material flow, then brine production is optimized, but device complexity increases
Solution Approach 1:
The system employs multiple types of flow control devices (density-autonomous, viscosity-autonomous, electrically controlled) that can be deployed in a standardized manner across different isolated zones. Each device type serves multiple functions: flow restriction, fluid property sensing, and automatic adjustment. This multi-functionality reduces the need for additional specialized equipment and simplifies the overall system architecture despite the complexity of selective zone control.
Solution Approach 2:
Packers or other isolation devices serve as intermediaries that create the isolated zones necessary for selective production. These intermediaries enable the deployment of flow control devices in specific zones without requiring complex modifications to the entire wellbore system. The packers provide mechanical isolation and serve as mounting platforms for flow control devices, simplifying the integration of complex control functionality into the wellbore architecture.
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 solution enables efficient and targeted production of lithium-rich brine while minimizing the production of hydrocarbons and other unwanted materials, thereby simplifying wellbore operations and reducing resource usage.
Implementation Method 1
a first flow control device can be positioned in a first isolated zone of the wellbore to control flow of a first material, and a second flow control device can be positioned in a second isolated zone of the wellbore to control flow of a second material
Implementation Method 2
viscosity autonomous... inflow control devices, positioned in isolated zones of the wellbore to selectively control the flow of materials based on their properties, such as density, viscosity, and composition
Data Source
AI summary
A system can be used to produce brine from a wellbore. The system can include a first flow control device and a second flow control device. The first flow control device can be positioned downhole in a wellbore to control flow of first material based on one or more first fluid properties of the first material. The second flow control device can be positioned downhole in the wellbore offset from the first flow control device to control flow of a second material based on one or more second fluid properties of the second material. The second material can be different than the first material and can include a brine having an alkali metal.