Dehydration Tube Sand Control System
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Solution Overview
Problem
Current well completion methods face challenges in efficiently distributing fluid inflow over the length of production tubing, particularly in wellbores with varying permeability, and in effectively managing gravel packing operations to prevent sand accumulation and fluid loss.
Innovation Solution
The system employs dehydration tubes with flow control mechanisms and inflow control devices to manage fluid flow and gravel filtration, ensuring controlled fluid distribution and sand control by filtering gravel slurry and routing carrier fluid back to the surface, while restricting flow to prevent excessive fluid loss and fracture pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gravel packing is used to protect screens, then sand control is improved, but fluid loss and formation damage may occur
Solution Approach 1:
The system segments the gravel packing process by providing separate bypass channels that allow carrier fluid to bypass the gravel pack independently from the production flow path. This segmentation enables gravel to be placed while minimizing fluid loss through the formation, as the bypass channels provide an alternative flow path for excess fluid.
Solution Approach 2:
The bypass channels act as an intermediary mechanism between the gravel pack and the formation. They mediate the flow of carrier fluid during gravel placement, allowing fluid to bypass the gravel pack without forcing it through the formation, thereby reducing fluid loss and formation damage while still enabling effective sand control.
2Reliability
If inflow control devices are used to distribute fluid flow, then production distribution is improved, but device complexity increases
Solution Approach 1:
The bypass channels serve multiple functions: they facilitate gravel placement during packing operations, control fluid flow during production, and provide a bypass path when needed. This multi-functionality reduces the need for separate dedicated components for each function, thereby managing device complexity while achieving reliable production distribution.
Solution Approach 2:
The system utilizes changes in flow parameters (pressure, flow rate) to control fluid distribution through the bypass channels and ICDs. By adjusting these parameters, the system achieves controlled production distribution without requiring complex mechanical control mechanisms, thereby balancing reliability with manageable device complexity.
3Ease of operation
If bypass channels are provided for blocked wellbores, then gravel placement is improved, but device complexity increases
Solution Approach 1:
The bypass channels are pre-configured into the screen assembly structure before gravel placement operations. This preliminary action ensures that if the wellbore becomes blocked during gravel placement, the bypass channels are already in position to facilitate alternative flow paths, improving ease of operation without requiring complex real-time adjustments or additional equipment.
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 fluid distribution across the production string, reduces sand accumulation, and minimizes fluid loss, thereby improving well operation efficiency and preventing formation damage during gravel packing and production phases.
Implementation Method 1
The at least one dehydration tube has openings sized to filter particles larger than a predetermined size
Implementation Method 2
Fluid flow along the at least one dehydration tube and/or into the base pipe is controlled with a flow control mechanism
Implementation Method 3
an inflow of fluid from an exterior to an interior of select screen assemblies is separately controlled with an inflow control device
Data Source
AI summary
A technique facilitates a well operation employing at least one dehydration tube. The at least one dehydration tube is located along an exterior of a plurality of screen assemblies deployed in a wellbore and is fluidly coupled to a base pipe of at least one of the screen assemblies. The fluid coupling provides fluid access to the base pipe through a base pipe opening. Fluid flow along the at least one dehydration tube is controlled with a flow control mechanism. Additionally, an inflow of fluid from an exterior to an interior of select screen assemblies is separately controlled with an inflow control device associated with each select screen assembly.