Matrix Stimulation Tool Bypass Port Fluid Placement
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Solution Overview
Problem
Current acid stimulation techniques for hydrocarbon wells face challenges in achieving uniform fluid placement and effective stimulation across heterogeneous reservoirs, particularly in long horizontal open-hole wells, leading to poor zonal coverage and uneven production contributions.
Innovation Solution
A coil-tube tunneling tool system that includes a cylindrical tube with a piston and hollow tubes, where fluid pressure pushes the piston to extend the hollow tubes into the formation, creating tunnels for enhanced acid placement and permeability, utilizing a combination of mechanical and chemical means to stimulate both carbonate and sandstone reservoirs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If diversion techniques are used to distribute stimulation fluids in multiple zones, then fluid placement is improved, but device complexity increases
Solution Approach 1:
The patent extracts the diversion function from complex mechanical or chemical diversion devices and replaces it with a simple plug-and-bypass mechanism. The plug is inserted into a bypass port to redirect fluid through the matrix stimulation pathway, eliminating the need for complex diversion equipment while achieving precise fluid placement control.
Solution Approach 2:
The bypass port acts as an intermediary element that allows fluid to take an alternative path. By controlling the plug position in the bypass port, the system mediates between different fluid flow paths (direct injection vs. matrix stimulation), enabling precise control over fluid distribution without complex diversion devices.
2Ease of operation
If coil tubing and jetting nozzles are used for fluid placement in long wells, then fluid delivery capability is improved, but productivity decreases
Solution Approach 1:
The system segments the fluid delivery function by separating the injection port from the matrix stimulation pathway through the bypass port mechanism. This segmentation allows simultaneous or sequential operation of different stimulation modes without requiring long coil tubing, thereby improving treatment efficiency while maintaining fluid placement capability.
Solution Approach 2:
The bypass port is pre-configured in the injection head assembly, allowing fluid to be redirected into the matrix stimulation pathway before actual stimulation begins. This preliminary configuration eliminates the need for complex real-time adjustments during treatment, improving both ease of operation and productivity.
3Strength
If acid stimulation is applied to heterogeneous reservoirs, then permeability enhancement is improved, but zonal coverage becomes uneven
Solution Approach 1:
The system applies local quality by directing acid stimulation specifically into the matrix block through the bypass port, creating localized high-permeability channels where needed. The plug controls where fluid is redirected, allowing targeted stimulation of specific zones within heterogeneous reservoirs, improving both permeability enhancement and zonal coverage uniformity.
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 enables improved acid placement and permeability enhancement, increasing hydrocarbon production by creating multiple tunnels and passageways within the reservoir, effectively addressing the limitations of existing stimulation methods.
Implementation Method 1
fluid pressure on an upstream side of the piston longitudinally pushes the piston, thereby causing the hollow tube to penetrate into the formation
Implementation Method 2
fluid pressure on an upstream side of the piston longitudinally pushes the piston
Implementation Method 3
This acidic fluid reacts with the reservoir rock, thereby dissolving the rock to create a pathway for hydrocarbon production
Implementation Method 4
This acidic fluid reacts with the reservoir rock, thereby dissolving the rock
Implementation Method 5
The spring may be disposed longitudinally upstream or downstream of the piston
Data Source
AI summary
A matrix stimulation tool includes a cylindrical tube; at least one piston disposed within the cylindrical tube and longitudinally moveable within the cylindrical tube; and at least one hollow tube coupled to the piston, the hollow tube including a distal end disposed within a hole disposed within a wall of the cylindrical tube. Movement of the piston within the cylindrical tube causes movement of the distal end of the at least one hollow tube through the hole.