Chemical compositions for geothermal well stimulation
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Solution Overview
Problem
Existing geothermal well stimulation methods fail to effectively increase the heat transfer surface area and fluid contact with the rock face, leading to inefficient heat collection and fluid distribution, particularly in high-temperature environments.
Innovation Solution
The use of diversion agents, such as polyurethane, polyethylene terephthalate, polyamide, nylon, polyamide-imide, polycaprolactone, and dissolvable elastomers, combined with additives like carbon, glass, and fibers, to create complex fracture networks and maintain mechanical integrity at high temperatures, enhancing fluid diversion and heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional stimulation methods are used, then the process is simple, but the heat transfer surface area is insufficient
Solution Approach 1:
The patent introduces diversion agents that segment the fluid flow path by creating multiple fracture networks and diverting fluid to different zones of the formation. This segmentation increases the heat transfer surface area by ensuring fluid contacts more rock face across multiple fracture planes rather than following a single flow path
Solution Approach 2:
The diversion agents are deployed to create locally optimized fracture patterns in specific zones of the formation. By placing diversion agents strategically, the stimulation creates heterogeneous fracture networks with enhanced heat transfer surface area in high-potential zones while maintaining simpler stimulation in other areas
2Productivity
If diversion agents are introduced to increase heat transfer surface area, then heat collection efficiency improves, but the cost and complexity of the process increases
Solution Approach 1:
The patent utilizes parameters of the diversion agents (such as temperature-responsive properties, solubility characteristics, and viscosity) to control their deployment and functionality. By adjusting these parameters, the system achieves enhanced heat collection efficiency through controlled fracture network creation and fluid diversion, while managing the complexity of the fluid composition
3Reliability
If high-temperature resistant materials are used for diversion agents, then mechanical integrity is maintained, but material selection and cost increase
Solution Approach 1:
The patent employs composite material formulations for diversion agents that combine high-temperature resistant components with functional additives. These composite materials maintain mechanical integrity at geothermal temperatures exceeding 350°F while incorporating cost-effective components and additives that enhance performance without significantly increasing manufacturing complexity
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 solution increases the heat transfer surface area and fluid contact with the rock face, optimizing heat collection and fluid distribution in geothermal wells, even in temperatures exceeding 350°F, by creating branched fractures and maintaining diversion agent integrity for at least two hours.
Implementation Method 1
wherein the diversion agent maintains its mechanical integrity for at least two hours
Implementation Method 2
Hydraulic fracturing, fluid stimulation, or a combination thereof may be performed during the at least two hours
Implementation Method 3
introducing a second fluid for collecting heat from the formation
Implementation Method 4
The rock face heat transfer surface area matters—more surface area facilitates more heat transfer across the rock face
Data Source
AI summary
A method, apparatus, system, and compositions for introducing diversion agents into a subterranean formation traversed by a wellbore with a heat transfer surface, including forming a first fluid comprising a diversion agent, introducing the first fluid into a region of the formation wherein the heat transfer surface is higher than if no agent were present, and introducing a second fluid for collecting heat from the formation. A method, apparatus, system, and compositions for introducing diversion agents into a subterranean formation traversed by a wellbore with a heat transfer surface, including forming a first fluid comprising a diversion agent, introducing the first fluid into a region of the formation wherein the formation is at least 350° F. and wherein the agent maintains its mechanical integrity at least 2 hours, and introducing a second fluid to the formation.