Monitor Well Pressure Control for Fracturing Operations
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Solution Overview
Problem
Current hydraulic fracturing techniques face challenges in accurately controlling and optimizing the fracturing process in subterranean formations, leading to inefficient distribution and propagation of fractures, which affects hydrocarbon production and increases costs.
Innovation Solution
The method involves using a monitor well to measure pressure changes and adjust the fracturing fluid pumping rate and parameters in real-time, employing poroelastic coupling to dynamically control the fracturing operation, thereby distributing fluid across multiple fractures and preventing dominant fracture growth, without the need for diverters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hydraulic fracturing is performed using conventional techniques with fixed pumping rates, then the fracturing process can be implemented with simple equipment and procedures, but the fracture distribution is inefficient and dominant fracture growth occurs reducing hydrocarbon production
Solution Approach 1:
The system continuously monitors pressure changes in a monitor well and uses this feedback to dynamically adjust the fracturing fluid pumping rate. When pressure change rates indicate dominant fracture growth, the system automatically reduces pumping rate to redistribute fluid to other fracture zones, thereby optimizing fracture distribution and hydrocarbon production without requiring complex real-time control algorithms
Solution Approach 2:
The monitor well naturally provides pressure change data that directly reflects the state of fracture propagation in the formation. This self-monitoring capability eliminates the need for additional sensors or complex measurement systems in the fractured well, as the monitor well's pressure response serves as an intrinsic indicator of fracturing effectiveness and dominant fracture development
2Length of moving object
If hydraulic fracturing uses high pumping rates to create extensive fractures, then fracture propagation distance increases, but fluid distributes unevenly creating dominant fractures that reduce overall effectiveness
Solution Approach 1:
The system dynamically adjusts the pumping rate based on real-time pressure monitoring rather than maintaining a fixed rate. When the monitor well detects rapid pressure changes indicating dominant fracture growth, the system automatically reduces the pumping rate to allow fluid to distribute more uniformly across multiple fracture zones, thereby achieving both adequate fracture length and improved distribution uniformity
Solution Approach 2:
The system changes the pumping rate parameter in response to monitored pressure conditions. By adjusting this critical parameter based on formation response, the system optimizes the balance between fracture propagation distance and distribution uniformity, preventing the formation of dominant fractures while maintaining effective fracture extension
3Manufacturing precision
If diverters are used to control fracture distribution, then fluid can be redirected away from dominant fractures, but the system complexity and cost increase significantly
Solution Approach 1:
The system replaces mechanical diverters with a pressure-based control mechanism. Instead of using physical devices to block or redirect fluid flow, the system uses real-time pressure monitoring and dynamic pumping rate adjustment to achieve fracture distribution control, thereby eliminating the need for complex mechanical diverter systems while maintaining effective fracture management
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 fracture distribution and propagation, leading to increased hydrocarbon production, reduced costs, and improved fracturing efficiency by dynamically adjusting fracturing parameters based on real-time pressure data from the monitor well.
Implementation Method 1
A baseline rate of pressure change in a monitor well is obtained. The monitor well is poroelastically coupled to the formation.
Implementation Method 2
Fracturing, generally speaking, involves pumping of fluid from the surface at high volume and pressure into the wellbore and into the formation surrounding the wellbore. The resource bearing formation surrounding the wellbore fractures under the pressure and volume of the injected fluid.
Data Source
AI summary
Systems and methods for controlling fracturing operations include monitoring pressure within a monitor well poroelastically couplable to an active well. In response to pressure changes observed in the monitor well, operational parameters of the fracturing operation are modified to, among other things, encourage or inhibit fracture initiation and propagation. For example, modifications to properties of the fracturing fluid, modification to pumping parameters, rate cycling, and diversion operations may each be undertaken in response to observed pressure changes within the monitor well. Single-well applications are also provided in which pressure measurements are obtained from an isolated section of a well poroelastically couplable to an uphole section of the same well. The pressure measurements are subsequently used to control fracturing operations of the uphole section.