Pressure Pulse Well Connectivity Detection During Hydraulic Fracturing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hydraulic fracturing operations can induce hydraulic communication between wells, leading to fluid loss and decreased efficiency due to fluid flowing to depleted zones, affecting both treatment and offset wells.
Innovation Solution
Utilize pressure pulses during hydraulic fracturing to detect well connectivity and determine fracture system properties, adjusting operations to mitigate fluid loss by altering pump rates, proppant, or using diverters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hydraulic fracturing is performed in a multi-well system, then fracture generation and hydrocarbon recovery are improved, but fluid loss to depleted zones and well interference increase
Solution Approach 1:
The system performs preliminary well connectivity testing before full-scale hydraulic fracturing operations. By detecting pressure pulse responses in offset wells during a preliminary phase, the system identifies depleted zones and adjusts fracturing parameters beforehand to prevent fluid loss to these zones during main production operations.
Solution Approach 2:
The system continuously monitors pressure responses in both treatment and offset wells during hydraulic fracturing operations. This feedback mechanism allows real-time detection of well connectivity and fluid loss to depleted zones, enabling dynamic adjustment of pump rates, proppant dosing, and fracturing stage sequencing to optimize productivity while minimizing fluid loss.
2Productivity
If hydraulic fracturing operations are conducted in offset wells, then fracture generation is improved, but well connectivity and interference with adjacent wells increase
Solution Approach 1:
The system conducts preliminary well connectivity tests before initiating hydraulic fracturing in offset wells. By measuring pressure pulse responses in adjacent wells during a preliminary phase, the system identifies which offset wells are hydraulically connected to the treatment well and adjusts fracturing parameters to minimize interference with these adjacent wells.
Solution Approach 2:
The system dynamically adjusts fracturing parameters including pump rate, proppant concentration, and fracturing stage timing based on real-time pressure responses from offset wells. This dynamic control allows the system to optimize fracture generation in target zones while minimizing harmful interference with adjacent offset wells that show connectivity responses.
3Productivity
If pump rate is increased to reduce fluid loss, then fracture generation efficiency is improved, but operational complexity and cost increase
Solution Approach 1:
The system uses real-time pressure monitoring and automated analysis to detect well connectivity and fluid loss conditions. This feedback mechanism enables automated adjustment of pump rates and proppant dosing without requiring complex manual intervention, reducing operational complexity while optimizing fracture generation efficiency through data-driven control.
Solution Approach 2:
The system automatically adjusts key fracturing parameters including pump rate, proppant concentration, and fracturing stage timing based on detected well connectivity conditions. By using automated parameter optimization based on pressure pulse responses, the system improves fracture generation efficiency while avoiding the complexity of manual parameter adjustment and multiple trial-and-error operations.
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
Enhances hydraulic fracturing efficiency by reducing fluid loss to depleted zones, ensuring effective fracture generation in the subsurface formation.
Implementation Method 1
the fractures generated in the rock from hydraulic fracturing operations on a well may induce hydraulic communication between the well and one or more offset wells in the same subsurface formation
Implementation Method 2
determine a subsurface formation travel time of the pressure pulse; determine the fracture length based on the wave speed of the pressure pulse in the subsurface formation
Data Source
AI summary
A method comprises inducing, via one or more hydraulic fracturing components, a first signal in hydraulic fracturing fluid in a treatment well while hydraulically fracturing the treatment well, wherein the treatment well is formed in a subsurface formation. The method comprises detecting, via one or more sensors, a response signal in one or more offset wells formed in the subsurface formation based on the first signal, wherein the response signal indicates well connectivity between the treatment well and the one or more offset wells.