Active Seismic Monitoring for Fracturing Fluid Detection

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Solution Overview

Problem

Hydraulic fracturing operations face significant challenges due to fluid loss into the porous matrix of subterranean formations, limiting fracture size and geometry, and increasing operational costs.

Innovation Solution

Incorporating a seismic survey with a fracturing fluid additive that enhances acoustic impedance, allowing for active monitoring and identification of fracturing fluid locations within the hydrocarbon reservoir using seismic sources and receivers positioned near or within the well bore, enabling more effective fracture detection and fluid management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If fracturing fluid is pumped into the well bore to create fractures, then fracture size and geometry are improved, but fluid loss into the porous matrix increases

Engineering Contradiction:

Improvefracture sizeVSAvoidfracturing fluid loss

Core Design Contradiction:

Volume of moving objectVSLoss of substance

Solution Approach 1:

The patent implements active seismic monitoring during fracturing operations to provide real-time feedback on fracture creation and fluid distribution. Seismic sources and receivers detect acoustic signals from fractures as they form, allowing operators to monitor fluid movement and adjust pumping parameters dynamically to minimize fluid loss while maintaining effective fracture stimulation

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces traditional mechanical monitoring methods with acoustic/seismic detection systems. By using seismic sources to generate acoustic waves and receivers to detect signals from fracture propagation, the system provides non-intrusive real-time monitoring of the fracturing process without requiring additional mechanical intervention in the formation

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Volume of stationary object

If large quantities of fracturing fluid are pumped to create adequate fracture volume, then fracture geometry is improved, but operational costs increase

Engineering Contradiction:

Improvefracture volumeVSAvoidpumping cost

Core Design Contradiction:

Volume of stationary objectVSLoss of energy

Solution Approach 1:

The patent performs baseline seismic surveys before fracturing operations to pre-characterize the formation properties, acoustic velocity, and expected fracture pathways. This preliminary information allows operators to optimize fluid injection parameters in advance, targeting specific formation zones and minimizing the total fluid volume required to achieve effective fracture stimulation

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Real-time seismic monitoring during fracturing provides feedback on actual fracture propagation versus predicted pathways. Operators can dynamically adjust injection rates and pressure to ensure fluid is efficiently converting to fracture growth rather than losing to the formation, optimizing the relationship between fluid volume injected and fracture volume created

Inventive Principle:

Principle #23Feedback

3Productivity

If traditional fracturing operations are performed without monitoring, then operational simplicity is maintained, but fluid distribution and fracture geometry cannot be optimized

Engineering Contradiction:

Improvehydrocarbon recovery rateVSAvoidmonitoring system complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The seismic monitoring system serves multiple functions: it characterizes formation properties before fracturing, tracks fracture propagation in real-time, identifies fluid distribution patterns, and provides data for optimizing subsequent fracturing stages. This multi-functional approach maximizes the value of the monitoring system while managing complexity through integrated software that processes all data streams uniformly

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 the visibility of fracturing fluid and fractures during the hydraulic fracturing process, allowing for real-time adjustments to improve fluid distribution and fracture geometry, thereby increasing hydrocarbon recovery rates and reducing operational costs.

Implementation Method 1

an additive that enhances acoustic impedance between the fracturing fluid and subsurface formations in which the hydrocarbon reservoir is located

Methodology Applied

Scientific EffectAcoustic impedance contrast: Reflection

Data Source

PatentUS9127543B2Active seismic monitoring of fracturing operations

Publication Date: 2015.09.08 WESTERNGECO LLC

AI summary

A method for managing a fracturing operation. In one implementation, the method may include positioning a seismic source and at least one seismic receiver near a hydrocarbon reservoir; pumping a fracturing fluid into a well bore of the hydrocarbon reservoir such that the fracturing fluid may include an additive that enhances acoustic impedance between the fracturing fluid and subsurface formations in which the hydrocarbon reservoir is located and that produces a foam; performing a seismic survey with the seismic source and the at least one seismic receiver during the fracturing operation; and identifying locations of the fracturing fluid within subsurface formations in which the hydrocarbon reservoir is located.