Porous Material Property Estimation Using Frequency and Strain Transfer Functions

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Solution Overview

Problem

Conventional techniques for estimating mechanical properties of subterranean materials fail to accurately account for the effects of application frequency and strain amplitude, leading to incorrect predictions in various engineering applications, as they assume universal mechanical properties for all applications without considering the specific conditions of frequency and strain amplitude during operations.

Innovation Solution

A method and system that estimate material mechanical properties by constructing frequency and strain amplitude transfer functions based on measurement data, allowing for the derivation and prediction of material properties at specific application frequencies and strain amplitudes, considering the differences between measurement and application conditions, such as those encountered in drilling, fracturing, and other subterranean operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If conventional techniques assume universal mechanical properties for all applications, then the estimation process is simplified, but the prediction accuracy deteriorates because frequency and strain amplitude effects are not accounted for

Engineering Contradiction:

Improveestimation process complexityVSAvoidprediction accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent applies parameter changes by introducing frequency and strain amplitude as variable parameters that modify mechanical properties. Instead of assuming universal properties, the system transforms measurement data using frequency transfer functions and strain amplitude correction factors to adapt properties to specific application conditions, thereby improving prediction accuracy while maintaining manageable complexity through systematic transformation procedures

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements local quality by tailoring mechanical property estimates to specific application conditions (frequency and strain amplitude) rather than using uniform properties for all applications. Each application receives customized property values derived from measurement data transformed according to its specific frequency and strain amplitude requirements, ensuring local accuracy for drilling, fracturing, or other operations

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If measurement data is collected at frequencies and strain amplitudes different from application conditions, then measurement versatility is improved, but direct application of measurement data deteriorates without transformation functions

Engineering Contradiction:

Improvemeasurement versatilityVSAvoidproperty estimation accuracy

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent introduces frequency transfer functions and strain amplitude correction factors as intermediary elements that bridge measurement conditions and application conditions. These transformation functions act as mediators that convert mechanical properties from measurement frequencies and strain amplitudes to application-specific frequencies and strain amplitudes, enabling accurate property estimation despite differences between measurement and application conditions

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent applies preliminary action by pre-establishing frequency transfer functions and strain amplitude correction factors based on measurement data before actual applications. These transformation relationships are determined in advance through measurements at various frequencies and strain amplitudes, allowing rapid and accurate adaptation to specific application conditions without requiring new measurements for each application

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11366049B2Estimation of objective driven porous material mechanical properties

Publication Date: 2022.06.21 BAKER HUGHES OILFIELD OPERATIONS LLC

AI summary

A method of estimating a material mechanical property of a porous material, for an application or objective with a specific application frequency and application strain amplitude, includes estimating an application frequency and an application strain amplitude for use in a targeted application or objective, and constructing a frequency transfer function relating the material mechanical property to measurement frequencies, the measurement frequency range including a measurement frequency different from the application frequency. The method also includes constructing a strain amplitude transfer function relating the material mechanical property at the measurement strain amplitude and the material mechanical property at the application strain amplitude, the measurement strain amplitude different from the application strain amplitude, deriving the material mechanical property from the frequency transfer function using the application frequency, and predicting the material mechanical property from the strain amplitude transformation function using the derived material mechanical property.