Formation Elasticity Evaluation Using Transferable BHA Mapping

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Solution Overview

Problem

Conventional methods for determining rock elastic properties during wellbore drilling require recalibration of the bit-rock interaction model for each change in bottom hole assembly (BHA), leading to inconsistent and inaccurate predictions.

Innovation Solution

Utilizing transferable mapping parameters from a calibration wellbore to estimate rock elastic properties in different wellbores, allowing the bit-rock interaction model to be applied consistently across various BHAs without recalibration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the bit-rock interaction model is recalibrated for each change in bottom hole assembly (BHA), then the model can be adapted to specific BHA characteristics, but the process becomes time-consuming and leads to inconsistent predictions across different wellbores

Engineering Contradiction:

Improvemodel adaptability to different BHAsVSAvoidrecalibration time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent applies parameter changes by transforming the model parameters into transferable mapping parameters that can be reused across different BHAs. Instead of recalibrating the entire model for each BHA change, the system updates only the mapping parameters based on BHA characteristics, significantly reducing recalibration time while maintaining model adaptability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements preliminary action by pre-establishing the bit-rock interaction model with generic parameters that can be applied to multiple BHAs. The system performs preliminary mapping parameter determination based on BHA characteristics before actual drilling operations, allowing rapid adaptation without full recalibration.

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If the bit-rock interaction model is recalibrated for each change in bottom hole assembly (BHA), then the model accuracy for specific BHA can be improved, but the prediction consistency across different wellbores deteriorates

Engineering Contradiction:

Improvemodel prediction accuracyVSAvoidprediction consistency

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent applies universality by developing a universal bit-rock interaction model that can serve multiple BHAs through transferable mapping parameters. The model maintains prediction consistency across different wellbores by using a standardized framework that adapts to different BHA characteristics through parameter transformation rather than complete recalibration.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent implements feedback mechanisms where the mapping parameters are updated based on actual drilling performance and rock property measurements. This feedback loop allows the model to maintain high accuracy for specific BHAs while preserving consistency across different wellbores through continuous parameter optimization.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If conventional wireline or LWD sonic logging methods are used to determine rock elastic properties, then accurate elastic properties can be obtained, but the method is more expensive and less economic compared to bit-rock interaction modeling

Engineering Contradiction:

Improverock elastic property measurement accuracyVSAvoiddrilling operation cost

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent applies self-service by enabling the drilling process itself to provide the data needed for elastic property determination. The bit-rock interaction model uses existing drilling data (ROP, vibrations, torque) that are already collected during normal drilling operations, eliminating the need for separate expensive wireline or LWD logging operations while maintaining measurement accuracy.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces the mechanical/sensor-based measurement systems (wireline, LWD) with a computational model that processes existing drilling mechanical data. The bit-rock interaction model substitutes physical measurement tools with a mathematical framework that derives elastic properties from drilling parameters, significantly reducing operational costs.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS20250291081A1Data-based formation elastic property evaluation with transferable mapping parameters

Publication Date: 2025.09.18 HALLIBURTON ENERGY SERVICES INC

AI summary

A method comprises obtaining a first drilling dataset corresponding to a first bottom hole assembly drilling a first wellbore. The method comprises determining mapping parameters based on the first drilling dataset and elastic properties of the first wellbore. The method comprises obtaining a second drilling dataset corresponding to a second bottom hole assembly drilling a second wellbore. The method comprises determining the elastic properties of the second wellbore based on the second drilling data and the mapping parameters.