Electrochemical Impedance Spectroscopy for Oil-Based Drilling Fluids

Solution Overview

Problem

Current methods for measuring oil content in oil-based drilling fluids are slow and non-real-time, making it difficult to monitor and adjust drilling fluid properties efficiently during operations, as they require distillation processes that are impractical for continuous circulation.

Innovation Solution

The use of electrochemical impedance spectroscopy (EIS) to measure oil content in oil-based drilling fluids, allowing for real-time monitoring and the development of models that correlate EIS measurements with oil content, enabling continuous estimation of oil content during drilling operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If distillation process is used to measure oil content, then measurement accuracy is improved, but measurement time increases significantly

Engineering Contradiction:

Improveoil content measurement accuracyVSAvoidmeasurement time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent replaces the mechanical/thermal distillation system with an electrical impedance spectroscopy system. Instead of heating and distilling the drilling fluid to separate oil and water phases, the invention uses electrical signals to measure impedance properties that correlate with oil content, achieving rapid real-time measurements without thermal processing.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention changes the measurement parameter from physical separation (distillation) to electrical property measurement (impedance spectroscopy). By measuring the electrical impedance of the drilling fluid across different frequencies and correlating it with oil content through calibration models, the system achieves accurate measurements without the time-consuming distillation process.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If distillation process is used to measure oil content, then measurement accuracy is improved, but operational efficiency deteriorates

Engineering Contradiction:

Improveoil content measurement accuracyVSAvoiddrilling operation efficiency

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent replaces the mechanical/thermal distillation system with an electrical impedance spectroscopy system. Instead of heating and distilling the drilling fluid to separate oil and water phases, the invention uses electrical signals to measure impedance properties that correlate with oil content, achieving rapid real-time measurements without thermal processing.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention enables continuous real-time monitoring of oil content in the drilling fluid circulation system. The impedance spectroscopy measurement can be performed continuously on flowing drilling fluid, providing ongoing data that allows for immediate adjustments to maintain optimal oil content, thereby improving overall operational efficiency.

Inventive Principle:

Principle #20Continuity of useful action

3Ease of manufacture

If sample distillation is used for measurement, then measurement feasibility is improved, but real-time monitoring capability deteriorates

Engineering Contradiction:

Improvemeasurement feasibilityVSAvoidreal-time monitoring capability

Core Design Contradiction:

Ease of manufactureVSLoss of time

Solution Approach 1:

The patent replaces the mechanical/thermal distillation system with an electrical impedance spectroscopy system. Instead of heating and distilling the drilling fluid to separate oil and water phases, the invention uses electrical signals to measure impedance properties that correlate with oil content, achieving rapid real-time measurements without thermal processing.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The impedance spectroscopy system serves multiple functions: it can measure oil content in both static samples and flowing drilling fluid, provides real-time data, and can be integrated into the existing drilling fluid circulation system. This universal measurement capability eliminates the need for separate sampling and distillation procedures.

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

Enables real-time measurement and adjustment of oil content in oil-based drilling fluids, improving operational efficiency by providing immediate feedback and reducing delays in correcting fluid properties.

Implementation Method 1

performing electro impedance spectroscopy on the sample by a process that comprises applying an alternating electric current to the sample and measuring a response of sample to obtain electro impedance spectroscopy measurements

Methodology Applied

Scientific EffectElectrochemical impedance spectroscopy: Electrical Resistance

Data Source

PatentUS11441421B2Measuring the oil content in oil-based drilling fluids

Publication Date: 2022.09.13 HALLIBURTON ENERGY SERVICES INC

AI summary

Systems and methods for measurement of the oil content in oil-based drilling may be provided in accordance with embodiments of the present disclosure. A method for measuring oil content of an oil-based drilling fluid may include providing a sample of the oil-based drilling fluid. The method may further include performing electro impedance spectroscopy on the sample by a process that comprises applying an alternating electric current to the sample and measuring a response of sample to obtain electro impedance spectroscopy measurements. The method may further include determining an estimate of the oil content of the sample based, at least partially on the electro impedance spectroscopy measurements.