Downhole Electromagnetic Sampling for Heavy Oil Viscosity Reduction
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Solution Overview
Problem
Current methods for sampling heavy oil and bitumen from subsurface reservoirs face challenges due to high viscosity, which limits the efficiency of fluid extraction, as they require significant pressure differences that can induce phase transitions or are difficult to implement without chemically altering the fluid.
Innovation Solution
The use of electromagnetic energy, specifically microwave frequencies, to heat the formation by acting as an absorber with underground water, reducing viscosity through thermal conduction, allowing for more efficient sampling while maintaining the chemical representation of the hydrocarbons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If significant pressure difference is applied to extract heavy oil and bitumen, then fluid extraction efficiency is improved, but phase transitions are induced and chemical composition is altered
Solution Approach 1:
The patent applies electromagnetic energy to change the temperature parameter of the formation, which reduces the viscosity of heavy oil and bitumen. This parameter change enables fluid extraction at lower pressure differences, thereby maintaining chemical composition stability while improving extraction efficiency
Solution Approach 2:
The patent replaces the purely mechanical pressure-based extraction system with an electromagnetic heating system. By using electromagnetic energy to reduce viscosity, the system substitutes mechanical stress with thermal energy, avoiding phase transitions and chemical alterations that occur with high pressure extraction
2Productivity
If significant pressure difference is applied to extract heavy oil and bitumen, then fluid extraction efficiency is improved, but implementation difficulty increases
Solution Approach 1:
The patent replaces complex high-pressure mechanical extraction systems with electromagnetic heating apparatus. This substitution simplifies the implementation by using electromagnetic energy to reduce viscosity, making the extraction process easier to operate while maintaining high extraction efficiency
Solution Approach 2:
By changing the temperature parameter through electromagnetic heating, the patent reduces viscosity to a level where extraction can be performed with minimal pressure difference. This parameter change simplifies the operational requirements and makes the system easier to implement
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 method effectively reduces the viscosity of heavy oils and bitumens, enhancing their mobility and facilitating their extraction without altering their chemical composition, thus improving the sampling process and enabling more accurate production strategies.
Implementation Method 1
The use of electromagnetic energy, specifically microwave frequencies, to heat the formation by acting as an absorber with underground water
Implementation Method 2
reducing viscosity through thermal conduction
Data Source
AI summary
A downhole tool for extracting a sample from a subsurface formation includes an emitter of electromagnetic energy configured to heat water in the subsurface formation. A method for extracting a sample from a subsurface formation involves conveying a downhole tool in a wellbore drilled through the subsurface formation, the downhole tool having an emitter of electromagnetic energy configured to heat water in the subsurface formation, and actuating the emitter to expose a portion of the formation to electromagnetic energy.