Adsorption-Based Mercury Detection in Formation Testing
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Solution Overview
Problem
Reservoir fluids often contain harmful substances like mercury, which are difficult to detect before production, posing risks to people and equipment.
Innovation Solution
A formation testing tool with a sample chamber and a concentrating object that adsorbs selected substances, such as mercury, during drilling, allowing for their concentration analysis upon returning to the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional detection methods are used for harmful substances in reservoir fluids, then detection capability is limited, but the risk to people and equipment increases
Solution Approach 1:
The patent implements preliminary detection of harmful substances during the drilling process itself, before reservoir fluids are produced. The formation testing tool samples and analyzes fluids in real-time downhole, enabling early identification of contaminants like mercury before they can cause harm to equipment or personnel during production operations
Solution Approach 2:
The patent replaces conventional mechanical/chemical detection methods with spectroscopic analysis. The formation testing tool uses optical spectroscopy to detect and quantify harmful substances in reservoir fluids, providing much higher sensitivity and precision compared to traditional mechanical filtration or chemical testing methods
2Productivity
If reservoir fluids are produced without prior detection, then production process is simple, but harmful substances cause contamination and damage
Solution Approach 1:
The system performs preliminary detection during drilling operations before production begins. By sampling and analyzing reservoir fluids in-situ using the formation testing tool, harmful substances are identified ahead of time, allowing prophylactic measures to be implemented before production starts, thus preventing contamination and damage while maintaining production efficiency
3Difficulty of detecting and measuring
If harmful substances are detected after production starts, then detection is simpler, but prophylactic measures cannot be taken in time
Solution Approach 1:
The formation testing tool enables preliminary detection during the drilling phase, well before production begins. This timing allows sufficient lead time to implement prophylactic measures such as installing specialized equipment or modifying production procedures to handle detected contaminants, ensuring both timeliness and reliability of protective actions
Solution Approach 2:
The patent introduces an intermediary detection system (the formation testing tool with spectroscopic analyzer) that bridges the gap between drilling and production phases. This intermediary system continuously monitors reservoir fluids during drilling, providing early warning of harmful substances without interfering with the overall production process, thus maintaining both simplicity and timeliness
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 effective detection and quantification of harmful substances in reservoir fluids, facilitating prophylactic measures to prevent contamination and ensuring safer drilling operations.
Implementation Method 1
the concentrating object adsorbs the selected portion from the reservoir fluid
Implementation Method 2
the selected portion can be desorbed from the concentrating object
Data Source
AI summary
An apparatus includes a sample compartment. The apparatus further includes an inlet port through which the sampled reservoir fluid may be introduced into the sample compartment. The apparatus further includes a concentrating object that can be placed within the sample compartment. The concentrating object includes an outer surface and an inner surface recessed from the outer surface. The inner surface is receptive to adsorbing the selected portion of the sampled reservoir fluid.