Dual-Probe Borehole Tool for Pressure Disturbance Detection
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Solution Overview
Problem
Current down hole tools face challenges in accurately detecting pressure disturbances and identifying second phase fluids during fluid sampling operations, which can lead to non-representative samples due to phase transitions and contamination issues.
Innovation Solution
A system and method utilizing a dual-probe configuration within a borehole, where a first probe performs an operation and a second probe detects pressure disturbances to identify second phase fluids, allowing for responsive actions such as changing tool location or adjusting draw-down pressure to minimize phase evolution, and includes a controller to analyze fluid phases and perform down hole fluid analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single probe is used for fluid sampling operations, then the device complexity is reduced, but the measurement precision of pressure disturbances and detection capability of second phase fluids deteriorates
Solution Approach 1:
The single probe is segmented into two separate probes: a first probe positioned at a first location for performing sampling operations, and a second probe positioned at a second location for detecting pressure disturbances. This segmentation allows each probe to specialize in its specific function, improving measurement precision without requiring excessive complexity in each individual probe
2Productivity
If draw down pressure is increased to improve sampling efficiency, then the productivity of fluid sampling is improved, but phase transitions and contamination occur leading to non-representative samples
Solution Approach 1:
The second probe provides real-time feedback on pressure disturbances and second phase fluid detection during the sampling operation. This feedback mechanism allows the system to monitor the sampling process continuously and identify when phase transitions or contamination are occurring, enabling corrective actions to maintain sample representativeness while preserving sampling efficiency
3Device complexity
If no second phase fluid detection is implemented, then the device complexity is reduced, but the reliability of fluid analysis deteriorates due to non-representative samples
Solution Approach 1:
The second probe performs preliminary detection of pressure disturbances and second phase fluids before they contaminate the sample being collected by the first probe. By detecting these conditions in advance, the system can take preventive measures or adjust sampling parameters to ensure only representative single-phase fluids are analyzed, thereby maintaining high reliability without excessive complexity
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 accurate detection of pressure disturbances and second phase fluids, ensuring representative fluid samples by minimizing phase transitions and contamination, thereby improving the reliability of fluid analysis and sampling operations.
Implementation Method 1
a second probe of the tool at a second location remote from the first location to obtain a pressure reading
Data Source
AI summary
A method for detecting pressure disturbances in a formation accessible by a borehole while performing an operation includes positioning a tool within the borehole, positioning a first probe of the tool at a first location, positioning a second probe of the tool at a second location remote from the first location to obtain a pressure reading, performing an operation with the first probe, detecting the presence of a first phase fluid within the tool, detecting a pressure disturbance within the formation with the second probe, and identifying a second phase fluid based on the detection of the pressure disturbance. Other methods and systems for detecting pressure disturbances in the formation are further shown and described.