Integrated Well Logging System for Simultaneous Pressure and Caliper Data
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Solution Overview
Problem
Current well logging techniques in the oil and gas industry face challenges in accurately mapping reservoir pressure over large subsurface areas due to limited pressure measurement points, which do not account for geological features or reservoir dynamics, leading to inaccurate pressure condition indications.
Innovation Solution
An integrated well logging system combining a static bottom-hole pressure survey and a multi-finger caliper tool, allowing for simultaneous measurement of pressure and internal diameter of the well annulus using a plurality of measuring arms and memory gauges, enabling continuous data collection during a single run.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate runs are conducted for pressure surveys and caliper logs, then comprehensive data collection is achieved, but time consumption and operational complexity increase
Solution Approach 1:
The patent combines static bottom-hole pressure survey tools and multi-finger caliper log tools into a single integrated well logging system. This merging allows both pressure data and tubing diameter data to be collected simultaneously during one run, eliminating the need for multiple separate operations while maintaining comprehensive data collection.
Solution Approach 2:
The integrated well logging system performs multiple functions simultaneously: it conducts static bottom-hole pressure surveys using memory gauges and performs caliper logging using multiple measuring arms. This multi-functionality enables comprehensive data collection in a single operation, reducing time loss while ensuring data reliability.
2Ease of manufacture
If simple linear interpolation is used between pressure control points, then calculation simplicity is maintained, but accuracy of pressure mapping deteriorates
Solution Approach 1:
The patent transforms the pressure mapping approach from simple linear interpolation to a more sophisticated method that incorporates geological features and reservoir dynamics. By changing the parameters considered in the interpolation process to include geological structure data and production dynamics, the system achieves higher pressure mapping accuracy while maintaining computational feasibility.
3Quantity of substance
If limited number of pressure measurement points are used, then measurement cost is reduced, but accuracy of reservoir pressure indication deteriorates
Solution Approach 1:
The patent introduces geological features and reservoir dynamics as intermediary elements that enhance the value of limited pressure measurement points. By using these intermediaries to inform the interpolation process, the system can accurately map reservoir pressure across the entire field even with a relatively small number of actual measurement points, thus maintaining measurement precision without requiring proportional increases in the quantity of measurement points.
Data Source
AI summary
An integrated well logging system includes an elongated stem portion configured to lower the well logging system into a hydrocarbon well, a multi-finger calipers for measuring the internal diameter of the annulus of the hydrocarbon well, the multi-finger calipers comprising a plurality of measuring arms, a first crossover configured to connect the stem portion to the multi-finger calipers, a static bottom hole pressure survey configured to measure the pressure at a location within the hydrocarbon well, the static bottom hole pressure survey comprising a plurality of memory gauges, and a second crossover configured to connect the multi-finger calipers to the static bottom hole pressure survey.