Downhole Logging Image De-spreading via Motion Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Logging data in oil fields often results in blurry or smeared images due to hostile drilling environments and tool motion, which affects the accuracy and clarity of measurements.
Innovation Solution
A downhole tool system that includes sensors and a processing system to gather and enhance two-dimensional logging data by determining a de-spreading function based on measured characteristics such as tool motion and borehole geometry, applying it to the data to produce clearer images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If logging tools operate in hostile drilling environments with tool motion, then logging operations can be performed, but images become blurry or smeared
Solution Approach 1:
The system performs preliminary actions by measuring tool motion characteristics and borehole geometry during the logging operation, then uses these measurements to calculate de-spreading functions that are applied to restore image clarity. The de-spreading function is determined in advance based on the measured characteristics, allowing the system to compensate for blurring effects before final image generation.
Solution Approach 2:
The system implements feedback by continuously measuring tool motion and borehole geometry characteristics, using these measurements to adjust and optimize the de-spreading function application. The measured characteristics provide feedback about the actual logging conditions, allowing the system to adapt the image enhancement process to match the specific operational parameters and achieve better image quality.
2Measurement precision
If de-spreading function is applied to enhance image quality, then image clarity improves, but processing complexity increases
Solution Approach 1:
The system applies parameter changes by transforming the raw logging data through mathematical operations that incorporate the de-spreading function. The measured tool motion and borehole geometry parameters are used to calculate correction factors that are applied to the imaging process. This approach enhances image clarity by adjusting the parameters of the image formation model to account for the blurring effects caused by tool motion and environmental conditions.
Data Source
AI summary
Systems and methods are provided to enhance logging data images. Some system embodiments include a dowhole tool, at least one sensor, and a processing system. The downhole tool gathers two-dimensional logging data while moving through a borehole. The sensor(s) measure at least one characteristic of the downhole tool's operation or environment, such as tool motion, offset distance, borehole geometry, and/or properties of the borehole fluid. Such characteristics can cause smearing or spreading of the tool's logging data measurements. Accordingly the processing system determines a de-spreading function based at least in part on the measured characteristic(s) and applies the de-spreading function to the two-dimensional logging data to obtain an enhanced logging data image, which can be presented to a user via a user interface.