Formation Resistivity Evaluation System Using Multi-Curve Graphical Display
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Solution Overview
Problem
Current systems for evaluating formation resistivity near a wellbore are limited in providing comprehensive information, often lacking quantitative detail and requiring operators to rely on color smears that do not effectively convey necessary data for accurate analysis.
Innovation Solution
A system and method that generate curves representing approximate formation resistivity at different distances from the wellbore, displayed on a graph, allowing for dynamic analysis of data quality and comparison between curves to determine the reliability of measurements, with features such as color coding and notification for unacceptable data quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If color smear models are used to display formation resistivity, then visual representation is provided, but quantitative information and comprehensive analysis capability are limited
Solution Approach 1:
The patent transitions from two-dimensional color smear representations to multi-curve graphical displays that show formation resistivity across multiple dimensions including distance from wellbore, azimuth, and depth. This dimensional expansion preserves visual intuitiveness while adding quantitative depth through curve overlays and data point markers.
Solution Approach 2:
The system generates multiple curve representations (copies) of formation resistivity data from different measurement sources and distances, overlaying them on a single graph. This allows operators to compare multiple data sets simultaneously, maintaining visual clarity while providing comprehensive quantitative information through the stacked curve structure.
2Reliability
If multiple curves representing different resistivity measurements are displayed, then comprehensive data analysis is enabled, but graph complexity and difficulty of interpretation increase
Solution Approach 1:
The patent applies different visual qualities to different parts of the graph: curves from more reliable measurements are displayed with greater prominence, while less reliable data is shown with reduced visibility. This local differentiation allows operators to quickly assess data quality without being overwhelmed by uniform complexity throughout the entire display.
Solution Approach 2:
The system uses color variations to encode different levels of data reliability and measurement confidence. By assigning distinct colors to curves based on their reliability metrics, the patent reduces the cognitive load of interpreting multiple curves while maintaining comprehensive data representation.
3Measurement precision
If detailed quantitative data is provided for formation resistivity, then analysis accuracy improves, but ease of quick assessment decreases
Solution Approach 1:
The system pre-processes formation resistivity data to calculate reliability metrics and organize measurements by distance and azimuth before display. This preliminary organization of quantitative data allows operators to immediately assess data quality and accuracy without performing manual analysis, reducing interpretation time while maintaining measurement precision.
Solution Approach 2:
The patent provides immediate visual feedback through the multi-curve display, where the relative positions and characteristics of overlaid curves directly indicate measurement reliability and formation properties. This feedback mechanism allows operators to quickly assess quantitative data accuracy without additional processing steps.
Data Source
AI summary
The disclosed embodiments include systems and methods to evaluate formation resistivity. In one embodiment, a method to evaluate formation resistivity proximate a wellbore is provided. The methods includes receiving data indicative of resistivity measurements of a formation proximate a wellbore at different distances within a range of distances from the wellbore. The method also includes analyzing the data to determine approximate formation resistivity of the formation at different distances from the wellbore. The method further includes generating at least one curve, each indicative of an approximate formation resistivity of the formation at the different distances from the wellbore, overlaying the at least one curve on a graph indicative of the formation resistivity of the formation within the range of distances from the wellbore, and providing the at least one curve overlaid on the graph for display on a device.