Predicting Formation Parameters via Drill Bit Vibration Analysis
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Solution Overview
Problem
Existing drilling technologies face challenges in determining formation type and parameters at the drill bit location in real-time, as formation evaluation sensors are typically located uphole and provide measurements after the formation has been drilled, making them unusable for immediate decision-making.
Innovation Solution
The method involves obtaining vibration measurements and formation parameter measurements at various depths, determining their relationship, and using this data to predict formation parameters and types at the drill bit location, enabling real-time determination through a 'Learn and Predict' module that correlates vibration data with formation characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If formation evaluation sensors are located uphole on the drill string, then the sensors can measure formation parameters, but the measurements are obtained at a distance greater than 100 ft. from the drill bit, making them unavailable for real-time decision-making at the drill bit location
Solution Approach 1:
The patent introduces vibration measurements as an intermediary parameter that can be obtained at the drill bit location. Instead of directly measuring formation parameters at the drill bit (which requires sensors too far away), the system uses vibration data as a mediator to infer formation characteristics in real-time at the drill bit location
Solution Approach 2:
The patent replaces the traditional mechanical/electrical formation evaluation sensors with a vibration-based measurement system. By substituting the measurement approach from direct formation sensing to vibration sensing, the system achieves real-time data acquisition at the drill bit without requiring physical sensors in the formation
2Reliability
If formation evaluation sensors are positioned uphole, then the drilling system can determine formation type, but the measurements are only available after the formation has been drilled, preventing real-time adaptation
Solution Approach 1:
The system performs preliminary action by continuously collecting vibration data at the drill bit location before the drill bit actually contacts or penetrates the formation. This allows the system to predict formation characteristics in advance, enabling real-time adaptation and more efficient drilling operations
Solution Approach 2:
The patent implements feedback by using vibration measurements to continuously monitor and predict formation characteristics during drilling. The vibration data provides real-time feedback about the formation type and parameters, allowing operators to adjust drilling parameters dynamically to improve both reliability and productivity
3Loss of time
If vibration measurements are used to predict formation parameters, then real-time determination at the drill bit is achieved, but the system requires establishing relationships between vibration data and formation parameters
Solution Approach 1:
The patent creates a virtual copy or model of formation parameters by correlating vibration measurements with actual formation data. Instead of directly measuring formation properties, the system creates a predictive model that copies formation characteristics from vibration patterns, simplifying the measurement process while maintaining accuracy
Solution Approach 2:
The system changes the measurement parameter from direct formation properties to vibration characteristics. By transforming the data from one parameter domain (formation properties) to another (vibration measurements), the system achieves real-time acquisition while managing complexity through established correlation relationships
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
This approach allows for real-time prediction of formation types and parameters at the drill bit, enhancing drilling operations by providing immediate and accurate data for improved decision-making during the drilling process.
Implementation Method 1
obtain a vibration measurement at each of a plurality of depths in the borehole
Data Source
AI summary
A method and apparatus for predicting a formation parameter at a drill bit drilling a formation is disclosed. A vibration measurement is obtained at each of a plurality of depths in the borehole. A formation parameter is obtained proximate each of the plurality of depths in the borehole. A relationship is determined between the obtained vibration measurements and the measured formation parameters at the plurality of depths. A vibration measurement at a new drill bit location is obtained and the formation parameter at the new drill bit location is predicted from the vibration measurement and the determined relation. Formation type can be determined at the new drill bit location from the new vibration measurement and the determined relationship.