Predictor-Corrector Filter for Flood Front Distance Measurement
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Solution Overview
Problem
Current hydrocarbon production flooding processes face challenges in accurately monitoring the flood front due to uncertainties in estimation models, leading to potential premature breakthrough of injected fluids at critical points within the formation or wellbore.
Innovation Solution
A monitoring system employing a predictor-corrector filter that uses electromagnetic fields to measure and correct distance data to the flood front, minimizing uncertainties and errors through a combination of observation and dynamic models, thereby adjusting flow control devices to prevent breakthrough.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an estimation model is used to monitor the flood front, then the monitoring capability is provided, but the accuracy of the data is affected by uncertainties leading to premature breakthrough
Solution Approach 1:
The system implements a feedback mechanism where the predictor-corrector filter continuously processes distance measurements and compares predicted flood front positions with actual measurements. The filter uses the difference between predicted and measured values to correct subsequent predictions, creating a closed-loop system that continuously improves measurement accuracy and reduces uncertainties in flood front monitoring.
Solution Approach 2:
The predictor-corrector filter acts as an intermediary between the raw distance measurements and the flood front position determination. This intermediary component processes the measurements through a mathematical filter that combines prediction models with correction terms, effectively reducing the impact of uncertainties and providing more reliable breakthrough prevention data.
2Measurement precision
If the flood front monitoring accuracy is improved, then the breakthrough can be prevented, but the system complexity increases
Solution Approach 1:
The system replaces complex physical measurement devices with an intelligent software-based predictor-corrector filter. Instead of using multiple physical sensors or complex electromagnetic measurement systems, the invention uses a mathematical filter that processes data from existing distance measurement tools, significantly reducing hardware complexity while improving measurement accuracy through algorithmic correction.
Solution Approach 2:
The predictor-corrector filter changes the parameters of the distance measurement by introducing correction terms that adjust the raw measurements. The filter modifies the measurement parameters (distance, position, timing) through a mathematical transformation that accounts for system uncertainties, thereby improving accuracy without adding physical measurement components.
Data Source
AI summary
A method of detecting a flood front through a subterranean formation, comprising, measuring a distance to the flood front, processing the measured distance using a predictor-corrector filter to determine a corrected distance to the flood front, and adjusting a formation device based on the corrected distance to control a flow of the flood front.