Dynamic Allocation Factor Calculation for Waterflooding
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Solution Overview
Problem
Conventional waterflooding monitoring techniques rely on static assumptions about allocation factors, leading to inaccurate results and sub-optimal hydrocarbon production due to dynamic changes in injection rates and well configurations.
Innovation Solution
Dynamic calculation of allocation factors based on characteristics such as injection rates, distances, and wellbore radii of injector wells, using a controller to compute proportionate fluid production for each producer well, allowing for real-time adjustments in waterflooding operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If static assumptions about allocation factors are used in waterflooding monitoring, then the monitoring system is simple and easy to operate, but the calculation accuracy of voidage replacement ratio and production decisions become inaccurate
Solution Approach 1:
The patent applies the dynamics principle by transitioning from static allocation factors to dynamic allocation factors that automatically adjust based on real-time well characteristics. The system continuously monitors injection rates, wellbore radii, and distances to compute updated allocation factors, ensuring the voidage replacement ratio calculations reflect current operational conditions rather than relying on fixed historical assumptions.
Solution Approach 2:
The patent implements parameter changes by modifying the allocation factor calculation to incorporate variable parameters such as injection rate, wellbore radius, and distance between wells. Instead of using constant assumed values, the system dynamically adjusts these parameters based on actual measured data from the waterflooding operation, thereby improving calculation accuracy without requiring complete system redesign.
2Reliability
If dynamic calculation of allocation factors is implemented, then the accuracy of production monitoring improves, but the computational complexity and data processing requirements increase
Solution Approach 1:
The patent applies feedback by establishing a closed-loop monitoring system where allocation factors are continuously calculated based on real-time injection rates and well characteristics, and these updated factors are immediately used to recalculate the voidage replacement ratio. This feedback mechanism ensures that the monitoring system adapts to changing operational conditions, improving reliability by reflecting actual reservoir performance rather than relying on static assumptions.
Solution Approach 2:
The system implements self-service by automatically computing allocation factors and voidage replacement ratios using real-time data from the waterflooding operation. The methodology enables the monitoring system to self-adjust and self-correct without requiring manual intervention or complex external computational resources, thereby improving reliability through automated real-time calculations while managing system complexity.
3Productivity
If allocation factors are based on well characteristics such as injection rates and distances, then the production optimization becomes more accurate, but the monitoring and measurement requirements become more stringent
Solution Approach 1:
The patent applies universality by designing a monitoring system that uses multi-functional measurements of well characteristics (injection rates, wellbore radii, distances) for multiple purposes. The same measured parameters are used both to calculate allocation factors and to monitor overall waterflooding performance, thereby improving production optimization accuracy without requiring separate specialized measurement systems for each parameter.
Data Source
AI summary
To monitor performance of wells, allocation factors are dynamically calculated for a particular producer well with respect to plural respective well patterns each including at least one corresponding injector well. The allocation factors represent a production characteristic of the particular producer well in the respective well patterns.