Downhole Tracer Release Valve for Even Well Monitoring Injection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tracer injection systems for downhole use face limitations in controlling tracer release, require complex and costly well shut-ins, risk well infrastructure, and struggle with accurate data capture due to battery life and uneven tracer distribution, leading to incomplete flow analysis.
Innovation Solution
A tracer release system with a controllable valve and control unit to manage tracer release duration and frequency, allowing continuous and even tracer distribution without well shut-ins, using electromagnetic or electronically controlled valves and a biasing mechanism to extend tracer lifespan and improve data accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the well is shut in to build up high concentration of tracers, then tracer data can be obtained, but production is interrupted and revenue is lost
Solution Approach 1:
The system pre-loads tracer material into downhole reservoirs before production needs monitoring. This preliminary preparation allows tracer injection to occur continuously or periodically without shutting in the well, as the tracer is already staged and ready for release into the production flow.
Solution Approach 2:
The invention enables continuous tracer injection into the production flow through controlled release from downhole reservoirs. This continuous action eliminates the need for periodic shut-ins to accumulate tracer, maintaining both production continuity and tracer data quality.
2Measurement precision
If the well is shut in for extended periods, then tracer concentration builds up, but complex pressure and temperature changes threaten equipment
Solution Approach 1:
Tracer is pre-loaded into downhole reservoirs before need, eliminating extended shut-in periods. The controlled release mechanism provides tracer at required concentrations without subjecting equipment to the harmful pressure and temperature changes associated with prolonged well shut-ins.
3Measurement precision
If tracer is injected at high concentration, then data quality improves, but tracer depletes faster
Solution Approach 1:
The system dynamically adjusts tracer release rates through controllable valves or flow control devices. This allows optimization of tracer concentration in the production flow to achieve sufficient data quality while minimizing overall tracer consumption and extending the operational lifespan of the tracer supply.
Solution Approach 2:
The invention changes the temporal distribution of tracer release parameters, switching from periodic high-concentration pulses requiring shut-ins to continuous or frequent low-concentration injections. This parameter optimization maintains measurement precision while extending tracer lifespan.
4Measurement precision
If tracer release is not precisely controlled, then data accuracy suffers, but release control mechanisms add complexity
Solution Approach 1:
The downhole tracer release system is designed to be self-regulating, using the natural production flow to carry tracer to surface. Simple passive mechanisms such as flow-controlled release or pressure-driven injection eliminate the need for complex active control systems, maintaining data accuracy while minimizing device complexity.
Data Source
AI summary
The invention provides a tracer release system for releasing tracer into a well. The tracer release system comprises at least one tracer release apparatus. The apparatus comprises at least one tracer source reservoir comprising at least one tracer, at least one injection port configured to be in fluid communication with the well; and at least one controllable valve located between the at least one tracer source reservoir and the at least one injection port. The at least one controllable valve is configured to control an even release of the at least one tracer into the well for a desired duration and/or frequency.