Shaped-Charge Tracer Delivery for Wellbore Flow Mapping
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Solution Overview
Problem
Existing diagnostic methods for wellbore performance, particularly in unconventional reservoirs, are costly, environmentally challenging, and temperature-limited, lacking a versatile, affordable, and accurate means to assess reservoir quality and wellbore performance without hydraulic fracturing.
Innovation Solution
A method using a shaped charge with a tracer additive, comprising a tracer composition of 0.01 μm to 10 μm solid nanoparticles with 0.6 g/cm³ to 1.6 g/cm³ specific gravity, integrated into the explosive material or liner, to disperse into the formation and allow for non-intrusive, rapid analysis of wellbore performance through fluorescence response-based techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional diagnostic methods (fiber-optic, chemical tracers) are used to assess wellbore performance, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent uses disposable nanoparticle tracers that are injected into the formation and then recovered with produced fluids. These inexpensive, single-use tracers eliminate the need for expensive, complex diagnostic equipment like fiber-optic cables or reusable chemical tracer systems, while still providing accurate flow performance data from individual perforations.
Solution Approach 2:
The patent replaces complex mechanical diagnostic systems (fiber-optic sensing, chemical tracer analysis equipment) with a simpler approach using nanoparticle tracers detected through fluorescence or other analytical methods on recovered fluids. This substitution reduces device complexity while maintaining measurement precision.
2Productivity
If hydraulic fracturing is performed to stimulate production, then productivity is improved, but loss of substance (water and sand) and environmental harm increase
Solution Approach 1:
The patent enables diagnostic assessment of wellbore performance and flow performance from individual perforations without requiring full hydraulic fracturing. By using nanoparticle tracers that can be injected and recovered with minimal fluid volumes, the system provides sufficient diagnostic information to evaluate whether fracturing is truly necessary, thereby avoiding unnecessary loss of fracturing fluids and proppant.
3Measurement precision
If conventional chemical tracers are used for wellbore diagnostics, then measurement precision is improved, but object-generated harmful factors (environmental contamination) increase
Solution Approach 1:
The patent uses nanoparticle tracers that are designed to be inert, non-toxic, and easily recoverable with produced fluids. These disposable tracers eliminate the environmental contamination issues associated with conventional chemical tracers while maintaining measurement precision through their unique optical or magnetic properties that allow detection at very low concentrations.
Solution Approach 2:
The nanoparticle tracers are designed to be chemically inert and non-reactive with formation fluids or environment, similar to using an inert atmosphere. This prevents harmful chemical interactions and environmental contamination while still allowing the tracers to serve their diagnostic function through physical detection methods.
4Temperature
If existing diagnostic methods are used in high-temperature environments, then measurement precision deteriorates, but the need for temperature-resistant equipment increases complexity
Solution Approach 1:
The nanoparticle tracers are designed to be thermally stable and maintain their diagnostic properties in high-temperature environments. As disposable elements that are injected and recovered with produced fluids, they can withstand downhole temperatures without degrading, providing consistent measurement precision across a wide temperature range without requiring complex temperature-resistant equipment.
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
Provides a cost-effective, accurate, and rapid assessment of wellbore performance, suitable for high-temperature environments, decoupled from hydraulic fracturing, enabling efficient diagnostic information without the need for expensive fiber-optic or chemical tracers.
Implementation Method 1
the explosive material jet stream comes into contact with at least some of the tracer additive
Implementation Method 2
A shaped charge with a tracer additive associated therewith
Implementation Method 3
testing the sample to analyze the sample and provide an indication related to performance of the wellbore using fluorescence response-based techniques
Data Source
AI summary
A method of using a tracer additive in a wellbore that includes using a perforator device, the perforator device having an at least one shaped charge associated with the tracer additive. The method includes deploying the perforator device into the wellbore in manner whereby the perforator device arrives at a desired location, and sufficiently detonating an explosive material of the shaped charge so that the tracer additive comes into contact with a target formation. The tracer additive has a first composition, and is in powder form.