Nonradioactive Tracer Cement Integrity Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for determining the integrity of cement sections in wellbores are inadequate, particularly in detecting leaks or breaches without generating radioactive waste, which poses environmental concerns.
Innovation Solution
A wellbore system utilizing nonradioactive tracers that temporarily emit radioactive emissions when activated by a pulsed neutron source, allowing for the detection of breaches in the cement section through gamma ray detection, without producing enduring radioactive waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radioactive tracers are used to detect cement section breaches, then detection capability is improved, but radioactive waste is generated causing environmental harm
Solution Approach 1:
The patent uses nonradioactive tracer atoms as intermediaries that temporarily become radioactive when activated by neutron irradiation. These activated tracers then serve as the actual radioactive indicators for detection. This intermediary approach allows the system to achieve the detection sensitivity of radioactive tracers while avoiding the permanent radioactive waste problem, since the tracers only exhibit radioactivity temporarily during the detection window.
Solution Approach 2:
The patent changes the radioactive state parameter of the tracer atoms dynamically. The tracers transition from a nonradioactive state (when injected) to a radioactive state (when activated by neutrons) and then back to nonradioactive (as they decay). This parameter change allows the system to have radioactive properties only when needed for detection, eliminating persistent radioactive waste while maintaining detection capability.
2Object-affected harmful factors
If traditional cement integrity methods are used, then environmental safety is maintained, but detection accuracy of leaks is insufficient
Solution Approach 1:
The patent introduces tracer atoms as intermediary substances that migrate through cement breaches and can be detected with high precision. These tracers serve as mediators between the cement integrity state and the detection system, enabling accurate leak detection without compromising environmental safety since the tracers are nonradioactive until temporarily activated during the detection process.
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
Effectively determines the presence and location of breaches in cement sections, ensuring the integrity of wellbores during production and abandonment phases without generating radioactive waste, thus addressing environmental concerns.
Implementation Method 1
nonradioactive tracers placed in a fluid below the cement section that temporarily emit radioactive emission in response to an induced radioactive energy
Implementation Method 2
nonradioactive tracers placed in a fluid below the cement section that temporarily emit radioactive emission
Implementation Method 3
a detector for detecting the radioactive emission from the nonradioactive tracer
Data Source
AI summary
In one aspect, a wellbore system is disclosed for determining breach of cement section in the wellbore, wherein the system includes a cement section in the wellbore formed to prevent flow of fluids including hydrocarbons through the cement section, nonradioactive tracers that emit radioactive emission when activated by a radiation source, a radioactive source that generates radioactive particles to activate the nonradioactive tracers that have migrated through the cement to cause the nonradioactive tracers to emit radiation, a detector for detecting the radioactive emission from the nonradioactive tracer, and a processor that determines from the detected radioactive emission a fluid leak through the cement section.