Dynamic Underbalance Control for Perforating Tool Testing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current perforating tool systems for subterranean hydrocarbon extraction are often selected based on limited data, particularly regarding downhole charge performance, leading to suboptimal selection and configuration, which can result in reduced hydrocarbon recovery and increased risk of perforation tunnel collapse or sand flow.
Innovation Solution
The implementation of a dynamic underbalance (DUB) control system in perforating tool testing and simulation, utilizing an optical splash communication system and adjustable wellbore chamber volumes to optimize perforation tunnel creation and prevent collapse, by simulating downhole conditions and adjusting free gun volume in a perforator gun.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If perforating tool systems are selected based on limited API RP 19B Section 1 test data, then the selection process is simple and quick, but the selection accuracy and downhole charge performance prediction are insufficient
Solution Approach 1:
The system dynamically adjusts wellbore chamber volume during testing to simulate different downhole conditions, enabling accurate prediction of charge performance across varying operational scenarios rather than relying on static test data
Solution Approach 2:
The invention creates a scaled-down simulated wellbore environment that replicates downhole conditions, allowing accurate prediction of full-scale charge performance through proportional testing models
2Measurement precision
If cement penetration is used as the primary selection criterion, then the selection process is straightforward, but it does not correlate to actual downhole penetration or inflow potential
Solution Approach 1:
The system performs multiple sequential tests including charge detonation, penetration measurement, and inflow potential evaluation to continuously gather comprehensive performance data rather than relying on a single cement penetration measurement
Solution Approach 2:
The testing system varies multiple parameters including wellbore chamber volume, charge configuration, and formation properties to evaluate how these changes affect penetration and inflow potential, providing a more complete performance picture
3Productivity
If dynamic underbalance control is implemented through adjustable wellbore chamber volume, then perforation tunnel quality and hydrocarbon production are improved, but the device complexity and operational requirements increase
Solution Approach 1:
The wellbore chamber volume is made dynamically adjustable to optimize dynamic underbalance control during different phases of the testing process, enabling better perforation tunnel creation while maintaining manageable operational complexity through systematic control procedures
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
This approach ensures maximum hydrocarbon production and injection efficiency by creating a clean, open perforation tunnel, reducing pressure drops, and minimizing sand flow, thereby enhancing the reliability and effectiveness of perforating tool systems.
Implementation Method 1
utilizing an optical splash communication system
Implementation Method 2
dynamic underbalance (DUB) control system in perforating tool testing and simulation, utilizing an optical splash communication system and adjustable wellbore chamber volumes to optimize perforation tunnel creation and prevent collapse
Implementation Method 3
detonating the one or more explosive charges to create a perforation in the formation sample
Data Source
AI summary
To optimize the efficiency of a perforating tool system, downhole conditions may be simulated to determine the optimal configuration for the perforating tool system. A simulated wellbore is disposed in a simulated wellbore case and coupled to a formation sample. The simulated wellbore comprises the perforating tool system and one or more filler discs that consume a volume of the simulated wellbore. The filler discs are used to control the dynamic underbalance for a given simulation of a perforating tool system. One or more measurements associated with the perforating tool system along with one or more images may be generated after explosive charges of the perforating tool system are detonated. The perforating tool system may be modified based, at least in part, on the one or more measurements and the one or more images for the specific dynamic underbalance of the simulation.