Bridging Material Durability Testing via Laser Particle Analysis
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Solution Overview
Problem
Current methods lack a reliable, accurate, and efficient way to evaluate the durability of sized bridging materials used in drill-in fluids, leading to variations in particle size distribution during drilling operations, which can cause formation damage and reduce well productivity.
Innovation Solution
A laboratory method involving a cylindrical testing cell with a motorized roller and laser particle size analyzer to simulate downhole conditions and measure the shift factor of bridging materials, comparing control and wet grinding samples to determine structural durability and select appropriate bridging materials for maintaining desired particle distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bridging materials are used in drill-in fluid to prevent fluid loss and minimize formation damage, then formation damage is reduced and well productivity is improved, but the bridging materials may disintegrate and decompose under extreme downhole conditions, causing particle size distribution to change and leading to further formation damage
Solution Approach 1:
The patent performs preliminary laboratory testing of bridging materials to evaluate their durability and determine appropriate sizing before they are used in actual drilling operations. This preliminary action allows selection of materials that maintain their particle size distribution under simulated downhole conditions, preventing disintegration during actual use and ensuring consistent formation protection performance
2Measurement precision
If current quality control methods are used for bridging materials, then some level of material selection is possible, but there is no industry standard test method to accurately monitor particle size distribution or evaluate durability, leading to variations in performance
Solution Approach 1:
The patent segments the quality control process into distinct components: a durability testing system that simulates downhole conditions, a particle size analysis system using laser diffraction, and a data evaluation system. This segmentation allows each component to be optimized independently while working together to provide comprehensive, accurate evaluation of bridging material performance without requiring overly complex integrated systems
3Productivity
If bridging materials decompose into smaller particles during drilling, then the intended size distribution is lost, but this decomposition can be monitored and evaluated to select materials with optimal durability
Solution Approach 1:
The patent implements feedback by measuring particle size distribution of bridging materials before and after durability testing, comparing the results to evaluate material performance. This feedback mechanism allows selection of materials that maintain their integrity under downhole conditions, ensuring consistent drilling efficiency and preventing formation damage from decomposed particles
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 method allows for the selection of appropriate bridging materials, reducing formation damage, mud treatment costs, and maintaining desired particle distribution, thereby enhancing drilling efficiency and minimizing filtrate loss and internal mudcake buildup.
Implementation Method 1
laser particle size analyzer to measure the shift factor of bridging materials
Data Source
AI summary
A method for quality control and quality assurance of sized bridging materials rotates a control sample having a fluid portion and a solids portion of sized bridging materials in a tubular container for a predetermined period of time. The control sample is then analyzed in a laser particle size analyzer to determine a particle size distribution for the control sample. A wet grinding sample having a fluid portion and a solids portion of the sized bridging materials is then rotated in the tubular container with a loose cylinder rod for a predetermined time to simulate borehole conditions. The wet grinding sample is then analyzed in the laser particle size analyzer to determine a particle size distribution for the wet grinding sample. The two particle size distributions are used to define a shift factor that represents the relative strength of the sized bridging materials.