Well Evaluation Pill for Interval-Specific Formation Characterization
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Solution Overview
Problem
Current methods for monitoring and characterizing subterranean formations and drilling fluids are limited in detecting specific components due to the type of drilling fluid used and the inability to determine component presence at specific intervals within the well bore, leading to inaccurate analysis and potential masking of other components.
Innovation Solution
Introducing a well evaluation pill with specific properties that interact with components in the formation, allowing for detection of changes in composition or properties when circulated back to the surface, enabling more accurate characterization of the formation fluids and operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drilling fluid is circulated throughout the entire well bore, then the well bore can be effectively drilled and controlled, but it becomes impossible to determine if a particular species is present at a specific interval
Solution Approach 1:
The patent divides the well bore into discrete intervals by introducing pills at specific depths. Each pill is confined to a particular interval using packing elements and pressure differentials, allowing independent evaluation of formation characteristics at different locations without interference from fluid circulation throughout the entire well bore.
Solution Approach 2:
The patent applies local quality by using pills with specific properties (density, composition, magnetic characteristics) tailored for evaluation at particular intervals. The well evaluation pill contains additives like ferromagnetic materials that enable localized detection and characterization at the specific interval where the pill is introduced.
2Quantity of substance
If drilling fluid is used to absorb or dissolve formation components, then more components can be detected, but other components present in smaller quantities may be masked
Solution Approach 1:
The patent uses a well evaluation pill as an intermediary substance that contains specific additives (such as ferromagnetic materials, fluorescent compounds, or other detectable tracers) to enhance the detection of formation components. This intermediary allows for sensitive detection of trace components without the masking effect that occurs when using standard drilling fluids to dissolve all components.
Solution Approach 2:
The patent employs pills containing additives that undergo detectable changes (such as color changes, fluorescence, or magnetic property changes) when they interact with specific formation components. This enables precise detection of trace components through these physical or chemical changes, maintaining measurement precision even when detecting small quantities of substances.
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 provides more accurate and localized analysis of subterranean formations, allowing for real-time identification of components and optimization of drilling operations, enhancing the reliability of fluid characterization and operational efficiency.
Implementation Method 1
many components present in the formation may not be detected in the drilling fluid if the type of drilling fluid used is not capable of absorbing or dissolving those components
Implementation Method 2
a density of the well evaluation pill is different from that of the drilling fluid
Data Source
AI summary
Systems and methods for monitoring and characterizing well bores, subterranean formations, and/or fluids in a subterranean formation using well evaluation pills are provided. In one embodiment, the methods comprise: introducing a well evaluation pill into a portion of a well bore penetrating a portion of a subterranean formation; allowing the well evaluation pill to interact with one or more components in the portion of the subterranean formation; detecting a change in the composition or properties of the well evaluation pill; and determining the presence of one or more components in the portion of the subterranean formation based at least in part on the detected change in the composition or properties of the well evaluation pill.