Acoustic Wellbore Delineation in Adverse Downhole Conditions
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Solution Overview
Problem
Accurately delineating the path of existing wellbores and predicting the trajectory of wellbores during drilling is challenging due to adverse downhole conditions affecting sensor accuracy in the hydrocarbon recovery industry.
Innovation Solution
A method and system using acoustic waves emitted from a tool in a first wellbore to determine the orientation and distance of a second wellbore, employing acoustic emitters and receivers with a processor to analyze reflected waves, allowing for real-time feedback and steering adjustments during drilling operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors in the drill string near the bit are used to send positional data uphole, then wellbore trajectory can be tracked, but accuracy is affected by adverse conditions encountered downhole
Solution Approach 1:
The patent introduces acoustic waves as an intermediary medium to transmit wellbore trajectory information from the drill string to the surface. Instead of relying on direct sensors in adverse downhole conditions, acoustic waves carry positional data through the formation, bypassing the harmful effects of downhole environments on sensor accuracy.
Solution Approach 2:
The patent replaces the mechanical sensor-based positioning system with an acoustic wave-based system. By substituting mechanical sensors that directly measure position in the drill string with acoustic waves that transmit information through the formation, the system eliminates the impact of adverse mechanical conditions downhole on measurement accuracy.
2Measurement precision
If acoustic waves are emitted from a tool in the first wellbore to determine the orientation and distance of a second wellbore, then real-time mapping and prediction of wellbore trajectories is enabled, but device complexity increases
Solution Approach 1:
The acoustic tool performs multiple functions: it emits acoustic waves, receives reflected waves, and processes the data to determine both the orientation and distance of the second wellbore. This multi-functionality reduces the need for separate dedicated systems for each measurement type, thereby managing complexity while achieving comprehensive measurement capabilities.
Solution Approach 2:
The system uses reflected acoustic waves to obtain real-time feedback about the second wellbore's position and orientation. This feedback mechanism allows the system to continuously update the wellbore trajectory map and make real-time steering adjustments, enabling accurate measurement despite the added complexity of the acoustic system.
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
Enables accurate, real-time mapping and prediction of wellbore trajectories, improving drilling precision and enabling effective steering to maximize hydrocarbon production by reducing processing complexity and enhancing accuracy in adverse conditions.
Implementation Method 1
emitting acoustic waves from a tool in the first wellbore
Implementation Method 2
receiving acoustic waves at the tool reflected from the second wellbore
Data Source
AI summary
Disclosed herein is a method of delineating a second wellbore from a first wellbore. The method includes, emitting acoustic waves from a tool in the first wellbore, receiving acoustic waves at the tool reflected from the second wellbore, and determining orientation and distance of at least a portion of the second wellbore relative to the tool.