Multipoint Wellbore Ranging via Transmitter Arrays
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Solution Overview
Problem
Current methods for calculating spatial characteristics of new wellbores relative to existing wellbores, such as distance, direction, and curvature, are inefficient and lack precision, particularly in complex drilling operations like steam assisted gravity drainage (SAGD) where accurate wellbore placement is crucial for efficient hydrocarbon extraction.
Innovation Solution
The method involves introducing an array of transmitters into a completed wellbore to generate electromagnetic signals, which are received by sensors in a new wellbore, allowing for the calculation of spatial characteristics through analysis of the magnetic fields, using inversion algorithms to determine distance, direction, and curvature, and employing electromagnetic simulations to validate the accuracy of wellbore placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional single-point signal transmission methods are used, then the device complexity is low, but the measurement precision of spatial characteristics deteriorates
Solution Approach 1:
The transmitter is divided into multiple spatially separated transmitter elements arranged in an array configuration. Each transmitter element transmits signals at different positions, enabling multi-point measurements that improve the precision of spatial characteristics calculation through differential analysis of signal arrivals at the receiver
Solution Approach 2:
The system transitions from single-point transmission to multi-point transmission by adding spatial dimensionality to the transmitter arrangement. The transmitter elements are positioned at different locations (e.g., different depths or radial positions) to create a three-dimensional measurement geometry that enhances measurement precision
2Measurement precision
If multiple transmitters are deployed in an array, then the measurement precision improves, but the ease of operation deteriorates
Solution Approach 1:
Multiple transmitter elements are combined into a single integrated transmitter array system that functions as one coordinated unit. The transmitters are inserted together as a collective assembly and operated through unified control, simplifying the operational procedure while maintaining the measurement precision benefits of multi-point transmission
Solution Approach 2:
The transmitter array system automatically performs signal coordination and timing synchronization without requiring complex external intervention. The system self-manages the transmission sequence and signal processing, reducing the operational burden on operators while achieving high-precision measurements
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 enables precise and efficient calculation of spatial characteristics between wellbores, ensuring optimal wellbore placement and alignment, thereby enhancing the efficiency and safety of hydrocarbon extraction operations.
Implementation Method 1
a transmitter or array of transmitters introduced into a completed wellbore generates a magnetic field
Implementation Method 2
a receiver or array of receivers introduced into a new wellbore receives the magnetic field
Data Source
AI summary
A system for well comparison, comprising at least one electromagnetic field generator shaped for insertion into a first well and capable of generating an electromagnetic field; at least one detector capable of measuring in the second well the field generated in the first well; wherein the first well is substantially perpendicular to the second well; and wherein measurements of the field of the at least one generator are capable of being used to calculate a distance, direction or curvature of the second well with respect to the first well.