Interwell Logging Communication for Multi-Well 3D Reservoir Imaging
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Solution Overview
Problem
Conventional well logging technologies are limited to single-well measurements, providing one-sided information and lacking accuracy in detecting oil, gas, and water distribution in regional or interwell formations, which is crucial for monitoring changes during oil and gas development processes.
Innovation Solution
A multiwell-based interwell logging communication system with a central station and satellite stations, utilizing a ground transmitter and downhole transmitter/receiver pairs for point-to-point communication and beacon signal-based control to enable three-dimensional imaging and data collection across multiple wells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If single well measurement is used, then the device complexity is low, but the measurement precision and information completeness deteriorate
Solution Approach 1:
The system divides the measurement task into multiple independent well units, each equipped with downhole transmitters and receivers that operate autonomously. Each well functions as an independent measurement segment, collectively forming a comprehensive interwell measurement network that achieves three-dimensional imaging without requiring a single complex centralized system
Solution Approach 2:
The downhole transmitters and receivers are designed with multi-functional capabilities, serving both as signal sources and detection devices within each well. The same hardware platform performs multiple functions including signal transmission, signal reception, and data collection, reducing the need for separate specialized equipment in each well
2Measurement precision
If software processing-based three-dimensional imaging is used, then the device complexity is low, but the measurement precision deteriorates
Solution Approach 1:
The patent introduces dedicated downhole transmitters and receivers as intermediary devices positioned within the wells to directly measure formation properties. These intermediary measurement devices bridge the gap between surface equipment and subsurface formations, providing direct physical measurement data that serves as the foundation for three-dimensional imaging, thereby improving accuracy over purely software-based methods
3Loss of information
If interwell multiwell measurement with three-dimensional imaging is implemented, then the measurement precision and information completeness improve, but the device complexity increases
Solution Approach 1:
The system implements feedback mechanisms where downhole receivers detect signals from transmitters in other wells and feed back measurement data to surface equipment. This feedback loop enables real-time monitoring and adjustment of measurement parameters, ensuring complete and accurate collection of regional formation information while maintaining system coordination through standardized communication protocols
Data Source
AI summary
A multiwell-based interwell logging communication system has a central station and a plurality of satellite stations. The central station has a mobile base station, a central terminal, a ground transmitter for establishing an information transmission link between the central station and each satellite station via broadcast through the mobile base station and the central terminal, a downhole transmitter for receiving a basic beacon signal transmitted from the ground, completing transmission operation in interwell logging based on the basic beacon signal, and realizing communication and control inside a transmitting well in the interwell logging. Each of the satellite stations has a satellite station terminal on the ground, a ground receiver and a downhole receiver. The ground receiver is in point-to-point communication with the ground transmitter through the satellite station terminal so as to control the downhole receiver. The downhole receiver completes reception and collection operations in the interwell logging.