Self-guided geosteering assembly for precise well trajectory control
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Solution Overview
Problem
Conventional geosteering approaches are limited in precision and responsiveness, leading to suboptimal placement of wellbores in shale reservoirs due to reliance on slow data transmission and lack of forward-looking capabilities, resulting in tortuous wellbores and reduced production efficiency.
Innovation Solution
A self-guided geosteering assembly equipped with on-board circuitry, computer algorithms, and real-time data analysis to maintain the correct well trajectory based on a pre-programmed earth model, utilizing a CPU guidance system, stratigraphic sensing, earth locator, imaging tool, and directional controller to adjust the drill bit path dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional geosteering approaches using downhole sensors and surface telemetry are used, then data about rock quality can be obtained, but the response time is delayed and the wellbore placement precision deteriorates
Solution Approach 1:
The drilling assembly performs geosteering operations autonomously using onboard processing circuitry that receives sensor data, determines well path deviations, and adjusts the well path without requiring surface intervention. This self-service capability eliminates the time delay associated with surface-based data transmission and interpretation, while maintaining high placement precision through continuous real-time adjustments.
Solution Approach 2:
The processing circuitry is pre-programmed with a target well path and evaluation criteria before deployment. During operation, it continuously compares actual well path data against the pre-defined target path and proactively makes adjustments before significant deviations occur, ensuring precise wellbore placement without waiting for surface analysis.
2Measurement precision
If real-time data analysis and dynamic adjustment capabilities are added to the drilling assembly, then wellbore placement precision is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple functions (sensor data acquisition, real-time processing, well path determination, and directional control) into a single integrated geosteering assembly deployed downhole. This merging eliminates the need for separate surface-based systems and reduces overall system complexity while achieving precise wellbore placement through unified real-time operation.
Solution Approach 2:
The patent replaces complex mechanical surface-based geosteering systems with an electronically-controlled downhole assembly. The processing circuitry uses electronic sensors and automated control algorithms to determine and adjust the well path, substituting manual surface operations with automated electronic systems that reduce complexity while improving precision.
Data Source
AI summary
A self-guided geosteering assembly having an on-board, automated guidance system that incorporates a detailed subsurface earth model and well path to geosteer the assembly along a formation. While advancing along the formation, the guidance system continually monitors data related to formation characteristics and the formation/tool location, compares the data to the earth model and well path, and adjusts the direction of the assembly accordingly. In addition, the data may be utilized to update the earth model in real-time.