Wellbore Parameter Rescaling for Horizontal Drilling Optimization
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Solution Overview
Problem
Existing drilling technologies struggle to optimize drilling parameters in horizontal wells due to variations in well inclination and formation thickness, leading to inefficiencies and suboptimal penetration rates.
Innovation Solution
A method that involves measuring geological topsets and formation horizons from offset wells, rescaling drilling parameters using Hole Depth Equivalent (HDE) for vertical and deviated sections and True Vertical Thickness (TVT) for horizontal sections, and dynamically adjusting parameters based on real-time downhole sensor data to optimize the rate of penetration (ROP).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If drilling parameters are optimized using conventional methods for vertical wells, then drilling efficiency is maintained for vertical sections, but drilling performance deteriorates in horizontal sections due to inclination variations
Solution Approach 1:
The patent implements dynamic adjustment of drilling parameters based on real-time well inclination and formation characteristics. The system continuously monitors inclination angle and automatically rescales drilling parameters (WOB, RPM, mud flow rate) to optimize performance across varying well sections, transitioning from static conventional parameters to dynamic adaptive parameters.
Solution Approach 2:
The patent applies parameter transformation by rescaling drilling parameters according to well inclination angle. When inclination exceeds a predetermined threshold, the system transforms parameters from vertical well equivalents to horizontal well equivalents using trigonometric relationships, changing the parameter values to match the specific geometric conditions of each well section.
2Productivity
If drilling parameters are scaled to true vertical thickness for horizontal wells, then rate of penetration is improved, but drilling time increases due to extended lateral sections
Solution Approach 1:
The patent divides the wellbore into distinct vertical and horizontal sections based on inclination thresholds. Different scaling methods are applied to each segment: conventional vertical well parameter scaling for vertical sections and true vertical thickness scaling for horizontal sections. This segmentation allows optimization of ROP in horizontal sections without unnecessarily extending drilling time in vertical sections.
Solution Approach 2:
The patent applies different parameter scaling strategies to different spatial locations within the wellbore. Vertical sections use one scaling approach while horizontal sections use another, ensuring that each local section benefits from the most appropriate scaling method for its specific geometric characteristics rather than applying a uniform scaling approach throughout.
3Productivity
If real-time monitoring and dynamic adjustment of drilling parameters is implemented, then drilling optimization is improved, but system complexity increases
Solution Approach 1:
The patent implements a feedback control system where real-time measurements of well inclination, formation characteristics, and drilling parameters are continuously monitored and fed back to the control system. The system automatically adjusts drilling parameters based on this feedback loop, optimizing performance while managing complexity through automated closed-loop control rather than manual intervention.
Solution Approach 2:
The patent replaces complex manual drilling parameter adjustment mechanisms with automated computational systems. Instead of relying on manual interpretation and adjustment by drill operators, the system uses computer algorithms to automatically rescale parameters and control drilling equipment, reducing operational complexity while improving optimization capabilities.
4Productivity
If inclination threshold for parameter rescaling is set lower, then more sections benefit from optimized scaling, but unnecessary adjustments increase in vertical sections
Solution Approach 1:
The patent establishes predetermined inclination thresholds before drilling operations begin, based on geological models and well planning data. These pre-defined thresholds allow the system to anticipate when parameter rescaling should occur, enabling proactive adjustment rather than reactive adjustment, thus reducing unnecessary adjustments and optimizing the transition points between scaling methods.
Data Source
AI summary
A method for optimizing a wellbore model that measures a plurality of topsets and horizons in one or more offset well that correspond to a plurality of drilling parameters by depth, using those measured topsets and horizons to plan a well by rescaling depths of the drilling parameters if the inclination of the well corresponds to a vertical inclination or scaling the drilling parameters to their true vertical thickness if the inclination of the well corresponds to a horizontal inclination.