Real-Time Wellbore Model Updates Using Caliper Measurements
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Solution Overview
Problem
Existing directional drilling systems face challenges in accurately steering the drill bit due to uncertainties in hole enlargement and wellbore geometry, leading to suboptimal drilling parameters and potential tool wear.
Innovation Solution
A method and system that involve real-time dimension measurements of the wellbore using calipers, which update the drilling tool's performance model to adjust drilling parameters such as weight on bit, flow rate, and effective steering control, ensuring precise steering and alignment with the well plan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If pre-job performance models with estimated hole enlargement are used, then drilling parameters can be planned in advance, but the accuracy of steering control deteriorates due to uncertainties in wellbore geometry
Solution Approach 1:
Pre-job performance models are created with estimated hole enlargement values before drilling begins, allowing advance planning of drilling parameters while acknowledging the need for later updates based on actual measurements
Solution Approach 2:
Real-time caliper measurements provide feedback on actual wellbore geometry, which is then used to update the performance model and adjust drilling parameters dynamically, closing the loop between estimation and measurement
2Measurement precision
If real-time caliper measurements are taken to update performance models, then steering accuracy improves, but device complexity increases
Solution Approach 1:
The drilling tool combines multiple functions including drilling, real-time caliper measurements, and performance model updates within a single integrated system, reducing the need for separate measurement tools and operations
Solution Approach 2:
The system automatically updates the performance model using real-time caliper measurements without requiring external intervention, and autonomously adjusts drilling parameters based on the updated model
3Duration of action of stationary object
If drilling parameters are adjusted in real-time based on updated models, then tool wear is reduced, but loss of time in parameter adjustment increases
Solution Approach 1:
The performance model is updated continuously during drilling operations using real-time caliper measurements, allowing seamless adjustment of drilling parameters without interrupting the drilling process
Solution Approach 2:
Drilling parameters are dynamically adjusted in real-time based on current wellbore conditions and updated performance models, allowing the system to adapt to changing conditions without stopping operations
Data Source
AI summary
The disclosure recognizes the benefit in determining the dimensions of a wellbore for updating a performance model and changing drilling parameters in real time for steering a drill bit. The disclosed system and method provide improved control for steering a drill bit by obtaining dimension measurements of the wellbore proximate a drill bit and considering the dimension measurements to adjust one or more of the drilling parameters in real time. A method of drilling a wellbore a drilling system, and a drilling tool are disclosed herein. In one example, the method includes: (1) receiving dimension measurements of a wellbore during drilling of the wellbore by a drilling tool, (2) updating an existing performance model of the drilling tool in real time based on the dimension measurements, and (3) operating the drilling tool based on the updated performance model.