Wellbore Stress Modeling for Lateral Drilling Accuracy
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Solution Overview
Problem
Existing wellbore modeling techniques fail to accurately account for stress field changes caused by the drilling of a main wellbore when simulating lateral wellbores, leading to reduced drilling efficiency and operational challenges.
Innovation Solution
A computer-implemented method and system that generate an initial wellbore model, simulate stress distributions during main wellbore formation, update the model to include a lateral wellbore, and recalculate stress distributions using a stress field assessment engine, which employs finite element analysis and geomechanical modeling to mimic actual drilling conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional wellbore modeling techniques are used that assume identical drilling experience for main and lateral wellbores, then the modeling process is simple and fast, but the accuracy of stress field representation deteriorates
Solution Approach 1:
The modeling process is segmented into distinct phases: first modeling the main wellbore stress field, then updating the model to incorporate lateral wellbores. This segmentation allows the complex problem to be broken down into manageable steps, maintaining accuracy while controlling complexity through systematic progression.
Solution Approach 2:
The main wellbore stress field is calculated in advance before lateral wellbores are introduced. This preliminary action establishes the baseline stress distribution that serves as the foundation for subsequent lateral wellbore modeling, ensuring that stress field changes are accurately captured without requiring complete remodeling.
2Reliability
If stress field changes from main wellbore drilling are accounted for in lateral wellbore modeling, then wellbore stability assessment improves, but computational time and resources increase
Solution Approach 1:
The main wellbore stress field is pre-calculated and stored before lateral wellbore analysis. This preliminary computation avoids redundant calculations when modeling lateral wellbores, significantly reducing computational time while maintaining the accuracy of stress field representation.
Solution Approach 2:
The main wellbore stress field model is copied and updated for lateral wellbore analysis rather than recalculating from scratch. This approach leverages the previously computed stress distribution as a basis for lateral wellbore modeling, reducing computational overhead while preserving reliability.
3Productivity
If a unified drilling approach is assumed for main and lateral wellbores, then operational procedures are simplified, but drilling efficiency deteriorates due to unaccounted stress disturbances
Solution Approach 1:
The model incorporates local stress field variations caused by main wellbore drilling into lateral wellbore planning. By accounting for localized stress disturbances at lateral wellbore locations, the system enables optimized drilling parameters and procedures that improve drilling efficiency while maintaining operational simplicity through automated adjustments.
Data Source
AI summary
In some examples, an initial wellbore model that includes a formation model and main wellbore model can be generated. The initial wellbore model can be simulated to compute stress distributions in the formation model caused during main wellbore model formation. The initial wellbore model can be updated to include a lateral wellbore model to provide an updated wellbore model in response to the simulation of the initial wellbore model. The updated wellbore model can be simulated to compute updated stress distributions in the formation model caused during lateral wellbore model formation using the determined stress distributions.