Closed-loop Drilling Parameter Control Using Formation Models
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Modern petroleum drilling operations face challenges in precisely locating and efficiently drilling hydrocarbon reservoirs, as existing methods struggle to accurately control drilling parameters within mechanical and operational limits, especially in complex formations.
Innovation Solution
The implementation of an information handling system and control unit that uses an earth model and offset data to generate operating constraints, allowing for real-time adjustments of drilling parameters such as weight-on-bit, torque-on-bit, and rotation rate through control signals to maintain optimal drilling conditions and prevent issues like drill bit whirl.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If real-time control of drilling parameters is implemented, then drilling precision and efficiency are improved, but system complexity increases
Solution Approach 1:
The system continuously monitors drilling parameters (weight on bit, torque on bit, rotation rate) and compares them against operating constraints in real-time, automatically adjusting parameters when deviations are detected to maintain optimal drilling conditions
Solution Approach 2:
The control system autonomously determines operating constraints based on formation models and offset data, then self-regulates drilling parameters without continuous human intervention, allowing the system to manage itself within safe operational boundaries
2Reliability
If drilling parameters are strictly controlled within operating constraints, then equipment safety and reliability are improved, but drilling speed and productivity may be reduced
Solution Approach 1:
The system dynamically adjusts drilling parameters within the operating constraint envelope rather than maintaining fixed values, allowing maximum drilling speed while staying within safe limits, and adapting in real-time as conditions change
Solution Approach 2:
The system changes drilling parameters (weight on bit, torque on bit, rotation rate) continuously within acceptable ranges to optimize both safety and productivity, adjusting the balance between these competing objectives based on real-time conditions
3Measurement precision
If complex formation models and offset data are used to determine operating constraints, then control accuracy is improved, but processing time and computational requirements increase
Solution Approach 1:
Operating constraints are determined in advance based on formation models and offset data before drilling operations begin, allowing real-time control to reference pre-calculated safety envelopes without complex computations during critical drilling operations
Data Source
AI summary
An example method for control of a drilling assembly includes receiving measurement data from at least one sensor coupled to an element of the drilling assembly positioned in a formation. An operating constraint for at least a portion of the drilling assembly may be determined based, at least in part, on a model of the formation and a set of offset data. A control signal may be generated to alter one or more drilling parameters of the drilling assembly based, at least in part, on the measurement data and the operating constraint. The control signal may be transmitted to a controllable element of the drilling assembly.