Method for drilling wellbores utilizing drilling parameters optimized for stick-slip vibration conditions
AssigneeExxonMobil Upstream Research Company
InventorsJeffrey R. Bailey, Gregory S. Payette
Life of this patent
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Abstract
The present disclosure relates generally to the field of drilling operations. More particularly, the present disclosure relates to methods for drilling wells utilizing drilling equipment, more particularly drill string assemblies, and making adjustments to drilling parameters during the drilling operation based on analysis of the drilling data. Included are methods for the selection of modified drilling parameters to mitigate torsional vibration dysfunction.
Claims21
A method for drilling a wellbore in a subterranean formation, comprising:
- identifying a first interval having torsional vibration within a wellbore;
- calculating representative values for drilling parameters for the first interval;
- determining Torque Swing Ratio values for the drilling parameters for the first interval, wherein the Torque Swing Ratio is one of specific torque swing, normalized specific torque swing, and a combination thereof;
- determining a reference value for the Torque Swing Ratio at full stick-slip for a drill string;
- determining a Stick-Slip Design Factor (SSDF) and a drilling parameter threshold for a second interval, wherein the SSDF is based on the Torque Swing Ratio values and the reference value;
- monitoring drilling parameters for the second interval;
- determining Torque Swing Ratio values from the drilling parameters for the second interval;
- and
- managing a drilling operation for the second interval based on the drilling parameter threshold and a comparison of the determined Torque Swing Ratio values for the second interval with the Torque Swing Ratio reference value.
A drilling rig system for drilling a wellbore in a subterranean formation, comprising:
- a drilling rig;
- a drill string attached to the drilling rig and partially disposed within a wellbore;
- a drill bit attached to the drill string and configured to penetrate a subsurface formation to form a wellbore;
- and
- a drilling control system for managing drilling operations and configured to:
- monitor drilling parameters associated with the drill string and the drill bit, wherein the drilling parameters comprise rotary speed (RPM), weight on bit (WOB), and torque (TQ);
- identify a first interval having torsional vibration within the wellbore;
- calculate representative values for the drilling parameters for the first interval;
- determine Torque Swing Ratio values for the drilling parameters for the first interval, wherein the Torque Swing Ratio is one of specific torque swing, normalized specific torque swing, and a combination thereof;
- determine a reference value for the Torque Swing Ratio at full stick-slip for the drill string;
- determine a Stick-Slip Design Factor (SSDF) and a drilling parameter threshold for a second interval, wherein the SSDF is based on the Torque Swing Ratio values and the reference value;
- monitor drilling parameters for the second interval;
- determine Torque Swing Ratio from the drilling parameters for the second interval;
- and
- provide notifications for the second interval based on one of the drilling parameter threshold, the comparison of the Torque Swing Ratio reference value with the determined Torque Swing Ratio values, and any combination thereof.
Dependencies are inferred from the claim text.