Method and system for prioritizing and allocating well operating tasks

• US 10,062,044 B2
• Filed: 04/08/2015
• Issued: 08/28/2018
• Est. Priority Date: 04/12/2014
• Status: Active Grant

• Current Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Original Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Inventors: Hildebrand, Ginger, Coffman, Chunling Gu
• Primary Examiner(s): Rotaru, Octavian
• Application Number:
  US14/682,056
• Publication Number:
  US 20150294258A1
• Time in Patent Office: 1,238 Days
• Field of Search: None
• CPC Class Codes: E21B 21/08 Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure valve arrangements therefor E21B21/10
• CPC Class Codes: E21B 44/00 Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
• CPC Class Codes: E21B 45/00 Measuring the drilling time or rate of penetration
• CPC Class Codes: E21B 7/04 Directional drilling
• CPC Class Codes: E21B 7/10 Correction of deflected boreholes
• CPC Class Codes: G06Q 10/063114 Status monitoring or status determination for a person or group
• CPC Class Codes: G06Q 10/06312 Adjustment or analysis of established resource schedule, e.g. resource or task levelling, or dynamic rescheduling

Abstract

A method for managing well construction operations includes accepting as input to a computer a list of tasks required to complete construction of at least one wellbore, the list of tasks having at least an initial chronological order. Measurements of at least one parameter related to at least one task on the list of tasks is entered into the computer. The list of tasks is prioritized by at least one of changing a chronological order of performance or a length of time to complete at least one of the tasks based on measurements of the at least one parameter. The prioritizing is performed to optimize at least one well construction performance parameter. The prioritized list is displayed to at least one user of the computer.

Claims

1. A method for correcting directional drilling of a wellbore, comprising:

determining, via equipment at a well, a correction to the directional drilling of the wellbore to be performed ahead of a change in drilling fluid flow rate;

applying, by a drilling motor, a torque to a drill pipe to begin the directional drilling;

measuring, by sensors of the equipment, a spatial position of the wellbore at a well segment depth, a pressure of drilling fluid at the wellbore, influx of formation fluid at the wellbore, loss of the drilling fluid at the wellbore, a fracture gradient and pore pressures of subsurface reservoir formations, the drilling fluid flow rate, overpull, and the torque of the drill pipe;

steering, by the equipment, the directional drilling to reduce a difference between the measured spatial position of the wellbore at the well segment depth and a planned position;

determining, by the sensors, that the measured overpull and torque exceed physical limitation thresholds of at least a portion of the equipment, and that an equivalent circulating density (ECD) of the drilling fluid is approaching one of the pore pressures or the fracture gradient of the subsurface reservoir formations and indicative of formation fluid entry into the well or the drilling fluid being lost into one or more of the subsurface reservoir formations;

rescheduling, via the equipment, the change in the drilling fluid flow rate ahead of the directional drilling correction and adjusting an allotted time of the drilling fluid flow rate change; and

subsequent to the rescheduling of the drilling fluid flow rate change, determining, by the equipment, that a reduction in the drilling fluid flow rate adversely reduces the ECD below one of the pore pressures of the subsurface reservoir formations, and consequently, as the ECD approaches the fracture gradient of the formations, reducing, by the equipment, the pressure of the drilling fluid by a selected fraction.

2. The method of claim 1 wherein the drilling fluid comprises mud.

3. The method of claim 1 wherein the equipment comprises a logging-while-drilling (LWD) tool.

4. The method of claim 1 wherein the equipment comprises a measurement-while-drilling (MWD) tool.

5. The method of claim 1 wherein the drill pipe is part of a drill string that comprises a drill bit.

6. The method of claim 1 wherein the equipment comprises at least one processor.

7. The method of claim 1 wherein rescheduling comprises adjusting a well plan.

8. The method of claim 1 comprising generating an active task map that comprises at least one drilling-related task.

9. The method of claim 1 wherein the equipment comprises a drilling rig.

10. A system for correcting directional drilling of a wellbore, the system comprising:

a drilling motor configured to;

apply, a torque to a drill pipe to begin the directional drilling;

sensors configured to;

measure, a spatial position of the wellbore at a well segment depth, a pressure of drilling fluid at the wellbore, influx of formation fluid at the wellbore, loss of drilling fluid at the wellbore, a fracture gradient and pore pressures of subsurface reservoir formations, drilling fluid flow rate, overpull, and the torque of the drill pipe, and

determine, that the measured, overpull and torque exceed physical limitation thresholds of at least a portion of equipment at a well, and that an equivalent circulation density (ECD) of the drilling fluid is approaching the fracture gradient or the pore pressure of the subsurface reservoir formations and, correspondingly, that the drilling fluid is being lost into the subsurface formations or that formation fluid has entered the well;

the equipment configured to;

determine, a correction to the directional drilling of the wellbore to be performed ahead of a change in the drilling fluid flow rate,

steer, the directional drilling to reduce a difference between the measured spatial position of the wellbore at the well segment depth and a planned position,

reschedule, the change in the drilling fluid flow rate ahead of the directional drilling correction and adjust an allotted time of the drilling fluid flow rate change, and

subsequent to the reschedule of the drilling fluid flow rate change, determine, by the equipment, that a reduction in the drilling fluid flow rate adversely reduces the ECD below one of the pore pressures of the subsurface reservoir formations, and consequently, as the ECD approaches the fracture gradient of the formations, reduce, by the equipment, the pressure of the drilling fluid by a selected fraction.

11. The system of claim 10 wherein the drilling fluid comprises mud.

12. The system of claim 10 comprising a logging-while-drilling (LWD) tool.

13. The system of claim 10 comprising a measurement-while-drilling (MWD) tool.

14. The system of claim 10 wherein the drill pipe is part of a drill string that comprises a drill bit.

15. The system of claim 10 wherein the equipment comprises at least one processor.

16. The system of claim 10 wherein the equipment is configured to adjust a well plan.

17. The system of claim 10 wherein the equipment is configured to generate an active task map that comprises at least one drilling-related task.

18. The system of claim 10 comprising a drilling rig.