Automatic real time screen-out mitigation

1. A method of mitigating wellbore screen-out for a wellbore, the method comprising:

automatically determining an onset of wellbore screen-out when a time it takes for an upward trend of corrected pressure data of hydraulic fluid from a hydraulic fracturing well site to reach a maximum allowable pressure of the hydraulic fluid, relative to a time required to move one wellbore volume of the hydraulic fluid at a present slurry rate, is less than a value based on a current condition of a fracturing operation;

selecting at least one type of mitigation action based on the automatic determination of the onset of the wellbore screen-out; and

mitigating the wellbore screen-out with the selected at least one type of mitigation action.

2. The method of claim 1 , wherein the at least one type of mitigation action is selected from the group consisting of:

proppant concentration adjustments;

fluid rheology adjustments by changing a concentration of friction reducer or other chemicals; and

slurry pumping rate adjustments.

3. The method of claim 2 , wherein the selection of the at least one type of mitigation action is based on a pressure safety window and a risk from the automatic determination of the onset of the wellbore screen-out.

4. The method of claim 3 , wherein the pressure safety window is a difference between a pressure of fracturing fluid measured at a surface of the wellbore and a maximum pressure of the fracturing fluid for the hydraulic fracturing well site.

5. The method of claim 3 , wherein the risk is a rate of increase in pressure of fracturing fluid.

6. The method of claim 1 , wherein the at least one type of mitigation action is performed automatically.

7. The method of claim 1 , wherein the at least one type of mitigation action is performed by a user.

8. A system for mitigating wellbore screen-out for a wellbore, the system comprising:

at least one surface pressure sensor; and

at least one processor configured to perform operations including:

automatically determining an onset of wellbore screen-out when a time it takes for an upward trend of corrected pressure data of hydraulic fluid from the at least one pressure sensor from a hydraulic fracturing well site to reach a maximum allowable pressure of the hydraulic fluid, relative to a time required to move one wellbore volume of the hydraulic fluid at a present slurry rate, is less than a value based on a current condition of a fracturing operation;

selecting at least one type of mitigation action based on the automatic determination of the onset of the wellbore screen-out; and

mitigating the wellbore screen-out with the selected at least one type of mitigation action.

9. The system of claim 8 , wherein the at least one type of mitigation action is selected from the group consisting of:

proppant concentration adjustments;

fluid rheology adjustments by changing a concentration of friction reducer or other chemicals; and

slurry pumping rate adjustments.

10. The system of claim 9 , wherein the selection of the at least one type of mitigation action is based on a pressure safety window and a risk from the automatic determination of the onset of the wellbore screen-out.

11. The system of claim 10 , wherein the pressure safety window is a difference between a pressure of fracturing fluid measured at a surface of the wellbore with the at least one pressure sensor and a maximum pressure of the fracturing fluid for the hydraulic fracturing wellsite.

12. The system of claim 10 , wherein the risk is a rate of increase in pressure of fracturing fluid.

13. The system of claim 8 , wherein the at least one type of mitigation action is performed automatically.

14. The system of claim 8 , wherein the at least one type of mitigation action is performed by a user.

15. A computer program product having a series of operating instructions stored on a non-transitory computer-readable medium that cause at least one processor to perform operations to mitigate wellbore screen-out for a wellbore, the operations comprising:

automatically determining an onset of wellbore screen-out when a time it takes for an upward trend of corrected pressure data of hydraulic fluid from a hydraulic fracturing well site to reach a maximum allowable pressure of the hydraulic fluid, relative to a time required to move one wellbore volume of the hydraulic fluid at a present slurry rate, is less than a value based on a current condition of a fracturing operation;

selecting at least one type of mitigation action based on the automatic determination of the onset of the wellbore screen-out; and

mitigating the wellbore screen-out with the at least one type of mitigation action.

16. The computer program product of claim 15 , wherein the at least one type of mitigation action is selected from the group consisting of:

proppant concentration adjustments;

fluid rheology adjustments by changing a concentration of friction reducer or other chemicals; and

slurry pumping rate adjustments.

17. The computer program product of claim 16 , wherein the selection of the at least one type of mitigation action is based on a pressure safety window and a risk from the automatic determination of the onset of the wellbore screen-out.

18. The computer program product of claim 17 , wherein the pressure safety window is a difference between a pressure of fracturing fluid measured at a surface of the wellbore with at least one pressure sensor and a maximum pressure of the fracturing fluid for the hydraulic fracturing well site.

19. The computer program product of claim 17 , wherein the risk is a rate of increase in pressure of fracturing fluid.

20. The computer program product of claim 15 , wherein the at least one type of mitigation action is performed automatically.