Fracturing system and control system and method for the fracturing system

Patent metadata

Field	Value
Publication number	US-12497880-B2
Application number	US-202418745699-A
Country	US
Kind code	B2
Filing date	Jun 17, 2024
Priority date	Apr 2, 2021
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

A control system includes: a fracturing control device configured to acquire a target fracturing pressure of a fracturing unit, perform loop control on the fracturing unit by taking the target fracturing pressure as a control target, and set a target sand blending pressure for the sand blending unit; a sand blending control device configured to perform loop control on the sand blending unit by taking the target sand blending pressure as a control target.

First claim

What is claimed is:

1 . A method for controlling a fracturing system in wellsite operation, the fracturing system comprising a fracturing unit for fracturing hydrocarbon reservoirs and a sand blending unit for blending fracturing fluid and proppants and supplying blended mixture to the fracturing unit, the method comprising:
maintaining a target fracturing pressure at the fracturing unit by using as feedback a fracturing pressure deviation between the target fracturing pressure and a current fracturing pressure of the fracturing unit; obtaining a target sand blending pressure by adding the target fracturing pressure and the fracturing pressure deviation; and maintaining the target sand blending pressure at the sand blending unit by using as feedback a sand blending pressure deviation between the target sand blending pressure and a current sand blending pressure of the sand blending unit.

2 . The method of claim 1 , further comprising:
obtaining a target mixing discharge amount by adding a target sand blending input amount and a sand blending input amount increment; and maintaining the target mixing discharge amount at a mixing unit by using as feedback a mixing amount deviation between the target mixing discharge amount and a current mixing discharge amount.

3 . The method of claim 2 , further comprising:
acquiring the target blending input amount according to the target mixing discharge amount; acquiring a mixing amount deviation between the target mixing discharge amount and a current mixing discharge amount of the mixing unit; acquiring a mixing input amount increment of the mixing unit based on the mixing amount deviation; obtaining a sum of the target mixing input amount and the mixing input amount increment, and setting the sum as a raw material supply amount.

4 . The method of claim 2 , further comprising:
acquiring a sand blending input amount increment based on the sand blending pressure deviation in a dynamic look-up table.

5 . The method of claim 4 , further comprising:
monitoring an actual output amount of the fracturing unit, the sand blending unit, and the mixing unit to determine whether an error is present.

6 . The method of claim 5 , further comprising:
distributing fracturing fluid to fracturing mechanisms of the fracturing unit according to the target fracturing pressure.

7 . The method of claim 6 , further comprising:
fill water into a water tank when a liquid level of the water tank is lower than a preset minimum liquid level.

8 . The method of claim 1 , further comprising:
acquiring the target fracturing pressure from a static look-up table.

9 . The method of claim 1 , further comprising:
acquiring the target fracturing pressure from a wellhead pressure, a manual input, process requirements, or software calculation.

10 . A method for controlling a fracturing system in wellsite operation, the fracturing system comprising a fracturing unit for fracturing hydrocarbon reservoirs and a sand blending unit for blending fracturing fluid and proppants and supplying blended mixture to the fracturing unit, the method comprising:
acquiring a target fracturing pressure of the fracturing unit; performing first loop control on the fracturing unit with the target fracturing pressure as a first control target; setting a target sand blending pressure for the sand blending unit according to the target fracturing pressure and a fracturing pressure deviation between the target fracturing pressure and a current fracturing pressure of the fracturing unit; and performing second loop control on a sand blending unit with the target sand blending pressure as a second control target.

11 . The method of claim 10 , further comprising:
adjusting a rotational speed of a packing auger that receives sand proppants.

12 . The method of claim 10 , further comprising:
setting a target mixing discharge amount for a mixing unit; performing third loop control on the mixing unit; and setting a raw material supply amount for the fracturing system with the target mixing discharge amount as a third control target.

13 . The method of claim 12 , further comprising:
acquiring the fracturing pressure deviation between the target fracturing pressure and the current fracturing pressure of the fracturing unit; acquiring a fracturing pressure increment of the fracturing unit based on the fracturing pressure deviation; obtaining a first sum of the target fracturing pressure and the fracturing pressure increment; setting the first sum as the target sand blending pressure for the sand blending unit; acquiring a target sand blending input amount of the sand blending unit according to the target sand blending pressure; acquiring a sand blending pressure deviation between the target sand blending pressure and a current sand blending pressure of the sand blending unit; acquiring a sand blending input amount increment of the sand blending unit based on the sand blending pressure deviation; obtaining a second sum of the target sand blending input amount and the sand blending input amount increment; setting the second sum as a target mixing discharge amount for the mixing unit; and acquiring a target blending input amount of the mixing unit according to the target mixing discharge amount; acquiring a mixing amount deviation between the target mixing discharge amount and a current mixing discharge amount of the mixing unit; acquiring a mixing input amount increment of the mixing unit based on the mixing amount deviation; obtaining a third sum of the target mixing input amount and the mixing input amount increment, and setting the third sum as the raw material supply amount for the fracturing system.

14 . The method of claim 13 , further comprising:
acquiring the target fracturing pressure, the target sand blending input amount, and the target mixing input amount from static look-up tables.

15 . The method of claim 14 , wherein acquiring the fracturing pressure increment comprises
acquiring the fracturing pressure increment from a first dynamic look-up table at an operating condition point of the target fracturing pressure based on the fracturing pressure deviation; wherein acquiring the sand blending input amount increment comprises acquiring the sand blending input amount increment from a second dynamic look-up table at an operating condition point of the target sand blending input amount based on the sand blending pressure deviation; and wherein acquiring the mixing input amount increment comprises acquiring the mixing input amount increment from a third dynamic look-up table at an operating condition point of the target mixing input amount based on the mixing amount deviation.

16 . The method according to claim 15 , further comprising:
monitoring an actual output amount of the fracturing unit, the sand blending unit, and/or the mixing unit to identify whether an error occurs.

17 . The method of claim 16 , further comprising:
distributing fracturing fluid to various fracturing mechanisms of the fracturing unit according to the target fracturing pressure.

18 . The method of claim 17 , further comprising:
controlling a clear water tank of the fracturing system to feed water when a liquid level of the clear water tank is lower than a preset minimum liquid level.

19 . The method of claim 12 , further comprising:
transmitting an output flow signal of the mixing unit to a mixing control device.

20 . The method of claim 10 , further comprising:

Assignees

• Yantai Jereh Petroleum Equipment & Technologies Co Ltd

Inventors

• Liu Kaishen
• Li Xiance
• Cui Shuzhen
• Mao Zhuqing
• Liu Weiwei
• Li Liang
• Zhang Pengyuan
• Zhao Dawei

Classifications

• E21B43/2607

  Surface equipment specially adapted for fracturing operations · CPC title

• E21B43/267 Primary

  reinforcing fractures by propping · CPC title

• E21B43/26 Primary

  by forming crevices or fractures · CPC title