Evaluating subsurface properties through monitoring of electric pumps

1 . A method comprising:

generating a tube wave in a tubular of a wellbore with a pump driven by an electrical pump motor by changing a speed of the electrical pump motor;

measuring one or more parameters of the electrical pump motor, wherein the one or more measured parameters of the electrical pump motor are a moment of inertia of a pump drive shaft or a volume of fluid cylinders in the electrical pump motor;

establishing a pump model coupled to a wellbore model, wherein the pump model defines dynamics between a speed of the electrical pump motor and a torque of the electrical pump motor to determine a surface hydraulic boundary condition and wherein the wellbore model defines fluid dynamics within the wellbore based on the surface hydraulic boundary condition; and

generating an output comprising one or more properties of the wellbore and/or fluid in the wellbore using the wellbore model by matching the one or more measured parameters of the electrical pump motor to modeled motor parameters modeled by the pump model using a mismatch function, wherein the one or more properties of the wellbore and/or fluid in the wellbore comprise a wellbore frictional factor, an acoustic velocity of fluid, a fluid density, a fracture impedance, an eroded perforation diameter, or a stimulated reservoir volume.

2 . The method of claim 1 , further comprising controlling the electrical pump motor with an information handling system.

3 . The method of claim 2 , wherein the information handling system comprises a control circuitry that at least in part controls the electrical pump motor.

4 . The method of claim 1 , further comprising adjusting a proppant concentration or a pumping rate based at least in part on the one or more properties of the wellbore.

5 . The method of claim 1 , wherein the pump model is in a frequency domain.

6 . The method of claim 1 , wherein the pump model is in a time domain.

7 . A system comprising:

an electrical pump motor fluidly connected to a tubular in a wellbore; and

an information handling system connected to the electrical pump motor and configured to:

generate a tube wave in the tubular by slowing the electrical pump motor;

measure one or more parameters of the electrical pump motor wherein the one or more measured parameters of the electrical pump motor are a moment of inertia of a pump drive shaft or a volume of fluid cylinders in the electrical pump motor,

establish a pump model coupled to a wellbore model, wherein the pump model defines dynamics between a speed of the electrical pump motor and a torque of the electrical pump motor to determine a surface hydraulic boundary condition and wherein the wellbore model defines fluid dynamics within the wellbore based on the surface hydraulic boundary condition; and

generating an output comprising one or more properties of the wellbore and/or fluid in the wellbore using the wellbore model by matching the one or more measured parameters of the electrical pump motor to modeled motor parameters modeled by the pump model using a mismatch function, wherein the one or more properties of the wellbore and/or fluid in the wellbore comprise a wellbore frictional factor, an acoustic velocity of fluid, a fluid density, a fracture impedance, an eroded perforation diameter, or a stimulated reservoir volume.

8 . The system of claim 7 , wherein the information handling system is further configured to adjust a proppant concentration or a pumping rate based at least in part on the one or more properties of the wellbore.

9 . The system of claim 7 , wherein the pump model is in a frequency domain.

10 . The system of claim 7 , wherein the pump model is in a time domain.

11 . A non-transitory machine-readable medium having data stored therein representing a software executable by a computer, the software executable comprising instructions configured to:

generate a tube wave in a tubular of a wellbore by slowing an electrical pump motor fluidly connected to the tubular;

measure one or more parameters of the electrical pump motor wherein the one or more measured parameters of the electrical pump motor are a moment of inertia of a pump drive shaft or a volume of fluid cylinders in the electrical pump motor;

establish a pump model coupled to a wellbore model, wherein the pump model defines dynamics between a speed of the electrical pump motor and a torque of the electrical pump motor to determine a surface hydraulic boundary condition and wherein the wellbore model defines fluid dynamics within the wellbore based on the surface hydraulic boundary condition; and

generating an output comprising one or more properties of the wellbore and/or fluid in the wellbore using the wellbore model by matching the one or more measured parameters of the electrical pump motor to modeled motor parameters modeled by the pump model using a mismatch function, wherein the one or more properties of the wellbore and/or fluid in the wellbore comprise a wellbore frictional factor, an acoustic velocity of fluid, a fluid density, a fracture impedance, an eroded perforation diameter, or a stimulated reservoir volume.

12 . The non-transitory machine-readable medium of claim 11 , further configured to adjust a proppant concentration or a pumping rate based at least in part on the one or more properties of the wellbore.

13 . The non-transitory machine-readable medium of claim 11 , wherein the pump model defines a dynamic between a speed of the electrical pump motor and a torque of the electrical pump motor.