Apparatus and method for pumping a fluid and an additive from a downhole location into a formation or to another location

1. An apparatus for pumping fluid from a surface location into a formation, comprising:

a pump module configured to be placed in a wellbore, the pump module receiving a fluid from a first source at a surface location and pumping the fluid into the formation, wherein the pump module includes:

a sealed chamber configured to mix therein the fluid received from the first source and an additive received from a second source at the surface location to form a mixed fluid; and

a pump unit housed in the chamber and configured to receive the mixed fluid and pump the mixed fluid from the chamber to a selected location in the formation surrounding the wellbore.

2. The apparatus of claim 1 , wherein the surface location further comprises a location on a sea bed.

3. The apparatus of claim 1 further comprising a first pump at the surface location configured to supply the additive under pressure to the chamber of the pump module.

4. The apparatus of claim 3 further comprising a second pump at the surface location configured to supply the fluid under pressure to the pump module.

5. The apparatus of claim 1 further comprising a controller configured to control one of: supply of the fluid to the chamber; supply of the additive to the chamber; and operation of the pump unit.

6. The apparatus of claim 5 further comprising a sensor for providing information to the controller relating to a parameter of interest relating to the fluid in the pump module.

7. The apparatus of claim 6 , wherein the parameter of interest is one of: pressure, temperature, flow rate, and a characteristic of the formation fluid.

8. The apparatus of claim 6 , wherein the controller controls the operation of the pump unit in response to one of: the parameter of interest and programmed instructions accessible to the controller.

9. The apparatus of claim 1 further comprising a flow control device for controlling one of: flow of the fluid to the container; flow of the additive to the container; and flow of the mixed fluid from the container.

10. The apparatus of claim 1 further comprising an isolation member that seals a section of the wellbore uphole of the pump module and a section of the wellbore downhole of the pump module, and wherein a supply line for supplying the additive to the pump module runs to the pump module from a location outside the wellbore and through the isolation member.

11. A method of pumping a fluid from a surface location to a selected location in a formation, comprising:

providing a pump module in the wellbore proximate the selected location;

supplying a fluid from a first source at the surface location to a sealed chamber of the pump module;

supplying an additive from a second source at the surface location to the sealed chamber; and

allowing the fluid and the additive to mix in the chamber to form a mixed fluid;

receiving the mixed fluid at a pump housed in the sealed chamber; and

pumping the mixed fluid received at the pump from the sealed chamber to the selected location in the formation.

12. The method of claim 11 , wherein the surface location further comprises a sea bed.

13. The method of claim 11 further comprising controlling the supply of the additive to the pump module in response to a parameter of interest.

14. The method of claim 13 , wherein the parameter of interest is selected from a group consisting of: pressure; temperature; flow rate; corrosion; presence of asphaltenes in formation fluid; and presence of water in formation fluid.

15. The apparatus of claim 11 further comprising controlling the supply of one of: the fluid to the pump module; the additive to the pump module; and the supply of the mixed fluid from the pump module.

16. The method of claim 11 further comprising supplying the additive to the pump module using a first pump and supplying the fluid to the container using a second pump.