How to calculate Well Bore pressure drop?

[DAH7542]

Dear ibtisam01,

The wellbore pressure drop inside the horizontal well section is a concept related only with the frictional and fluid acceleration pressure drop inside the well, I mean it is not a reservoir-related issue but a wellbore-issue. It depends on the Length of horizontal lateral (liner), Friction Factor, fluid density, flow rate, internal diameter, relative pipe roughness and some other wellbore parameters.

In summary, the reservoir simulators such as E100 cannot solve for this by its own, this information must be provided as an input to the simulator in table formats. These tables of wellbre pressure drop vs depth (horizontal well section) can be built in a simple excel file by using any available model for it (SPE papers I recommended) or by using any commercial software for those purposes (Wellflo or any other).

My answer to your previous question: If in your run you didn't specified the wellbore pressure drop along the horizontal length by means of, for instance the Wellbore Friction Option in ECLIPSE, neither strategy (1 or 2) will give you the pressure drop along the well bore length.

[ibtisam01]

Dear DAH7542,

I have applied well bore Friction option in eclipse and it is running.

I have used Keyword 'Friction' in RUNSPEC section and 'WFRICTION' in schedule section. but I dont understand where to bring values of the following:

1. Friction Factor (I dont know from where I can get this)
2. Fluid density, (Surface Oil, water and gas densities are defined in the keyword DENSITY in PROPS)
3. Flow rate (It is defined as a control mode LRAT IN item 3 of WCONPROD)
4. Internal diameter, (I think it is defined in WELSPECS item 9)
5. Relative pipe roughness (I think it is defined in Record 1 of WFRICTION ITEM 3)

And also is this the correct formula to calculate pressure drop along the horizontal well length?

Pressure drop = 2*f*(L/D)*density*Velocity(Square) ?

Kindly do favor for me and let me know how to easily solve pressure drop along the horizontal section.

Bundle of thanks

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Dear ibtisam01,

The wellbore pressure drop inside the horizontal well section is a concept related only with the frictional and fluid acceleration pressure drop inside the well, I mean it is not a reservoir-related issue but a wellbore-issue. It depends on the Length of horizontal lateral (liner), Friction Factor, fluid density, flow rate, internal diameter, relative pipe roughness and some other wellbore parameters.

In summary, the reservoir simulators such as E100 cannot solve for this by its own, this information must be provided as an input to the simulator in table formats. These tables of wellbre pressure drop vs depth (horizontal well section) can be built in a simple excel file by using any available model for it (SPE papers I recommended) or by using any commercial software for those purposes (Wellflo or any other).

My answer to your previous question: If in your run you didn't specified the wellbore pressure drop along the horizontal length by means of, for instance the Wellbore Friction Option in ECLIPSE, neither strategy (1 or 2) will give you the pressure drop along the well bore length.