OIL AND GAS WELL SLOTTING PERFORATION TECHNOLOGY PROFESSIONAL SERVICE

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PHYSICAL FACTORS DETERMINING THE QUANTITY OF INFLOW

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  • deposit 

  • reservoir rock quality

  • porosity

  • permeability 

  • pore size

  • water present

  • reservoir temperature

  • viscosity 

  • density/gravity

  • thickness of the productive formation 

  • depth of occurrence

  • location (relative to other wells, distance to the injection well, by depth of productive and aquifers layers) 

  • internal reservoir pressure 

  • method of extraction (vertical/horizontal)

  • productive formation’s perforations/open hole (opened productive formation’s area)

  • casing’s perforations (opened casing’s area)

  • connectivity (hydrodynamic connection the well with producing formation)

  • cement condition (cracks, dents, chips)

  • ID casing/open hole and condition 

  • ID tubing and condition 

  • drawdown pressure difference

  • choke size/setting 

  • underground pumping equipment’s condition

  • surface equipment’s condition  

 

Which from the above factors is possible to change/improve, if the influx has already fallen ?

Of course, location, deposit (remaining reserve), rock/formation composition, pore size, porosity/permeability, depth of occurrence, thickness of the productive formation, design (vertical/horizontal) and casing in the existing wellbore no longer change.

 

Only if drill a new well in another place.

 

Some service-companies argues, that new drilling of vertical well can cost as low as 20-25 thousand dollars. But do not forget about casing’s installation, cementation, logging, geological analysis, casing opening, opening of productive layers, subsequent development of the well, etc.

 

This process is several times more expensive than drilling, and no guarantee that you will get inflow.

 

So the drilling of a new well, we will not be considered.

 

What proposes service and operating companies under so-called recovery/recompletion for increase the flow?

 

Alas, the selection is small: additional drilling, additional gun/cumulative/abrasive jet (point) perforation, additional chemical or some stimulation treatment, additional hydraulic fracturing, and pump-jack parts replacement.

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