OIL AND GAS WELL SLOTTING PERFORATION TECHNOLOGY PROFESSIONAL SERVICE

gallery/pump

TECHNICAL FACTORS THE FALL OF PRODUCTION RATE

Let's be clear a few moments concerning wells, fall of inflows and recoveries.

 

Why inflow is fell ? Only when the cause of the fall inflow in the well is determined, is necessary take a decision about real and effective methods of treatment on the basis of financial possibilities and the desired effect.

 

The reason for the fall of inflows must be determine first, and only after that is possible to determine the really effective treatment.

gallery/fon-

TECHNICAL REASONS THE FALL (OR ABSENCE)

OF PRODUCTION RATE

 

  • incorrect grid drilling wells on the deposit-field  (including  inadequate drainage distance between wells) 

  • shielding drainage areas between the reservoirs 

  • absence of product (oil or gas)  

  • natural depletion of productive reservoir

  • fall of internal pressure in the reservoir 

  • improper development wells (including incorrect or inefficient methods of initial opening the productive formation with a small drainage area; use of hydraulic fracturing in the thin-interbedded formations, shale, etc.)

  • absence of hydrodynamic connection (or poor connection) productive formation with the well (including inappropriate methods of initial opening the productive formation, formation of melted borders, for example, after gun or cumulative perforations, or after subsequent plasma-pulse stimulation) 

  • formation of joint and harmful links between productive and non-productive (and water) layers (for example, after fracturing)

  • water flooding of the producing formation (including casing flow, for example, as a result of cement cracks after shock methods of opening the casing) 

  • improper development well (including the wrong chemical treatment) 

  • improper exploitation of the well (including excessively high operating modes)

  • damage of the productive formation (including wrong chemical treatment and some stimulation methods, melted formation, creating reflow border, destructive formation and ultimately ruining the well, etc.)

  • ineffectiveness and short duration of stimulating methods of influence (including small area of the initial opening)

  • colmatation, clogging, contamination of the productive formation in the near wellbore zone (including crumbling (sloughing) sand and specific chemical composition of the formation water)

  • high viscosity, density/gravity (with subsequent waxing), low temperature

  • increased viscosity due low temperature of productive layer

  • content of the productive formation of bridging impurities (including natural and dragged during operation) 

  • contamination of underground pumping equipment, etc.

gallery/ab5