To Assess The Effectiveness Of Ultrasonic Treatment

Physically based notion of acoustic stimulation efficiency is the fluid influx increase (well capacity) irrespective of its (liquid) character thus confirming an improvement of filtering characteristics of the wellbore zone and layer and the "releasing" ability of formation. In circumstances where there is a lack of information or total absence of information on the basic characteristics of formation (movement profile, etc.) especially under conditions of high water cut, customers often substitute the notion "efficiency" by the criterion of saleable product (oil, condensate) and inflow increase (productivity).

Therefore economic effect to a wide extent will be determined by completeness and reliability of information on object, just underpinning a well known thesis that one should not economize on information. The most objective criterion of effectiveness of specific well stimulation is the payoff period (at the expense of sales of product additionally produced after acoustic stimulation) which, unfortunately, can be calculated only after completion of stimulation and it is rather difficult to forecast. In real practice (depending on the oil price and other market factors) payoff period may last from several (first) days till several months, with the total duration of productivity increase effect from several months (usually not less than six), till several years (12 or sometimes more) and quite frequently it is accompanied by water cut decrease by several points.