Permian Basin Oil Recovery Conference, 7–8 May, Midland, Texas


The factors which affect the treatment cost of an oil or gas well are numerous. These factors, hydraulic hp, treating fluid, well equipment, etc., may be determined and controlled prior to the treatment. An engineering design of a treatment can reduce costs by properly using hydraulic hp, but unless the treatment is engineered properly too much or too little hp may be used.

Better wells will result if each productive zone is treated. Until recently, the treatment of each zone required expensive bridge plugs, packers or other special well equipment. Ball sealer treatments can be designed which will effectively stimulate each zone and reduce completion costs.


There are many factors which must be considered when acidizing or fracturing an oil or gas well - what well conditions are optimum, which treating fluids should be used, what rate of injection is best, how much hydraulic hp should be used, etc. If these factors are not considered and controlled as accurately as possible, a poor well may result and completion costs may be higher than necessary.

The demand for increasing injection rates on oil and gas well treatments has necessitated the use of greater quantities of hydraulic hp. The utilization of increased hydraulic hp is usually accompanied by increased treatment costs. These increased treatment costs have resulted in a desire for more efficient treatment design — an optimum treatment with minimum hydraulic hp. A study was made to determine how unnecessary hp losses could be determined and eliminated. As a direct result of this investigation, well treatments are being engineered to produce maximum results for the lowest possible cost. It is the purpose of this paper to present the methods for engineering the hydraulic hp requirements for any given treatment.

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