Integrated technology for production by slim borehole drilling,perforation,fracturing,and gas lift:a case study of Permian sandstone reservoir in Kenkiyak Oilfield
The Permian sandstone reservoir in Kenkiyak Oilfield of Kazakhstan belongs to a high pressure and low permeability reservoir,and hydraulic fracturing is the main stimulation measure.At present,more than 10 wells have been shut down due to corrosion and detachment of the pipe string.To achieve high pro-duction,it is necessary to carry out side drilling and fracturing operations.In order to solve the problems of reducing reservoir damage,designing tools in small diameter casing(inner diameter 97.18 mm),non-pressure release jetting and prolonging production period of gas-bearing oil wells,an integrated fracturing string technology of small diameter hydraulic jetting,fracturing and gas lifting was developed,which formed the integrated suitable technology of jetting fracturing and gas lifting for slim borehole sidetracking wells of high-pressure reservoir.The on-site application effect is great,providing new technical ideas for oilfields of long-term shutdown and resumption.
high pressure and low permeability reservoirhydraulic jettingfracturingsidetracking wellslim borehole
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