engleski

Multifracturing Well Completions

Hydraulic fracturing has been very well known well stimulation method since many decades back and continues to prove its worthiness enhancing the well productivity if applied properly. But, without a proper technology update on the design management and wellbore tools involved, limited additional improvement is experienced. Over the last 10 years many technical developments and solutions have been made to better stimulate pay zones containing hydrocarbons. New well completion assemblies, to accompany with formation fracturing technology, have to be more reliable, efficient, profound and cost effective in extreme downhole conditions. Many times, with layered complex reservoirs, more than several individual pay zones are required to be stimulated and completed with specifically designed treatments. Multistage fracturing technology is an effective solution for less costly treatment of such complicated reservoirs. This paper demonstrates technological solutions for multizone treatments and its application to different well conditions (temperature, pressure, open hole, cased hole etc.). Multistage fracturing can be done differently, and well completion and treatment design is done with intention to access the reservoir the best possible way. Systems like Wireline operated systems, Coiled tubing applications, Jointed pipe applications and other, are described and introduced.

Hydraulic fracturing; Well stimulation; Well completions; Hydrajetting; Packers; Coiled tubing

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