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At present, hundreds of horizontal wells have been drilled in Hassi Messaoud counting for about one fourth of the field’s<br>output. Among these, several wells are underperforming and could not yield the expected production. Vertical and areal<br>permeability anisotropies, absence of natural fractures, severe heterogeneity, reservoir damage and wellbore instability are<br>the main factors to blame for poor productivity. To address the problem of poor vertical communication and get past the near<br>wellbore damage, hydraulic fracturing has been thought of as the best solution to improve productivity.