Perforating for Shales Bogota Julio Lozada Technical Advisor- TCP Ecuador Mayo 2013 SLAP-29
Multi-Stage Multi-Well Completion SLAP-29 2
Estimated 187 Trillion m (Energy Information Administration 2011) SLAP-29
Land Drilling Activity by Type From Spears & Associates, Inc SLAP-29
Horizontal Multi-Stage Perforating Pump Down Services (PDS) offers quick, efficient and cost effective deployment of multi-gun/plug runs for multiple stage completions PDS is a common deployment method used in horizontal…
Horizontal Multi-Stage Perforating- Pump Down Service Most PDS completions are perforated in a geometrical spacing T C P SLAP-29
Perforating Objective Create a conduit between the wellbore and reservoir Choices to be made: Size of gun and charge Type of shaped charge Shot density and phasing Perforation interval SLAP-29
Perforating for Stimulation Interval Stage Length Perforation Spacing Orientation Phasing Charge Selection DP, GH or FRAC SLAP-29
Perforation Phasing Perforation phasing reduces near wellbore tortuosity. (SPE 24823 & 39453) Run in conjunction with FRAC charges, a measurable improvement in stimulation treatments is observed. (SPE 159085) SLAP-29
Perforation Phasing Test From Oriented Perforations A Rock Mechanics View SPE 28555 SLAP-29
What role do perforations play Unless a perforating gun is centralized, the perforation casing hole diameters are a function of gun phasing. This means that the injection rate is different for different perforation diameters.…
Why hole size matters SLAP-29
Studies demonstrate a difference. SLAP-29
Frac Charge Results Charge B Charge Designed for Frac Comparison of 24 different stages: Increased injection rate by 27% SLAP-29 Lowered treating pressures 500-1,000psi
Additional Efficiencies TABLE 4COMPARISON OF STAGE 5, FIELD TRIAL 2. Old Charge New Frac Charge Fewer holes Clusters 6 5 More rate per perforation Holes 57 48 Time to Rate 3 3 Rate 65 60 Pressure 2,212 2,175 ISIP 1,004 1,013…
Offset Well (Identical Completion & Pump Schedule) Comparison of13 different stages: Improved treatment success to 100% - previously experienced early screenouts 30% of time Decreased fluid volume to obtain designed rate…
13 Stage Comparison Comparison of13 different stages: Improved treatment success to 100% - previously experienced early screenouts 30% of time Decreased fluid volume to obtain designed rate SLAP-29
Studies demonstrate a difference. Comparison of 13 different stages: Improved treatment success to 100% - previously Comparison of 24 different stages: experienced early screenouts 30% of time Increased injection rate by 27%…
Studies demonstrate a difference. Comparison of 25 different stages: Lower treating pressures Greater injection rates SLAP-29
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