SLAP 29 Perforating for Shales

7/24/2019 SLAP 29 Perforating for Shales

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Bogota

Julio LozadaTechnical Advisor- TCP Ecuador

Mayo 2013


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Multi-Stage Multi-Well Completion

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Estimated 187 Trillion m (Energy Information Administration 2011)

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Land Drilling Activity by Type

SLAP-29From Spears & Associates, Inc


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Horizontal Multi-Stage Perforating

Pump Down Services (PDS) offers quick, efficient andcost effective deployment of multi-gun/plug runs formultiple stage completions

PDS is a common deployment method used in horizontalunconventional wells primarily for guns and plugs but

-

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, ,

Efficient PDS now allow up to 5 stages per 24 hour day

A typical single E-Line stage consists of

Multiple guns (3 foot - 6 spf carriers) ((SelectivePerforating))

Explosive setting tool

Composite plug

5


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Most PDS completions are perforated in ageometrical spacing

Horizontal Multi-Stage Perforating- Pump Down Service

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TC

P


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Perforating Objective

Create a conduit between thewellbore and reservoir

Choices to be made:

Size of gun and charge

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ype o s ape c arge Shot density and phasing

Perforation interval


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Perforating for Stimulation

Interval

Stage Length Perforation Spacing

Orientation

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Phasing Charge Selection

DP, GH or FRAC


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Perforation Phasing

Perforation phasingreduces near wellbore

tortuosity. (SPE 24823 &39453)

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FRAC charges, ameasurableimprovement in

stimulation treatments isobserved. (SPE 159085)


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Perforation Phasing Test

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From Oriented Perforations A Rock Mechanics View SPE 28555


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What role do perforations play?

Unless a perforating gun iscentralized, the perforationcasing hole diameters are a

function of gun phasing. Thismeans that the injection rate

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perforation diameters. SPE 39453

Frac Charge


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Why hole size matters

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Studiesdemonstrate adifference.

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Frac Charge Results

Charge B Charge Designed for Frac

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Comparison of 24 different stages: Increased injection rate by 27% Lowered treating pressures 500-1,000psi


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TABLE 4COMPARISON OF STAGE #5, FIELD TRIAL 2.

Old Charge New Frac Charge

Clusters 6 5

Holes 57 48

Time to Rate 3 3

Rate 65 60

Pressure 2,212 2,175

ISIP 1,004 1,013


Old Charge New Frac Charge

Additional Efficiencies

Fewer holes More rate per perforation

Faster time to rate

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Holes58 52Time to Rate 4 2

Rate 65 65


ISIP 719 745


Old Charge New Frac ChargeClusters 5 6

Holes 52 52

Time to Rate 5 3

Rate 60 65


ISIP 507 611

More rate

Faster time to rate


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Offset Well (Identical Completion & Pump Schedule)

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Comparison of13 different stages: Improved treatment success to 100% - previously

experienced early screenouts 30% of time Decreased fluid volume to obtain designed rate


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13 Stage ComparisonComparison of13 different stages:

Improved treatment success to 100% - previouslyexperienced early screenouts 30% of time

Decreased fluid volume to obtain designed rate

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Comparison of 13 different stages: Improved treatment success to 100% - previously

experienced early screenouts 30% of time

Decreased fluid volume to obtain designed rate

Comparison of 24 different stages:

Increased injection rate by 27% Lowered treating pressures 500-1,000psi


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Comparison of 25 different stages: Lower treating pressures Greater injection rates


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THANK YOU

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SLAP 29 Perforating for Shales

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