Produced Water Reinjection Performance Joint Industry Project

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Produced Water Reinjection PerformanceJoint
Industry Project

• TerraTek, Inc.
• Triangle Engineering
• Taurus Reservoir Solutions (DES)
• E-first Technologies
• Advantek
• VIPS

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Task 3 Soft Formations

• Review of progress since June meeting in Edinburgh

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Task 3 Soft Formations

• 3.1 Acquisition of Information
• 3.2 Empirical Correlations and Data Evaluation
• 3.3 Physical Mechanisms/Phenomena
• 3.4 Evaluation of Currently Existing Models
• 3.5 Best Practices
• Well Design, Completion and Operating Options
• Water Quality Specifications/Implications/Guidelin
  es

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New Work Completed

• Data additions for soft formations
• General methodology of analyzing the data set up
• Analysis of 3 data sets
• Review of modeling tools completed posted
• Spreadsheet analysis of the performance in terms
  of perm damage or skin applied to analyzed data
  sets
• Tool for calculating poro- and thermoelastic
  stresses
• Detailed look at II calculation

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New Work in progress

• Analysis of 2 additional data sets (Kerr-McGee,
  Phillips)
• Simple method of representing damage in matrix
  injection developed (applied to Elf and Shell
  data)
• Review of injectivity of completions needs
  finishing
• Investigation of completion skin of perforated
  completions
• New explanation of apparent injectivity loss in
  fracture injection

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Specific Presentations

• Analysis and comparison of 3 data sets for soft
  formations
• Methodology for computing correct injectivity
  index in fractured injection mode
• Injectivity losses in perforated completions in
  soft sands

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Review of Modeling Tools (general)

• Commercial/other software listed and summarized
• Requirements for soft sands PWRI have been
  defined
• Findings summarized in a table

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Injectivity of Completion Configurations

• Summarizes calculation procedures available
• Covers most completions included in completion
  selection tool
• Some less known aspects included (turbulence in
  gravel packed perf completions,)
• The results of the data analysis highlights the
  importance of evaluating the factors the effect
  is cumulative!

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Example Effect of turbulence (old work)
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Example Effect of gravel packing or perf fill-up
(Pucknell and Mason)
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Example Effect of turbulence in the fracture
(frac pack completions, vert well)
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Next Deliverables

• Complete trend analysis of additional data sets
  (Kerr-McGee, Phillips, BP, Norsk Hydro)
• Understanding different signatures of the data in
  fracture injection when the WHP is operator
  limited
• Provide a toolkit for estimating skin in
  perforated completions with perf collapse or
  fill-up, and turbulent effects
• Demonstration of the effect of different modes of
  reservoir deformation on the process via modeling
  (worked as part of Task 6)