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Wellbore Treatments

COMP/TRAITE
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Who should attend?

  • This course provides knowledge and skills needed to examine well damage issues and take appropriate actions.
Audience :
  • Drilling or completion engineers, supervisors, lab or production professionals, non-specialists in wellbore treatment.

Level : Foundation

Course Content

  • INTRODUCTION TO WELLBORE TREATMENTS

      • Fundamental reminders on Productivity Index (PI), the skin effect and flow efficiency, the different components of the skin.
      • Productivity issues: cause of low productivity, nature and origins of well damage, location of problems and possible solutions.
      • Damage due to fluids: mechanisms, prevention.

  • MATRIX TREATMENT: ACIDIZING…

      • Aims; how it works.
      • Carbonate rocks and sandstones; inner characteristics, reactivity to injected fluids.
      • Choosing the acids and the additives.
      • Choosing the wells to be treated.
      • Design: preparation, checks and guidelines during the operation, after the acidizing (flow back…), possible cause of failure, coiled tubing…

  • HYDRAULIC FRACTURING

      • Aims and principles; candidate wells.
      • Frac fluids and fracture propping.
      • Calculation models and frac impact on PI.
      • Design; program, frac evaluation.
      • Other cases: pre-frac, minifrac, acid frac.

  • SAND CONTROL

      • Basics: consequences of sand, prediction of sand, sand analysis.
      • Sand control techniques; case of mechanical processes (determining the gravel and the screens…).
      • Design: cased hole gravel packing, openhole gravel packing, preparing the gravel pack, various methods, guidelines.

  • WATER OR GAS SHUT-OFF & DEPOSITS

      • Origin of the problems.
      • Remedial.
      • Debate around several examples.
      • Case study.

  • KNOWLEDGE ASSESSMENT

Learning Objectives

  • Upon completion of the course, participants will be able to:
  • identify the nature and the origins of well damage,
  • choose the adequate stimulation method,
  • learn how to deal with sand production and water coning.

Ways & Means

  • Animations - Exercises.
  • Visit of a rock mechanics and reservoir-wellbore interface laboratory.
  • Application to a real case (project) for the participants in the “Drilling & Completion Engineering” training course (page 154).