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E-456 - Matrix Acidizing

5 days PRO/ACIDIFE
Level
Proficiency
Audience
  • Drilling or completion engineers, supervisors, lab or production professionals, non-specialists in wellbore treatment.
Purpose
  • This course provides knowledge and skills needed to identify well damage issues in sandstone and carbonate reservoirs, and design acidizing programs.
Learning Objectives
  • Upon completion of the course, participants will be able to:
  • identify the nature and the origins of well damage,
  • design an acidizing program,
  • select the additives needed,
  • set up the acid treatment program.
Prerequisite
  • No prerequisites for this course.
Ways and means
  • Exercises - Teamwork.
  • Visit of a reservoir-wellbore interface laboratory.
Observation
Kindly refer to the following complementary course which might be of interest: “Welbore Treatments” (E-455).

INTRODUCTION TO RESERVOIR TREATMENTS 0.5 day
  • Fundamental reminders on the productivity index (PI), the skin effect and flow efficiency, the different components of the skin.
FORMATION DAMAGE 1 day
  • Productivity issues: cause of low productivity, nature and origins of the damage, location of the problems and possible solutions.
  • Scale deposition: scale control and prevention.
MATRIX TREATMENT: ACIDIZING CARBONATES 1 day
  • Aims; how it works.
  • Sandstones: inner characteristics, reactivity to injected fluids.
  • Laboratory studies.
  • Exercises.
MATRIX TREATMENT: ACIDIZING SANDSTONES 1 day
  • Aims; how it works.
  • Sandstones: inner characteristics, reactivity to injected fluids.
  • Choosing the acids.
ACIDIZING ADDITIVES 0.5 day
  • Review of the different additives (corrosion inhibitor, iron complexing agents, surfactants, solvents, etc.).
  • Selection of the additives.
MATRIX TREATMENT DESIGN 0.5 day
  • Candidate selection.
  • Matrix design methodology.
  • Diversion.
  • Treatment evaluation.
SUMMARY NOTE 0.5 day
  • Other associated processes (water shut-off, …).
  • Causes of failure in matrix acidizing.
  • Case study.