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Stimulation Technologies (PRE15)


    This course covers the main aspects of Acid Stimulation Techniques. The course focuses both on theoretical concepts and practical onsite experience.
    Acidizing with Coiled Tubing will be also discussed in detail, due to its importance in acid placement and formation treatments.

    Course Level: Skill
    Duration: 4 days
    Instructor: Antonio Abreu, Luis Remisio, Cipriano Costa

    Designed for you, if you are...

    • A petroleum engineer
    • A production engineer or manager
    • A development geologist
    • A field engineer or manager
    • Oil field technical staff

    How we build your confidence

    • The course will be presented using properly designed slides, some with animation and several videos on relevant issues
    • Teaching methods also include calculations on related issues.
    • Several examples of actual Stimulation Programs will be presented.
    • Daily Recap sessions with questionnaires related to the program of the previous day.

    The benefits from attending

    By the end of the course you will feel confident in your understanding of:

    • Designing a stimulation job
    • Skin damage monitoring
    • Selection of additives
    • Main parameters and KPI’s for a successful stimulation operation
    • Coiled Tubing and Stimulation


    Day 1
    • Introduction to acidizing
    • Acidizing of carbonates and sandstones
    • Acid fracking overview
    • Damage caused by well operations
    • Well candidate selection process (overview)
    • Why there are failures in acidizing?
    • Acid treatment design overview
    • Types of damage
    • Monitoring the acid backflow
    • HCL acid by-products
    • Capturing data, before, during and after the job
    • Acid reactions with OBM (Oil Base Mud)
    • Emulsions

    Day 2
    • Formation damage and other considerations
    • Formation damage mechanisms
    • Matrix acidizing
    • Sandstone versus carbonate acidizing
    • Typical treatment execution
    • Fracture acidizing
    • Proppant fracturing versus fracturing
    • Economic impacts of well stimulation: Acid types / reactions / methods
    • Fluid injectivity on test core
    • Types of acid
    • Acid formulations
    • Organic acids
    • Acid dispersion
    • Viscosified acid
    • Acid emulsions
    • VES acid
    • Acid definition in chemistry
    • Strong acids
    • VES-HCL: gelling and breaking
    • HCL reactions with carbonates
    • HCL / HF acids

    Day 3
    • Acid reactions
    • Rates of reaction
    • Carbonate acidizing
    • Sandstone acidizing
    • Binary acids
    • Dissolving power of acids
    • Molecular weights
    • Treatment evaluation
    • Post-job procedure
    • Pressure response during acid treatment
    • On-site evaluation of treatment effectiveness
    • The Paccaloni technique
    • On job charts for job monitoring
    • Recording of a stimulation job
    • Pressure build-up analysis before and after acidizing

    Day 4
    • No acidification without Coiled Tubing
    • Coiled Tubing conveyance and intervention methods
    • Main components of CT equipment
    • Downhole well tractor
    • CT insertion and removal under pressure
    • High displacement rates in formation with high permeability without limitation in CT friction pressures
    • Wireline and CT intervention methods
    • Fishing with CT
    • Main fishing tools
    • Job design data for fishing operations
    • Well Plug & Abandonment
    • Emergency procedure in case of CT failure



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