Problem Well Analysis – Workovers and Interventions

An In-Person Training Course by Esanda.


    In-House sessions are available upon request.

    Course Overview:

    In today’s low oil price climate, more and more operators decide to work on existing producing wells rather than drill expensive new wells. At this course, participants will come away with an understanding of the significant decision areas in well workovers and interventions. Particular emphasis is given to well diagnosis, water control, acidizing, squeeze cementing, wireline techniques, concentric tubing, perforating, well control, and completion fluids.


    Course Objectives:

    • Identify and Select Problem Wells
    • Prepare proposals for workovers/interventions
    • Prepare work AFE and Budget
    • Select proper kill fluids
    • Know about unloading techniques with examples
    • Use logging tools to identify well problems
    • Understand the use and functions of coiled tubing, snubbing unit, and wireline
    • Prepare programs and well diagrams
    • Evaluate and compare mechanical or chemical interventions
    • Decide and prepare for Plug and Abandonment


    The Course Is Designed For:

    • Completion engineers
    • Production engineers
    • Reservoir engineers
    • Drilling engineers
    • Field supervisors
    • Production foremen
    • Engineering technicians


    Your Instructor:

    Vlassis Sarantinos

    Vlassis was born in Cairo Egypt where he studied at the Greek High School, followed by University studies in England to Masters Level in Engineering. His Initial training and career started in the Middle East followed by a return to Greece to become part of a multinational team for the development of the newly discovered Prinos field. Vlassis has recently returned to Cairo to set up a new oil company.

    Vlassis has almost 40 years’ experience in the oil and gas industry with key areas being as follows

    Over 30 years of preparing and implementing Workover, Completion, and Testing programs for single, dual, permanent, retrievable production and injection systems, combined with ESP’s or Gas lift. This experience starts from well killing procedures to final production testing and optimization of well performance. Most work performed offshore, in a high H2S environment.

    Well Servicing – including:
    – All slickline and electric line operations. Perforating and logging
    – Coiled tubing operations with nozzles or motors
    – Deposits removal and inhibition .Asphaltenes-Sulphates
    – Stimulation with various acid systems

    Production Engineering (well monitoring/ well testing)
    – Monitoring daily oil and gas production and analysis data.
    – Prepare procedures for production enhancement
    – Recommend intervention methods
    – Monitoring and analyzing daily water injection and gas lift in 24 wells with the objective to optimize usage of gas and water
    – Testing production wells, Nodal Analysis, Pressure Build up, Pressure Fall-off, Interference tests. Memory gauges and Amerada’s -Drill Stem testing of more than 20 exploration wells

    Management – including:
    – Material and services procurement
    – Budgets and timetables
    – Contracts – Logistics
    – Safety and personnel issues
    – Supervision on site
    – Leader of company workforce plus contractors and service companies


    Course Outline:

    • Problem Well Analysis
    • Decision Making
    • Cost Analysis, Budgeting, and Reporting
    • Perforating – Reperforating
    • Stimulation Diversion techniques
    • Squeeze Cementin
    • Completion & Workover Fluids
    • Blowout Prevention Barriers
    • Rig Systems, including Wireline and Coiled Tubing
    • Well Reservoir Concepts affecting well production

    Course Curriculum

    Problem Well Analysis – Workovers and Interventions 1 day, 11 hours

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    Esanda is an independent upstream oil and gas consultancy specialising in industry specific training and field development planning services. Our operations are supported by our UK and Australia offices. Our training providers are practicing industry specialists who develop our in house courses and work with clients to build bespoke training for their staff.We pride ourselves on being able to bring hundreds of man years of experience to the training sector and the positive feedback we receive from our satisfied clients.
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