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Re-Fracturing: Essential Understanding And Successful Application In Vertical And Multistage Horizontal Wells


March 24 - 28, 2019

Instructor : Tim Leshchyshyn, P.Eng.


Completion engineers, geologists, technologists and field operations personnel, Managers and supervisors who want to learn or advance their knowledge of Hydraulic Re-fracturing.


With the drop in oil prices, a large amount of capital spent on the maintaining of production and cash flow from drilling new wells is being diverted to lower cost recompletions, particularly refracturing. It only costs 15 to 25% of the original completions costs for refracturing but initial production can often be achieved again however with varying results in new production declines. Examples covered in the course will illustrate the incremental F&D (Find and Development Cost) of $13.37/bbl results in a range of 200-300% ROI (Return on Investment) and returning $2.5 from every $1 invested.

This course will focus on multistage fractured horizontal wells in addition to the current opportunity and rich history of vertical well refracturing in the last 40 years. This will simplify the leap to horizontals concepts and unique multistage horizontal challenges. Background and statistics of our industry will be shown for past activity that is scarcely known, and the refrac well identification well inventory will be revealed for future opportunity. A scoring method for refrac candidate well by well evaluation will be reviewed. The technology for how the original frac stage to stage isolation, plus how the wellbore was left will be reviewed. The challenges for the refrac stage to stage isolation will be examined as it greatly impacts the opportunity, well identification, candidate evaluation and overall strategy. Frac optimization and refrac design parameters will be examined to understand how they differ from the initial primary well's production. Case studies of where refracturing or re-stimulation has worked will also be reviewed.


  • Introduction to refracturing
  • Methods for Economic Evaluation
  • Primary Completions that Lead to Refracs
  • Reasons for Refracturing
  • Refrac Candidate Identification
  • How Big is the Refrac Market
  • Frac Design and Modeling Considerations
  • Evaluating the Success of Refracs
  • Case Studies and Examples


First day will be held at Holiday Inn (Former Sofitel Hotel), in Cairo. The participants will fly the next day to Hurghada. The course will be continued in Hurghada.


Inclusive of refreshment and lunch at the Holiday Inn (Former Sofitel Hotel). Air Ticket Cairo/Hurghada return and accommodation in Hurghada.


Tim Leshchyshyn, P. Eng. has a Chemical Engineering Degree from the University of Alberta with 25years' experience in the field of Petroleum Engineering. As president of Frac Knowledge, the only independent fracturing engineering group in Canada, one of five in the world, he leads a group of 25 employees and consultants whose clients include 70 operators and service companies in 17 countries on five continents. The work on conventional and unconventional oil and gas wells has included reviewing past fracs for design or operational improvements, optimizing frac designs, and supervising the execution of fracs. Direct execution of the fracs ensures quality assurance and design changes minute by minute and stage by stage to maximize the goals of the frac. Often integration of petrophysical rock mechanics, injection tests calibrating models and frac simulators are commonly employed.

He has also released the largest online frac and completions database for Canada and the United States. This database is tied to production provided on a map and table interface. It contains scanned well files, daily operations reports, logs and various other documents, and used as a source for the details of the presentations he gives and courses he teaches.

In the past as an employee, he has worked for operators, national oil companies, service companies and research institutes. Experience includes teaching courses, optimizing horizontal multistage fractured, supervising fracturing operations and multi-client studies. Mr. Leshchyshynis also the main inventor on 20 fracturing patents and is an expert in fracfluid chemistry, proppant, and business development. He is a member of APEGA, SPE board of director, CSUR technical committee member and PTAC and is involved in organizing conferences, courses and other technical events.