Introduction to Re-fracturing Fundamentals
For a more advanced offering of this course, see Re-fracturing Fundamentals: Level 2 (An Advanced Version).
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. Although this course will focus on multistage fractured horizontal wells, there is a rich history of vertical well refracturing in the last 40 years to simplify the leap to horizontals concepts and unique multistage horizontal challenges. Some background and statistics by industry will be revealed leading to an understanding of the refrac well inventory that is mounting for well candidate selection. Frac optimization and refrac design parameters will be discussed 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
Introductory to Intermediate
Before tackling the challenges and issues of refracturing your own wells, or if your business is going to be part of the service industry affected by refracturing, this course will cover basic to advanced topics including how these jobs are being done. Unconventional oil wells need to be abandoned or refractured at about 5 years, and unconventional gas wells need to be abandoned or refractured at about 10 years, and currently there are 10,000’s of wells that need to be evaluated for refracturing and industry is focusing on these lower cost methods of replacing their declining production.
This course is intended for production and completion engineers, geologists, field operation staff, and economists who are familiar with the fracturing process and interested in how refracturing is becoming a major future activity and catch up on what has been done already.
0.8 CEUs (Continuing Education Units) are awarded for this 1-day course.
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We reserve the right to substitute course instructors as necessary.
Tim Leshchyshyn, P. Eng. has a Chemical Engineering Degree from the University of Alberta with 20 years’ experience in the field of Petroleum Engineering. As president of FracKnowledge / Fracturing Horizontal Well Completions Inc, the only independent fracturing engineering group in Canada, one of four in the world, he leads a group of 25 consultants whose clients include 35 operators in 17 countries in the North and South America, Europe, Asia, and Australia, on both conventional and unconventional oil and gas wells. The work has included review past fracturing for improvement opportunities, executing current fracturing for quality assurance/customize designs per stage, designing optimal fracs on future wells using rock mechanics/frac simulators and bidding out completions programs.
He has also released online the largest frac and completions database for Canada and the United States. This database is production tied to fracturing, and includes scanned well files and various reports, which are also used as a source for the details of this presentation. Tim has 14 years of completions and frac database experience.vv
In the past as an employee, he has worked for both E&P and frac companies. Experience includes teaching courses, optimizing horizontal multistage fractured wells using petrophysics/geomechanics, frac simulators and empirical database production trending. Leshchyshyn is also the main inventor on over 17 fracturing patents and is an expert in frac fluid chemistry systems, proppant science, unconventional frac supervision, regional interdisciplinary studies and business development. He is a member of APEGGA, SPE board of director, CSUR and PTAC and helps organize conferences, courses and technical events.