Monday, April 10
If I want to re-frac a well “just because” – maybe I am disappointed in the production – that is most likely a BAD idea. This course discusses how I can go about selecting a candidate (there are no really “good” candidates since having to re-frac indicates original fracs were not adequate) that will benefit from such a workover. Then, what extra considerations are involved in a treatment design.
Tuesday, April 11
This session provides insight at how to choose the best refracturing candidates. A rigorous screening process can greatly improve the odds of success. Presentations will provide attendees with an awareness of the intricacies necessary for well selection required for successful refrac campaigns.
Well to well frac interference, also known as “frac hits” or “well-bashing”, is becoming more prevalent in the unconventional horizontal plays of North America as operators are drilling tighter well spacing and infilling next to acreage capture wells. The phenomenon often results in a significant loss of value to the parent wells by impacting the remaining production and reserves, and can also result in the infill wells producing at less than type curve expectation. This session will present case histories and modelling studies of how refracturing can be utilized on parent wells to mitigate the negative effects of infill well frac interference; designs to mitigate frac hits will be addressed, and optional methods of mitigation will be discussed.
This session will focus on completion and coiled tubing technologies that are directly used for refrac applications. These technologies include but not limit to: (1) new or improved completion hardware, such as expandables, packers, plugs, dissolvables, etc; (2) innovative implementation of completion and/or coiled tubing systems; (3) new design methodology or tools; (4) case histories, including design and execution best practices, operation efficiency and economic consideration.
The session will explore diversion and zonal isolation options to assure re-fracture treatments are placed in the targeted locations for optimum results. These techniques have historically included chemical, ball diversion and other solid diversion materials. Typically, these methods provide simple and low cost options, but may not be as effective for isolation as the direct mechanical methods. The session will compare field results from current technologies while searching for new materials and techniques to improve diversion and zonal isolation.
The Poster Session will be held in conjunction with the Reception on Tuesday evening. The Poster Session will have topics that cover all aspects of technologies and case histories relevant to ReFracturing. The poster owners will be present during the poster session to explain and answer questions about the topics on their posters. We encourage all attendees to interact with each other during the reception, and rotate through the posters with questions and requests.
Wednesday, April 12
In this session, we will address the design considerations and attributes of re-fracturing operations as well as the stress state of the reservoir at the time of refracturing. To include, amongst other considerations, the fluid and the proppant selection and volumes, the pumping rates and pressures, pumping sequences and schedules, as well as associated applications and rules-of-thumb that will assist in the design process. The impact of depletion on reservoir stress and its implications on refracturing growth will be considered. Furthermore, the interaction of the subject refracturing treatment well and offset wells will be investigated.
Common concerns that arise around horizontal well refracturing are often centered around stimulation effectiveness and analyzing the end result: How much lateral length coverage can be achieved? Do the isolation methods work? Has new rock been contacted? Pairing the proper diagnostic tools with refracturing opportunities can help the industry better address these concerns. This session will present effective diagnostics solutions and refrac case histories that help enable the sub-surface insight needed to optimize horizontal fracturing.
How one brings re-fractured wells back on-line can make or break a re-fracturing project, yet with such high importance so very little has been written or published within the industry. Selecting and implementing the detailed procedures for restarting/opening/cleaning-up the wells can impact the longevity, the EUR and the fundamental economics of a well. Today’s low commodity prices leave no room for error and an absolute necessity to maximize the return. Find out how others have “worked-through” this critical last step. Determining the proper measure of success, is it the highest EUR or is it a maximized ROI/NPV, can have dramatic impact on project's economics. The capital spent to perform the re-fracturing has a major impact on these economics, so the most efficient use of capital is absolutely paramount. Understanding what reserves you are going after is one of the very cornerstones of a successful re-fracturing campaign and closing the design loop from results back to the next phase is imperative. This session will address all of these issues, with case histories and lively debate.
The refracturing business has seen a number of step-changes and technology leaps in recent years related to the deployment and execution of the refracs. With a focus on both ensuring and banking the economics of refracturing; this session will look to identify those key areas of refracturing technology that will help assure this. Topics to be discussed include: what will assist/improve candidate identification, operational execution, selective isolation, offset well protection, flowback/clean-up and thereby maximize the overall economics.