Techbits: Australian Workshop Reviews State of High-Rate Gas Wells
- _ JPT staff (_)
- Document ID
- Society of Petroleum Engineers
- Journal of Petroleum Technology
- Publication Date
- September 2010
- Document Type
- Journal Paper
- 28 - 29
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Perth, Australia played host earlier this year to an SPE Applied Technology Workshop (ATW) aimed at examining the state of the art in developing and producing high-rate gas wells. Titled “High-Rate Gas Wells,” the ATW brought together 71 participants from 33 different organizations and 14 countries to uncover what the industry has learned, both in terms of best practices and pitfalls, while operating the growing number of these wells around the world.
For the purpose of this workshop, a high-rate gas well was defined as being capable of producing more than 200 MMscf/D of gas. The workshop organizers, led by Cochairs Daniel Teng of Woodside Energy and Raymond Tibbles of Schlumberger, pointed out that many wells around the world, including in Australia, Trinidad, Brazil, Qatar, and the North Sea increasingly fit that criterion.
Case studies and practical applications were presented on reservoir drainage and management; carbonate, sandface, and upper completions; subsea and surface facilities; well integrity and reliability; and intervention strategies. There was also a poster session that gave delegates the opportunity to have in-depth discussions in a relaxed environment.
Highlights of the sessions are presented below.
The first technical session, chaired by Azhar Al Kindi of Shell Upstream International and Carl Stockmeyer of Baker Hughes, focused on building an understanding of reservoir drainage for high-rate gas wells that links to well design and the infrastructure required for field development. An important challenge highlighted in this session is successfully balancing the drainage scheme and well architecture with the capacity allowance for individual wells. Presenters and audience members also discussed the complexities of some of these reservoirs and the importance of constantly re-evaluating available information, as well as how multiple sensors could be used in long intervals to evaluate production across a lateral. Inflow-control device technology was also discussed, with particular emphasis on how applicable the current technology is to high-rate gas wells.
Al Kindi and Kamel Bennaceur of Schlumberger cochaired this session on the critical aspects of managing reservoirs that are being drained by high-rate gas wells. Most of the focus was paid to the necessary tools required for effective reservoir management, and the need for good surveillance data was stressed to facilitate robust management, performance simulation, and forecasting. The session opened with a discussion on dynamic simulation to ensure deliverability from the entire completion/surface system. A discussion on the limitations of production logging followed, and the session closed with a review of how distributed temperature sensors can be used as a reservoir-monitoring tool.
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