Evaluation of long-term gas hydrate production testing locations on the Alaska North Slope

SPE Reservoir Evaluation and Engineering
By: , and 

Links

Abstract

The results of short-duration formation tests in northern Alaska and Canada have further documented the energy-resource potential of gas hydrates and have justified the need for long-term gas-hydrate-production testing. Additional data acquisition and long-term production testing could improve the understanding of the response of naturally occurring gas hydrate to depressurization-induced or thermal-, chemical-, or mechanical-stimulated dissociation of gas hydrate into producible gas. The Eileen gashydrate accumulation located in the Greater Prudhoe Bay area in northern Alaska has become a focal point for gas-hydrate geologic and production studies. BP Exploration (Alaska) Incorporated and ConocoPhillips have each established research partnerships with the US Department of Energy to assess the production potential of gas hydrates in northern Alaska. A critical goal of these efforts is to identify the most suitable site for production testing. A total of seven potential locations in the Prudhoe Bay, Kuparuk River, and Milne Point production units were identified and assessed relative to their suitability as a long-term gas-hydrate-production test sites. The test-site-assessment criteria included the analysis of the geologic risk associated with encountering reservoirs for gas-hydrate testing. The site-selection process also dealt with the assessment of the operational/logistical risk associated with each of the potential test sites. From this review, a site in the Prudhoe Bay production unit was determined to be the best location for extended gas-hydrate-production testing. The work presented in this report identifies the key features of the potential test site in the Greater Prudhoe Bay area and provides new information on the nature of gas-hydrate occurrence and the potential impact of production testing on existing infrastructure at the most favorable sites. These data were obtained from well-log analysis, geological correlation and mapping, and numerical simulation.

Study Area

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Evaluation of long-term gas hydrate production testing locations on the Alaska North Slope
Series title SPE Reservoir Evaluation and Engineering
DOI 10.2118/155504-PA
Volume 15
Issue 2
Year Published 2012
Language English
Publisher Society of Petroleum Engineers
Contributing office(s) Central Energy Resources Science Center
Description 22 p.
First page 243
Last page 264
Country United States
State Alaska
Other Geospatial North Slope
Online Only (Y/N) N
Additional Online Files (Y/N) N