An Assessment of Tight Oil Resource Potential in the Upper Cretaceous Cardium Formation, Western Canada Sedimentary Basin
详细信息
- 责任者：Chen Zhuoheng (Geological Survey of Canada ; Natural Resources Canada ; NW Calgary T2L 2A7 ; Canada) ; Kirk G Osadetz
- 刊名：Petroleum Exploration and Development
- 出版年：2013
- 卷期：40(3)
- 关键词：非常规天然气 ; unconventional gas ; 加拿大 ; Canada
- 页码：p.320-328
- 图表：illus., 24 refs.
- 分类号：1003
- issnNo：ISSN1000-0747
- isbnNo：CN11-2360/TE
摘要
The Cardium "halo oil" occurs either in the fringe of or between existing conventional discrete sandstone reservoirs and it is commonly associated with conventional oil and gas pools in stratigraphic traps in the Western Canadian Sedimentary Basin.This paper uses the geological model-based simulation approach to assess the "halo oil" resource potential in the Cardium Formation.This geological model-based approach,consisting of a geological model,a resource model and a stochastic modeling procedure,extracts essential information regarding the richness and spatial characteristics of oil resources from a variety of data sources using statistical methods and integrates this information with the geological and resource models respectively to estimate the resource potential.This approach predicts the resource potential,the spatial distribution of the resource and the exploration risk.These outputs provide critical information for exploration decision-making.The Cardium "halo-oil" assessment result indicates a mean total oil in-place(conventional and unconventional) of 46×108 m3 and a mean undiscovered "halo oil" in-place of 29×108 m3.Using current technology and economic constraints,the undiscovered recoverable "halo oil" in this tight reservoir is 1.1×108 m3,representing less than 4% of the remaining in-place oil resource,but accounting for 38% of total recoverable oil in the same formation.A comparison with resource estimates obtained using a well-performance approach based on the extrapolation of production data from stimulated horizontal wells suggests that the mean recoverable estimates obtained using the two different approaches are compatible,suggesting that the geological model-based approach provides a reliable estimate of oil resource potential.