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   "This year's Annual Meeting will give attendees...a high- quality Technical Program with more posters." -Annual Meeting General Chairman, Ken Helm | | W-12 Fundamentals of Shale Reservoir Characterization: Why Shales Are Different From Other Formations Date: Friday, 23 September
Time: 8:30 a.m.-5 p.m.
Henry B. Gonzalez Convention Center, Room 217 A
Organizers: Dan Ebrom, Ali Mese, Azra Tutuncu, Jacques Leveille, Stephan Gelinsky, Cengiz Esmersoy, and Stephanie Nowak
Through the support of the SEG Research Committee Description: Sandstone and carbonate formations have been comprehensively studied for many years, as they constitute the majority of the conventional hydrocarbon reservoirs currently under production. Hence, there exists a large body of information concerning the physicochemical, mechanical and acoustic properties of these formations both through experimental studies under controlled conditions in the laboratory and from field studies. Shale formations, however, constitute a large class of rocks to which, until very recently, little study has been devoted. With the role they play as the reservoir rock in the expanding unconventional oil and gas production around the globe, shales became a major research area, giving strong motivation to the need to substantially broaden our existing knowledge of their own acoustic, mechanical, and the physicochemical behavior at in situ stress and temperature conditions. Shales are substantially anisotropic formations with a high degree of complexity: displaying complicated elasto-plastic deformation and failure characteristics, and introducing a number of wellbore stability, reservoir engineering, geomechanics and production challenges. Geophysical properties and deformation characteristics of shales are tied strongly to the clay fraction, and in particular the kind and amount of the respective clay minerals present. Clay particles are often plate-like and tend to aggregate into larger assemblages with aligned plates. The mineral anisotropy of clays could add to the anisotropy arising from aligned fabrics present in the shale microstructure. In contrast very little intrinsic anisotropy exists in reservoir rocks such as sandstones and carbonates under reservoir conditions. The magnitude of shale anisotropy seems to decrease with increasing porosity. Ignoring elastic anisotropy may lead to poor seismic imaging, inaccurate well-ties, and incorrect reservoir characterization. Schedule: | Session 1 | What can lab and well measurements tell us about resource shales? | | 8:30 am: | Welcome—Dan Ebrom | | 8:35 am: | Introductory comments for lab and well measurements—Stephanie Nowak | | 8:40 am: | Shale reservoir characterization: Are shales really that different from other formations?—Kevin Chesser | | 9:10 am: | Relationship of shale porosity-permeability trends to pore type and organic content—Joel Walls | | 9:40 am: | Break | | | | | Session 2 | What do geophysically constrained models predict about resource shales? | | 10:05 am: | Introductory comments for geophysically constrained models—Bob Tatham | | 10:10 am: | How to build an anisotropic rock physics model for shales from vertical wireline logs—Arthur Cheng | | 10:40 am: | Electromagnetic Properties of Shales—Teruhiko Hagiwara | | 11:10 am: | Seismic and aseismic deformation in shale gas reservoirs during hydraulic stimulation—Mark Zoback | | 11:40 am: | Morning speakers question and answer | | 12:00 pm: | Lunch break | | 1:00 pm: | Oral introduction to poster session | | 1:15 pm: | Impact of water saturation on shale rock properties—David Dewhurst
Shale anisotropy: How it impacts shale reservoir characterization—Niranjan Banik
Measurement of the effective pressure- Permeability tensor relationship for gas-shale—Yasser M. Metwally and Evgeni Chesnokov Shale gas and shale oil reservoir anisotropy determination using field acoustic data and geomechanics laboratory measurements—Mohammad Izadi and Azra Tutuncu
An integrated approach to analyzing fractured unconventional shale reservoirs- finding the balance between an optimal rock and an optimal completion—Chris Steinhoff and Heather Davey
| | | | | Session 3 | What do seismic and acoustic techniques have to offer in characterizing resource shales? | | 1:45 pm: | Introductory comments for characterization—Ali Mese | | 1:50 pm: | Field and laboratory characterization of shales: Implications for imaging and pore pressure analysis—Brian Hornby | | 2:20 pm: | Relationships between organic content, rock properties and seismic attributes—Marita Gading | | 2:50 pm: | Break | | | | | Session 4 | What do integrated studies have to offer in guiding development of resource shales? | | 3:15 pm: | Introductory comments for integrated studies—Jacques LeVeille | | 3:20 pm: | Fracture propagation in shales—Julia Gale | | 3:50 pm: | How the world has changed: Political, operational and geophysical challenges of a shale play—Joel Starr | | 4:20 pm: | Afternoon speakers question and answer | | 4:40 pm: | Summary Speaker—Ivar Brevik | | 5:00 pm: | Adjourn |
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