Water Distribution in the Montney Tight Gas Play of the Western Canadian Sedimentary Basin: Significance for Resource Evaluation
- James Wood (Encana Corporation)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- August 2013
- Document Type
- Journal Paper
- 290 - 302
- 2013. Society of Petroleum Engineers
- 5.1.1 Exploration, Development, Structural Geology, 2.5.4 Multistage Fracturing, 5.6.1 Open hole/cased hole log analysis, 5.8.1 Tight Gas, 5.2 Reservoir Fluid Dynamics, 1.6.9 Coring, Fishing
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- 889 since 2007
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Water distribution in unconventional gas reservoirs is a key parameter that influences many aspects of resource exploitation including selecting geographic areas for multiwell development programs, identifying target zones for horizontal wells, calculating reserves, estimating permeability, and understanding variability in gas and water production. Insights on water distribution in the Montney tight gas play of northeast British Columbia and northwest Alberta were gained by integrating reliable water-saturation measurements from full-diameter core samples with other core, well-log, and geologic data. Water distribution in the studied Montney section was found to be related to stratigraphic architecture and rock fabric (defined by degree of bioturbation), and is interpreted to have been influenced by the displacement efficiency of mobile formation water updip through tight Montney siltstones during hydrocarbon charging. Low-gradient clinoform units with few shaly zones in the Lower Montney section enabled efficient water displacement and led to water contents at or close to irreducible water saturation. Higher-gradient clinoform units with greater facies variation and common shaly zones in the Upper Montney allowed less-efficient water displacement, and significant volumes of mobile water were retained in parts of the section. Water saturation varies widely and directly influences gas effective permeability. A simple method for determining gas effective permeability from well logs was developed on the basis of empirical relationships derived from the core and log data set. Gas-effective permeability logs generated by this method help to identify target zones with superior reservoir quality for exploitation by use of horizontal multistage-fracturing technology. A Pickett plot with gas-effective-permeability lines was found to be a useful tool for a log-based comparison of Montney rock quality by stratigraphic zone or geographic area. This work shows that understanding water distribution and its influence on gas effective permeability leads to the improved delineation of "sweet spots" for resource development in unconventional gas plays.
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Adams, C. 2012. The Status of Exploration and Development Activities in theMontney Play Region of Northeast BC. Oral presentation given at theUnconventional Gas Technical Forum, Victoria, BC, Canada, 2-3 April. http://www.empr.gov.bc.ca/OG/oilandgas/petroleumgeology/UnconventionalGas/Pages/default.aspx.
Aguilera, R. 2002. Incorporating Capillary Pressure, Pore Throat ApertureRadii, Height Above Free-Water Table, and Winland r35 Values on Pickett Plots.AAPG Bull. 86 (4): 605-624. http://dx.doi.org/10.1306/61EEDB5C-173E-11D7-8645000102C1865D.
Archie, G.E. 1942. The Electrical Resistivity Log as an Aid in DeterminingSome Reservoir Characteristics. Trans. of AIME 146(1): 54-62. http://dx.doi.org/10.2118/942054-G.
Asquith, G.B. 1982. Basic Well Log Analysis for Geologists, No. 3,Tulsa, Oklahoma: Methods in Exploration Series, AAPG.
Bennion, D.B., Thomas, F.B., and Ma, T. 2000. Recent Advances in LaboratoryTest Protocols to Evaluate Optimum Drilling, Completion and StimulationPractices for Low Permeability Gas Reservoirs. Paper SPE 60324 presented at theSPE Rocky Mountain/Low Permeability Reservoirs Symposium, Denver, Colorado,12-15 March. http://dx.doi.org/10.2118/60324-MS.
Bennion, D.B., Thomas, F.B., Schulmeister, B.E. et al. 2004. Determinationof True Effective In-Situ Gas Permeability in Subnormally Water-Saturated TightGas Reservoirs. J. Cdn. Pet. Tech. 43 (10): 27-32. http://dx.doi.org/10.2118/04-10-02-PA.
Bhattacharya, J. 2009. Reevaluating Depositional Models for Shelf Shales.Article 50242, AAPG Search and Discovery. http://www.searchanddiscovery.com.
Burke, L.H., Nevison, G.W., and Peters, W.E. 2011. Improved UnconventionalGas Recovery With Energized Fracturing Fluids: Montney Example. Paper SPE149344 presented at the SPE Eastern Regional Meeting, Columbus, Ohio, 17-19August. http://dx.doi.org/10.2118/149344-MS.
Burnie, S.W. Sr., Maini, B., Palmer, B.R. et al. 2008. Experimental andEmpirical Observations Supporting a Capillary Model Involving Gas Generation,Migration, and Seal Leakage for the Origin and Occurrence of Regional Gasifers.In Understanding, Exploring, and Developing Tight-Gas Sands, S.P.Cumella, K.W. Shanley, and W.K. Camp, eds., No. 3, 29-48. Tulsa, Oklahoma:Hedberg Series, AAPG.
Camp, W.K. 2008. Basin-Centered Gas or Subtle Conventional Traps? InUnderstanding, Exploring, and Developing Tight-Gas Sands, S.P. Cumella,K.W. Shanley, and W.K. Camp, eds., Vol. 3, 49-61. Tulsa, Oklahoma: HedbergSeries, AAPG.
Clarkson, C.R., Wood, J.M., Burgis, S.E. et al. 2012. Nanopore-StructureAnalysis and Permeability Predictions for a Tight-Gas Siltstone Reservoir byUse of Low-Pressure Adsorption and Mercury-Intrusion Techniques. SPE ResEval & Eng 15 (6): 648-661. http://dx.doi.org/10.2118/155537-PA.
Coats, K.H. and Richardson, J.G. 1967. Calculation of Water Displacement byGas in Development of Aquifer Storage. SPE J. 7 (2):105-112. http://dx.doi.org/10.2118/1723-PA.
Dacy, J.M. 2010. Core Tests for Relative Permeability of Unconventional GasReservoirs. Paper SPE 135427 presented at the SPE Annual Technical Conferenceand Exhibition, Florence, Italy, 19-22 September. http://dx.doi.org/10.2118/135427-MS.
Davies, G.R. 1997. The Triassic of the Western Canada Sedimentary Basin:Tectonic and Stratigraphic Framework, Paleogeography, Paleoclimate and Biota.Bull. Canad. Petrol. Geol. 45 (4): 434-460.
Edwards, D.E., Barclay, J.E., Gibson, D.W. et al. 1994. Triassic Strata ofthe Western Canada Sedimentary Basin. In Geological Atlas of the WesternCanada Sedimentary Basin, comp. G.D. Mossop and I. Shetson, Chap. 16,257-275. Calgary, Alberta, Canada: Canadian Society of Petroleum Geologists andAlberta Research Council.
Fall, A., Eichhubl, P., Cumella, S. P. et al. 2012. Testing theBasin-Centered Gas Accumulation Model Using Fluid Inclusion Observations:Southern Piceance Basin, Colorado. AAPG Bull. 96 (12):2297-2318. http://dx.doi.org/10.1306/05171211149.
Gies, R.M. 1984. Case History for a Major Alberta Deep Basin Gas Trap: TheCadomin Formation. In Elmworth--Case Study of a Deep Basin Gas Field,J.A. Masters, ed., Memoir 38, 115-140. Tulsa, Oklahoma: AAPG.
Jones, S.C. 1997. A Technique for Faster Pulse-Decay PermeabilityMeasurements in Tight Rocks. SPE Form Eval 12 (1): 19-25.http://dx.doi.org/10.2118/28450-PA.
Keelan, D. 1986. Automated Core Measurement System for Enhanced Core Data atOverburden Conditions. Paper SPE 15185 presented at the SPE Rocky MountainRegional Meeting, Billings, Montana, 19-21 May. http://dx.doi.org/10.2118/15185-MS.
Klinkenberg, L.J. 1941. The Permeability of Porous Media to Liquids andGases. API Drilling and Production Practice: 200-213.
Lafargue, E., Marquis, F., and Pillot, D. 1998. Rock-Eval 6 Applications inHydrocarbon Exploration, Production, and Soil Contamination Studies. RevueDe L'Institut Français Du Pétrole 53 (4): 421-437.
Law, B.E. 2002. Basin-Centered Gas Systems. AAPG Bull. 86 (11): 1891-1919. http://dx.doi.org/10.1306/61EEDDB4-173E-11D7-8645000102C1865D.
Law, B.E. and Dickinson, W.W. 1985. Conceptual Model for Origin ofAbnormally Pressured Gas Accumulations in Low-Permeability Reservoirs. AAPGBull. 69 (8): 1295-1304.
Macquaker, J.H.S., Bentley, S.J., and Bohacs, K.M. 2010. Wave-EnhancedSediment-Gravity Flows and Mud Dispersal Across Continental Shelves:Reappraising Sediment Transport Processes Operating in Ancient MudstoneSuccessions. Geology 38 (10): 947-950. http://dx.doi.org/10.1130/G31093.1.
Meckel, L.D. and Thomasson, M.R. 2008. Pervasive Tight-Gas SandstoneReservoirs: An Overview. In Understanding, Exploring, and DevelopingTight-Gas Sands, S.P. Cumella, K.W. Shanley, and W.K. Camp, eds., No. 3,13-27. Tulsa, Oklahoma: Hedberg Series, AAPG.
Morgan, R. 2012. The Montney—NGLs Keep a Gas Resource Play Rockin'.Canad. Discovery Digest 1: 97-126.
Ness, S.M. 2001. The Application of Basin Analysis to the TriassicSuccession, Alberta Basin: An Investigation of Burial and Thermal History andEvolution of Hydrocarbons in Triassic Rocks. MS Thesis, University of Calgary,Calgary, Alberta, Canada.
Newsham, K.E. and Rushing, J.A. 2009. Laboratory and Field Observations ofan Apparent Sub-Capillary Water Saturation Distribution in a Tight-GasReservoir. Article 40400, AAPG Search and Discovery. http://www.searchanddiscovery.com.
Pemberton, S.G. and Gingras, M.K. 2005. Classification and Characterizationsof Biogenically Enhanced Permeability. AAPG Bull. 89 (11):1493-1517. http://dx.doi.org/10.1306/07050504121.
Pickett, G.R. 1966. A Review of Current Techniques for Determination ofWater Saturation From Logs. J. Pet Tech 18 (11): 1425-1433.http://dx.doi.org/10.2118/1446-PA.
Quirein, J., Kimminau, S., LaVigne, J. et al. 1986. A Coherent Framework forDeveloping and Applying Multiple Formation Evaluation Models. Paper presentedat the SPWLA 27th Annual Logging Symposium, Houston, Texas, 9-13June.
Shanley, K.W., Cluff, R.M., and Robinson, J.W. 2004. Factors ControllingProlific Gas Production From Low-Permeability Sandstone Reservoirs:Implications for Resource Assessment, Prospect Development, and Risk Analysis.AAPG Bull. 88 (8): 1083-1121. http://dx.doi.org/10.1306/03250403051.
Wilson, N., Zonneveld, J.P., and Orchard, M. 2012. Biostratigraphy of theMontney Formation: From the Alberta and British Columbia Subsurface to theOutcrop. Oral presentation given at GeoConvention 2012: Vision, Calgary,Alberta, Canada, 14-18 May. http://www.geoconvention.com/convention-program/technical-program/tuesday/am-2/dr-cindy-riediger-honorary-session-i.html.
Yurewicz, D.A., Bohacs, K.M., Kendall, J. et al. 2008. Controls on Gas andWater Distribution, Mesaverde Basin-Centered Gas Play, Piceance Basin,Colorado. In Understanding, Exploring, and Developing Tight-GasSands—2005 Vail Hedberg Conference, S.P. Cumella, K.W. Shanley, and W.K.Camp, eds., No. 3, 105-136. Tulsa, Oklahoma: Hedberg Series, AAPG. http://dx.doi.org/10.1306/13131053H31639.