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Published byGunner Paskett Modified over 10 years ago
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Integration of Core and Log Petrophysics: Case Studies in the Mississippian of Kansas
John H. Doveton
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Mississippian Play in Southern Kansas
Gerlach, Sept. 2011 Spivey-Grabs Basil is the largest Mississippian oil field in Kansas with 69 million BO & 850 BCFG
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Spivey Grabs example: McCoy #1 Cornelius
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McCoy #1 Cornelius
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McCoy #1 Cornelius
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McCoy #1 Cornelius : Cyberlook
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High BVW : typical for commercial production in the Mississippi “Chat”
McCoy #1 Cornelius High BVW : typical for commercial production in the Mississippi “Chat”
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The beginning of “Chat” petrophysics
Jack Duran (Shell) 1960
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Duren (Shell) 1960: “Chat” core samples from Glick Field Porosity range: 30 – 50% Cementation exponent, m: Average: m = (range: 2.24 – 2.73) Saturation exponent, n = 1.8
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McCoy #1 Cornelius PERFORATED – IPP 63.5 BOPD + 40 MCFGPD + 43% WTR
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More on “Chat” petrophysics
Watney, Guy, and Byrnes (KGS) 2001
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Watney, Guy, and Byrnes (Bull. AAPG, 2001)
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General Atlantic #A1 Tjaden
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Watney, Guy, and Byrnes (Bull. AAPG, 2001)
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“Context petrofacies” in Tjaden :
Lithofacies + position in cycle as related to paleoperched water table? Watney, Guy, and Byrnes (Bull. AAPG, 2001)
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General Atlantic #A1 Tjaden
Conversion of m into a profile of non-connected porosity from Watfa-Nurmi equation
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THE WAY FORWARD? Software : saturation-height function modeling
Hardware : more logging tools (NMR, EPT, ….)
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Capillary pressure curves
Duren (1960) Watney et al (2001) Capillary pressure curves
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HELPFUL ADDITIONAL LOGGING MEASUREMENTS?
Magnetic resonance (NMR/CMR/MRI) Pore-body size distribution Dielectric properties (EPT) Water volume evaluation - variable m
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KGS #1-32 Wellington
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Siliceous karst breccia (cave fill
Siliceous karst breccia (cave fill?) above siliceous dolomite
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KGS #1-32 Wellington : Match of core porosities with MRI effective porosities
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KGS #1-32 Wellington : Mississippian core porosities and grain densities
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( ) ( ) F k = F k = MRI estimation of permeability
Timur-Coates equation a*[ ] k = F 2 nmr ( ) FFI BVI FFI = Free fluid index BVI = Bulk volume irreducible Fnmr = FFI + BVI SDR equation b*[ ] ( ) 2 2 F k = logavT2 nmr
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KGS #1-32 Wellington : Prediction of permeability based on MRI porosity and SDR equation versus core Kmax, K90, and Kvert permeabilities
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KGS #1-32 Wellington: The Mississippian section
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PIERSON LIMESTONE : “Dark Cowley Facies”
: medium dark gray; very argillaceous dolomitic siltstone; faintly laminated irregular; 30% silt; cm-sized irregular calcareous nodules/coarse calcite; faint lenticular bedding alternating olive gray and medium dark gray : very dark greenish gray; shale; tight; dolomitic; around 20% silt; scattered black shale laminae; uniform; scattered pyrite; 3983 starts increasing silt; gradational contact : olive gray, argillaceous dolomitic siltstone; 50% silt; wispy shale laminations; indistinct bedding; faint discontinuous laminations; gradational contact
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“The Pierson Formation”
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KIMELEON spectral GR image of the Pierson – addition of thorium, uranium, and potassium
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Moving northwards to Hodgeman County …
Gerlach, Sept. 2011 The Bindley Field – Warsaw dolomites - 3.5 million barrels oil
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Radiation-Guard (RAG)logs for Oasis #1 Deutsch, Bindley field, Hodgeman County, Kansas
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From Ebanks et al (1977)
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DRILL-STEM TESTS: DST #1: 4603 – 4641 480 feet GIP, recovered 3300 feet oil, no water DST #2: 4641 – 4694 60 feet GIP, recovered 690 feet very heavily oil & gas-cut muddy water, 60 feet oil-cut water, 60 feet water PRODUCTION Perforated: 4616 – 36 IP : 205 BOPD, No water
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Oasis #1 Deutsch NE-SE 33-21S-24W Hodgeman County, Kansas
Summary of Meramec core (modified after Reed Johnson, 1990)
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Mississippian core porosities and permeabilities from Oasis #1 Deutsch NE-SE 33-21S-24W Hodgeman County, Kansas (modified after Reed Johnson, 1990)
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Stratigraphic cross-section of the Bindley Field perpendicular to the long-axis, with Oasis #1 at the center. The distribution of lithotypes dictates the flow-unit architecture (modified from Johnson and Budd, 1994)
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REFERENCES: Duren, J.D., 1960, Some petrophysical aspects of the Mississippian “Chat” Glick Field, Kiowa County, Kansas : The Shale Shaker, September, p. 316 –321. Watney, W.L., Guy, W.J., and Byrnes, A.J., 2001, Characterization of the Mississippian chat in south-central Kansas: AAPG Bulletin, v. 85, no. 1, p. 85 – 113. Ebanks, W.J., Jr., Euwer, R.M., and Nodine-Zeller, D.E., 1977, Mississippian Combination Trap, Bindley Field, Hodgeman County, Kansas : AAPG Bulletin, v. 61, no. 3, p. 309 – 330. Johnson, R.A., 2009, Distribution and Architecture of Subunconformity Carbonate Reservoirs: Lower Meramecian (Mississippian) Subcrop Trend, Western Kansas: Unconformity Controls 1994 Symposium : Rocky Mountain Association of Geologists, p. 231 – 244. Johnson, R.A., and Budd, D.A., 1994, The Utility of Continual Reservoir Description: An Example from Bindley Field, Western Kansas: AAPG Bulletin, v. 78, no. 5, p. 722 – 743.
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