Page 97 - Fundamentals of Gas Shale Reservoirs

Sycamore limestone?
400 SB/TSE
ASE 75D ASE 75C
144 (44 m)
350 Upper
woodford Laminated chert HST?
ASE 61B Laminated siliceous shale
300 TOC: 3 wt%
ASE 58B CS/mfs?
TST
250 ASE 50 ASE 51D SB/TSE
ASE 47D ASE 49 133 (41 m). Facies: CS/mfs
Thicknes (ft) 200 C2 C3 C4 C5 Laminated nely crystalline

dolomite
Middle
Laminated siliceous siltstone
150 ASE 30 C1 ASE 32 woodford Laminated siliceous shale
ASE 27 TOC: 8.4 wt% TST
ASE 25
100
ASE 18 Lower 95 (29 m)
ASE 15 woodford Laminated nely crystalline
ASE 13 dolomite
50 Laminated siliceous shale
ASE 7C TOC: 11.7 wt%
Hunton limestone SB/TSE
0
0 500 1000 1500 2000
GR (counts/s)
FIGurE 4.7 Outcrop gamma ray log of the Woodford Shale in the McAlester Cemetary Quarry, Oklahoma, USA. The entire Woodford is a
second‐order depositional sequence; and eight higher frequency sequences are shown by the red arrows. A SB/TSE corresponding to a global
fluctuation in sea level occurs within the second‐order sequence. Lettered numbers alongside the gamma ray log are sample locations. General
features of the lower, middle, and upper Woodford are listed. Modified from Serna‐Bernal (2013) who provided permission to publish this figure.

400 McAlister Gamma ray API
Cemetery Henry house –1100 0 100 200 300 400 500 600 700
350 Quarry 14 Creek section Amis 1-3 ramsey
Carter county 13 Carter county murray county
14 200 12
300 12 13 11 14 13
11 10 –1200 Upper
10 12 woodford
250 9 9 10 11 9
Thicknes (ft) 200 8 7 8 Depth (ft) 0 7 8 Middle

150
6
5 Distance from base (ft) 100 6 5 5 6 woodford
4 4 4
100 3 3 –1400 3
50 2 1 2 2 Lower
Murray woodford
1 –1500
0 0 Carter C Johnston
0 500 1000 1500 0 100 200 300 400 500 600 700 800 900 1000
GR (counts/s) API
Johnston
Carter B
A
30 miles Marshal
FIGurE 4.8 McAlester Cemetary Quarry outcrop gamma ray log compared with a gamma ray log from the Henry House Creek outcrop
section and the Amis 1‐3 Ramsey well gamma ray log. Modified from Paxton et al. (2007) and Serna‐Bernal (2013), both of whom provided
permission to publish this figure.