Page 101 - Fundamentals of Gas Shale Reservoirs

Chrono- Reservoir Litho-
stratigraphy intervals stratigraphy
Taylor
sands

HSST

TST mfs
SB
HSST mfs organic shale Bossier Bossier shale
Second order sequence TST 151my

Third order sequence HSST mfs organic shale Haynesville Haynesville shale Figure 4.13 Sequence stratigraphy of the

TST
The two third‐order sequences together form
155my Haynesville and Bossier Shales (Vorce, 2011).
a second‐order sequence. Reprinted with per-
SB/TSE Haynesville mission of Houston Geological Society, whose
lime permission is required for further use.

Well
Gamma ray
0 200
Austin Ch.

SB

mfs Upper HST
SB
Second order sequence
60 m mfs

SB Lower 93.5 my
mfs

mfs TST
SB SB/TSE
Buda Ls.
Buda Ls.

Figure 4.14 Left figure shows the Lazar Canyon outcrop of the Eagle Ford Shale. The gamma ray log in the middle is an outcrop gamma
ray log obtained by scientists scaling the cliff face (see thick arrow); the right well log shows the second‐ (long solid arrows) and third‐order
(short dashed arrows) sequence stratigraphy of the Eagle Ford. Modified from Donovan and Staerker (2010). Reprinted with permission of
the Gulf Coast Association of Geological Societies, whose permission is required for further use.