Page 32 - Fundamentals of Gas Shale Reservoirs

12 GAS SHALE: GLOBAL SIGNIFICANCE, DISTRIBUTION, AND CHALLENGES

1275

751
681

485 502 521
388 396 396
273
231
138 147 162 172 180 187
3 11 15 19 20 23 25 42 50 51 63
Russia
Lithuania/Kaliningrad
South Africa
Morocco Venezuela Turkey Colombia UK Germany Ukraine Pakistan India Scandinavia Argentina/Chile Algeria, Tunisia, Libya Libya Canada Australia Australia Argentina Mexico USA China
Other Middle East
Morocco, Algeria, Western Sahara, Mauritania Paraguay, Brazil, Argentina, Bolivia
France
Poland

FIGURE 1.5 Estimated shale gas TRR (Tcf) across different countries.

Shale gas TRR by basin type 18
16 High clay
Back-arc Low clay
430 14 Med clay
6% 12
Foreland 10
1155 Passive Quantity of shale gas plays
17% 8
2506 6
37% 4
Intracratonic 2
840
12% 0
Passive Rift Intracratonic Foreland Back-arc
Rift FIGURE 1.7 Distribution of shale gas plays by basin type.
1880
28%

1.6.3 Depositional Environment
FIGURE 1.6 Shale gas TRR (Tcf) and percentage contribution
to total for each basin type. Approximately 97% of the shales were deposited in a marine
environment, and hence are likely associated with Type II
kerogen (Gluyas and Swarbrick, 2009).

intracratonic (i.e., failed rift/sag) basin, and back‐arc basin. 1.6.4 TOC Content
The proportion and relative distribution of TRR on the
basis of basin type is depicted on Figure 1.6, whilst the TOC data was available for all plays, with the exception
quantity of plays associated with each basin type is illus­ of the “whole country” resource estimates for Russia and
trated in Figure 1.7. certain Middle East nations.