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Gas Reserves Estimates by
Different Studies
 Reserve
estimation is very important for the proper planning of
the energy sector of the country. However, it must be
recognized that the reserve estimation is a dynamic
process and the reserve of a field/country needs to be
updated with the exploration, production and development
activities. When it comes to reserve, one needs to have
clear understanding of some technical terms to avoid
confusion. When talking about the reserve, people often
get confused by the interchanging use of the terms
reserve and the gas initially in place (GIIP). GIIP is
the total amount of gas found initially in a reservoir
when the reservoir is discovered. However, GIIP needs to
be updated with additional information as a result of
production and development activities. Reserve is that
portion of the GIIP that can be produced from the
reservoir under the present technical and economic
conditions. Another term that is quite frequently used
now a days is reserve growth. Reserve growth is the
additional reserve over that of the previous estimate of
the discovered fields as a result of additional
appraisal cum development activities and/or application
of new technology. Finally, resource potential of a
country means probability of finding new reserve in
addition to that already discovered. Resource potential
is a probabilistic estimate, and information like
geological data, exploration history of the region,
exploration history of similar but mature basins of
other region, etc., are used in this kind of study.
‘Sangu’ the offshore natural gas
field (being developed by Cairn Energy, Shell, and
Halliburton) is situated in Block 16 of the Bay of
Bengal, 30 miles southwest of Chittagong. Production
from Sangu, Bangladesh's first offshore field (with
estimated reserves of around 850 Bcf), began in June
1998. Sangu is one of Bangladesh's most important
natural gas discoveries to date, and the first
foreign-run natural gas field. In January 2000, Shell
Bangladesh Exploration and Development -- SBED -- along
with partners Cairn Energy and HBR Energy reportedly
discovered a new natural gas field near Sangu (South
Sangu-1).
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 Bangladesh has a natural gas
resource potential of 8.43 TCF with 95% probability,
65.7 TCF with 5% probability, with a mean potential of
32.12 TCF. The offshore has a potential of 2.44 TCF with
a 95% probability and 17.37 TCF with 5% probability with
a mean potential of 8.05 TCF.
Source:
An Exploratory Review Of
Bangladesh Gas Sector: Latest Evidence And Areas Of Further Research
http://www.nbr.org
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