Jakarta – Indonesia’s energy resources are very large in number but have not been optimally explored. Indonesia has coal reserves of methane gas (CBM) to the 6th largest in the world.
Director General of Energy and Mineral Resources Ministry Evita Legowo said Indonesia’s current CBM reserves reached 453 trillion cubic feet (TCF) in 11 basins.
The amount of reserves that make Indonesia into the world’s number six, which has reserves of CBM. Number of occupied Russia with reserves 450-2000 TCF.
“Hopefully, in 2011, can already be generated electricity from CBM. While LNG from CBM target is reached in 2014,” Evita said as quoted by the office website on Tuesday (10/11/2011).
According to Evita is based on evaluations conducted Advanced Resources International, Inc. (ARI) in 2003, Indonesia has about 400-453 TCF of CBM reserves and ranks the 6th in the world.
Here are the results of the evaluation of ARI on CBM reserves in the world:
Russia: 450-2000 TCF
China: 700-1270 TCF
United States: 500-1500 TCF
Australia / New Zealand: 500-1000 TCF
Canada: 360-460 TCF
Indonesia: 400-453 TCF
Southern Africa: 90-220 TCF
Western Europe: 200 TCF
Ukraine: 170 TCF
Turkey: 50-110 TCF
India: 70-90 TCF
Kazakhstan: 40-60 TCF
South America / Mexico: 50 TCF
Poland: 20-50 TCF.
Indonesia most major CBM reserves located in South Sumatra for 183 TCF, TCF Barito 101.6, Kutai 80.4 TCF and 52.5 TCF of Central Sumatra.
CBM pilot project has been carried out in the Field Lemigas Rambutan in 2004. CBM cooperation contract first performed in 2008 and until September 2009, has signed 39 CBM KKS.
CBM is natural gas with a predominantly methane gas and other hydrocarbons with a slight and non-hydrocarbon gases in coal is the result of some chemical and physical processes.
CBM is the same as conventional natural gas that we know today, but the difference is associated with CBM coal as source rock and reservoir him. While natural gas as we know, although some are sourced from coal, produced from the reservoir sand, limestone and igneous rock fracture.
Another thing that distinguishes them is the manner in which mining of CBM reservoir must be engineered before the gas can be produced.
CBM is produced by coal prior to engineer (reservoir) in order to have enough space as a way out of its gas. Engineering process begins by producing water (dewatering) for the mechanics of equilibrium changes. After the pressure drops, coal gas will come out of the coal matrix.
Methane gas will then flow through the cracks of coal (cleats) and finally out into the well hole. Peak production of CBM varies between 2 to 7 years. While the period of production decline (decline) slower than a conventional natural gas.
(Dnl / hen)
