石狩炭田におけるCO_2炭層貯留とECBM実験のヒストリーマッチング(<論文特集>コールベッドメタン(CBM))

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Coal beds adsorb abundant volume of methane gas, which is so-called coalbed methane gas and now utilized as an unconventional natural gas sourece in the U.S.A. Enhanced coalbed methane (ECBM) technology, which increases methane gas production by injecting carbon dcioxide(CO_2) into coal beds, is now viewed as one of the technologies to prevent the greenhouse effect. This technology may sotre the CO_2 discharged from thermal power plants in coal seams in a stable state, and in the world to investigate the possibility of this technology. In Japan, General Environmental Technos, Co., Ltd, began "Japan CO_2 Geosequestration in Coal Seams Project(JCOP)" in 2002 as a consignee of the project. As a part of the project, a micro pilot test started at the Minami Oh-Yubari district in the Ishikari coal filed n 2003, and will be continued until the end of 2007. In this research, a numerical simulation model, which is named as Ishikari Model, has been constructed with a commercially available numerical simulator, which is widely used in coalbed methane gas industry. The model is based on the reservoir paramenters obtained through the micro pilot test. Not all of the data necessary to construct the model were obtaned; therefore a history matching study was conducted to estimate some unknown reservoir parameters such as pore compressibility and gas-water relative permeability curve. The developed Ishikari Model indicated the degree of enhancement effect observed in the micro pilot test, and also the degre of permeability decrease due to CO_2 absorption on coal.
一般社団法人日本エネルギー学会の論文
2007-02-27

石狩炭田におけるCO_2炭層貯留とECBM実験のヒストリーマッチング(<論文特集>コールベッドメタン(CBM))

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