#TITLE_ALTERNATIVE#

• Main Author: YULIAROSA (NIM : 12208054), ZANDRA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/31894
• Institution: Institut Teknologi Bandung

Coalbed Methane (CBM) reservoir is a natural gas reservoir with methane (CH4) as its primary component that is formed at the same time as the coalification of the coal. The gas was trapped and absorbed at the surface of the cleats (macropore) and held by the water pressure around it. To produce this kind of gas, it is needed a big pressure drawdown at the bottom of the well bore, so that in low bottom hole pressure condition the methane can be released from the surface of the coal. Even though, in the invention of gas in the coalbed methane reservoir, CBM reservoir would contain water which filled the coal fracture. Because of that, to produce methane it should be started with producing the water (dewatering process). Dewatering is a process to decrease water fluid level in the coal layer, so that it will be lower than the lowest coal layer that is going to be produced (can be more than one layer to be produced). The main function of dewatering is to initiate gas desorbtion in the existing micropores, which will be happening if the water hydrostatic pressure got decrease. Proper dewatering process of CBM wells is the key to a successful and efficient gas production at CBM reservoirs. In the production period of CBM reservoirs, productivity of a reservoir, considered as ratio of gas flow rate into the well with the pressure difference between the reservoir pressure and the bottomhole pressure inside the well, will be recognized as Inflow Performance Relationship (IPR) of CBM well. Because of that, IPR in the dewatering period of CBM is very important to be recognized. The development of the dimensionless IPR curve for CBM well is being done using commercial simulator (CMG) where it is built a CBM reservoir model, which considered the matrix and fracture in the coal layer. To match with the real condition, the CBM reservoir data being used will be Horseshoe Canyon reservoir data in Canada and Cedar Hill in New Mexico. Besides, it will be made 2 hypothetical models, which is in range of those two reservoirs. After that, the IPR curve of those wells will be predicted to define the dimensionless IPR