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Rate transient analysis (RTA) plays a significant role in the research and development sector of petroleum industry to know about the reserves and physical properties of commercially expected hydrocarbon fluids of a petroleum field. In this research, to conduct a rate transient analysis study; reservoir properties, well properties and Production data over the year of 2007 from two gas producing wells, Well-07 and Well-10 of Habiganj gas field, Bangladesh were used. There are two gas zones in this gas field: upper gas sand (UGS) and lower gas sand (LGS). Only UGS was considered as a gas reservoir in this research work due to no producing well in LGS. Software FEKETE, F.A.S.T.RTA TM (version 4.5.1.277), IHS Inc. was used to conduct this research. The objectives of this research were to estimate gas initially in place (GIIP) and expected ultimate recovery (EUR) of Well-07 and Well-10, to determine permeability and skin surrounding each of these two producing wells. After completion of the analysis, the GIIP and EUR values of Well-07 were estimated to 435.082 billion cubic feet (Bcf) and 304.558 Bcf, and those of 475.242 Bcf and 332.67 Bcf of Well-10, respectively. Skin effect and permeability in the surrounding of each of these producing wells were amounted to 7.017 and 3.0396 millidarcy (md) for Well-07 and those of 7.014 and 2.7839 md for Well-10, respectively, by the end of the year of 2007.Keywords Rate transient analysis Á Habiganj gas field Á Typecurve analysis Á Decline curve analysis Á Gas initially in place Á Expected ultimate recovery Á Skin Á Permeability List of symbolsSkin effect due to well drilling and completion S PT Pseudo-skin factor resulted from reservoir open level S PF Pseudo-skin factor due to perforation r s

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