Dynamic Single Well Modeling for Hydrocarbon Reservoir Characterization: Case Study of a Gas Reservoirs in South of Iran

Accurate reservoir description in hydrocarbon and water bearing zones is one of the most important steps in reservoir characterization and modeling. Information about reservoir properties can be obtained from different sources such as geological data, seismic data, well logging data, core measurement data, well test data and reservoir production history. Well test data contain valuable information on the dynamic behavior of reservoirs. It is essential to integrate all sources of information for a successful description of a reservoir. However, it is a relatively difficult task to integrate all sources of information quantitatively, since these sources of information have different resolutions.  The main objective of the third phase of this project is to find fine-scale permeability profile in the gas and water zones of the studied field. For this purpose, in a history matching process of the bottomhole pressure, the permeability distribution estimated from petrophysical and core data has been corrected by the calculated permeability from analytical well test interpretation. Of course, the other effective parameters to be adjusted during the history match of the bottomhole pressure are the skin factor and the rate-dependent skin. Capillary pressure and relative permeability should also be used for matching of DST water production data. In this study, 6 DSTs from two wells were investigated. In this report the methodology of single well simulation study including model construction, initialization and history matching for 6 DSTs has been described. The results of this study will be used as input data for the sector simulation modeling.