| The objective of this study was to develop a quantitative and computerized reservoir description technique, which can be used for simulation and enhanced oil recovery studies. The technique allows identification of flow units and subdivision of hydrocarbon reservoirs into these units. Also, this technique estimates, for the identified flow units, values of their petrophysical properties both at wells and interwell region.; The development of this reservoir description technique was attained by applying geostatistics, fractal geometry and well log interpretation methods to the study of well logs and core data. These methods were implemented in four computer programs, which were designed to generate data used in this technique. A theoretical reservoir data set was used to validate these computer programs and to illustrate the general procedure of the developed technique.; This study presented a different approach to the application of petrophysical well logs in the generation of pseudo well log data, which are used to construct depth plots of gamma ray, resistivity and porosity responses between wells. These depths plots are important, because their interpretations can give a broad view of the distribution of these log responses at the interwell region, allowing the petrophysical study of reservoirs.; The developed technique generates, from the petrophysical evaluation of the pseudo well logs, data that are used to construct depth plots of rock properties, stochastic distributions of porosity and permeability, and stochastic reservoir cross-sections of sand and shale sequences across the reservoir. This information is used for detailed studies of vertical and lateral extent and quality of potential reservoir rocks, which are important factors to the identification of flow units.; The technique generates several spatial distributions of geological and petrophysical properties, for each flow unit. These rock property distributions are used to construct areal maps, which are important to the study of hydrocarbon reservoirs, because they allow interpretation of areal extent and quality of the flow units. Also, these spatial distributions are useful to reservoir simulation and enhanced oil recovery studies.; The developed technique represents a contribution to reservoir characterization, because it allows the identification of flow units and subdivision of hydrocarbon reservoirs into these units. Also, this technique estimates, for identified flow units, the values of their petrophysical properties both at wells and interwell region. |
