Determination of fracture network parameters using multi-rate well test data

The objective of this paper is to investigate the fracture parameters for oil fracture reservoirs by using multi-rate well test data. This work is based on the steady state flow of homogenous liquid through fracture network toward wells using Kazemi and Warren-Root models. Multi-rate well testing is powerful tools that could describe quantitatively the fracture networks. For constant oil production rate, if the fracture density (i.e. number of fracture) increases, then the drawdown of oil well decreases. On the other hands, by decreasing the fracture density, the drawdown increases. Therefore, the drawdown of the well could be related to the fracture network and could provide the data about the fracture reservoir characterization. This study based multi-rate well testing and two main prevailing of fracture model (i.e. Kazemi and Warren-Root) tried to obtain the fracture reservoir characterization that includes permeability of fracture and matrix, porosity of fracture, Arial fracture density, block size and fracture opening. Also, these data could be assisted to calculate the water and gas coining. Finally, the modeling was carried out for two Iranian fracture reservoirs in South. The results show very good agreement between Warren-Root model and fracture image log.

Keywords:

fracture parameters , fracture network , well testing , gas coning , water coning