| Abstract |
While and just after drilling, various types of logging are performed for various purposes: measurements while drilling (Mwd) Allows the driller to drive the machine, mud logging is used to follow the lithology of rocks during drilling, wireline logs are used to get in-situ geological information and to derive some petrophysical rock properties, such as porosity and sometimes permeability. Usually, these loggings are carried by various contractors and results are presented in different reports but not systematically compiled in order to get permeability information in real-time or with a short delay. In that case, getting quickly a general overview of the permeable features during drillhole operation is quite challenging. Moreover, it could be very fruitful to get as fast as possible a semiquantitative interpretation of the well permeability in order to adjust the following hydraulic production testing program as well as the stimulation strategy in case of egs project. The idea of this work is trying to get the maximum of information on the petrophysical properties of the reservoir. After compiling various logs acquired, permeability will be assessed by using mwd and mud logging data. Drillhole grt-1 of ecogI project (Rittershoffen, alsace, france) Will serve as a case study. A preliminary analysis of various well logging data has been performed in this well to derive permeability estimates (Dalmais, 2014). |