Feasibility study of the application of geomechanical numerical modeling in over balance drilling in one of Iran's oil fields

After identifying the petroleum resources in petroleum engineering underground drilling must be done so that we can access to oil resources to produce the reservoir fluid. There are major problems in reaching the reservoir layer, one of the major problems that oil and gas industry are commonly encountered with them, is borehole instability which has very large annual costs for oil companies. Thus, in oil industry the study of wellbore stability is strongly felt. By collection data such as in situ stress, pressure of reservoir and well, mechanics properties of drilling fluid and rock, wellbore stability would be resulted to construct the numerical modeling of geo mechanical which would help a lot for evaluating of likely risks in drilling of new wells. In this study sought to obtain a safe mud window for drilling reservoir can be safe in layers. The studies examined found that the minimum pressure in the reservoir mud Groups of ۶۰-۷۰ MPa and maximum pressure range of ۱۰۰-۱۱۰ MPa is to different depths. In order to use this model in the over balance drilling by entering the mechanical properties, modeling sustainability were doing well in the software FLAC.

Keywords:

Geomechanic , numerical modeling , stability Well , in situ stress