This article presents results of the development of integrated geomechanical modeling technology by means of the example of projects realized in Gazprom Neft. Current technological development along with transition to new sophisticated objects, require solutions which are based on multidisciplinary approaches to assessment of production uncertainty. Geomechanical modeling integrates geological data, data of geophysical surveys, seismic data in order to meet challenges at each stage of field life. As examples of successful implementation of Company’s geomechanical projects are Palyanovskoye, Novoportovskoye, Vostochno-Messoyakhskoye, Tsarichanskoye, Vyingayakhinskoye, Zapadno-Salyimskoye oilfields.
In particular, techniques of geomechanical modeling for conditions of the field Palyanovskoye have enabled to estimate drilling mud density, necessary for maintenance of well bore stability. Three-dimensional geomechanical models has enabled to define an arrangement of conducted faults leading to catastrophic absorption on the field Tsarichanskoye. Taking into account a data acquisition from drilling the results of modeling have led to reduce the time of well construction and increase the economic indicators of the project. Considering textural anisotropy and zones of abnormally high reservoir pressure enabled to optimize zones of initiation of hydraulic fracture and to avoid water breakthrough from overlying or underlying layers for the Vyngayakhinsky field. The fields of reorientation of tension predicted by geomechanical model for the field West Salym near tectonic violations and adjustment of an arrangement of hydraulic fracture enabled to estimate geometry and the direction of growth of the fracture, with the maximum scope of a productive interval.
The article presents that results of detailed geomechanical modeling enable to predict behavior of specific geological systems and optimize technological parameters. As a result, it is achieved a maximization of positive economic effect from specific wells operations and the field in general.
Accumulated experience and the executed projects of Gazprom Neft show that geomechanical modeling is a necessary tool enabled to reduce costs at all stages of the field production. The geomechanical model constructed under a specific objective can reduce risks when drilling and conducting a trajectory of a well, to estimate potentially perspective zones for drilling and for stimulation, to solve problems of borehole stability. Along with related subjects, the tool enables to predict in more detail the behavior of rock formationReferences
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