The Eastern area of the Orenburg oil and gas condensate field is a troublesome a target for field development due to low reservoir properties and a gas cap presence. The field is characterized by block structure. Blocks 2 and 3 have system of more extensional and permeable fractures, for this reason water injection at these objects is low efficiency. Therefore, Block 1 with a more uniform and much less dense system of microcracks was chosen as the main area for considering the enhanced oil recovery technology application. To increase the sweep and displacement efficiency, it is necessary to apply non-standard technologies, such as radial drilling and carbon dioxide injection. To evaluate the effectiveness of these technologies at the initial stage of project development in a fairly short time with the possibility of multivariate calculations, an approach was developed that consists of three stages. The first stage is selection of a sector from a full-scale hydrodynamic model, its history matching and base case calculation. The second stage is performing calculations for carbon dioxide injection, obtaining a one average well profile. At the third stage obtained profile is replicated for all wells according to the developed methodology. The article describes an approach to modeling carbon dioxide injection, which makes it possible to quickly evaluate the technology effectiveness for a single well and not use a full-scale hydrodynamic model, as well as a method for the calculation result replication using the developed calculation module in Excel, which allows to accelerate, optimize and automate the replication process.
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