The problem of maintaining oil production levels shouldn’t only be related to oil production intensification or increasing the reserves by geological exploration and new fields commissioning, but also due to the large-scale application of enhanced oil recovery. One of the well-known and relatively cheap to implement hydrodynamic methods of enhanced oil recovery technology is cyclic waterflooding. The technology consists of creating in a formation unsteady pressure differentials between layers and regions of different permeability via systemic change in well operating mode. The mechanism of enhanced oil recovery consists of water injection into stagnant oil-saturated low-permeability layers during increased water injection and displacing oil along with a part of the penetrated water into active drainage zones during reduced injection. Further development of cyclic waterflooding method involves the use of threedimensional hydrodynamic modeling for zones and regions selection and development of well operating strategy. Based on multivariate three-dimensional hydrodynamic modeling of cyclic waterflooding for different oil field conditions a normalized criteria for the technology applicability is obtained. Map constructing algorithm to locate favorable areas and wells for the implementation of the technology is proposed.
References
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