Abstract
This article pays attention to the issues of increasing the efficiency of the development of oil fields with low-permeable polymictic reservoirs. It is possible to increase the efficiency of this process by improving the technology of their artificial water-flooding. This goal is being realized by identifying the features of the development of low-permeable polymictic reservoirs of fields in Western Siberia and creating a strategy to improve the technology of artificial waterflooding, taking into account the impact on the surface molecular properties of the reservoir system by the stages of their development. The developed strategy was substantiated in stages using hydrodynamic modeling. Also, an assessment was made of the effectiveness of the implementation of low-salinity waterflooding at the late stage of development of low-permeability polymictic reservoirs, the optimal time for changing the waterflooding agent from formation water to fresh water was determined.
Highlights
At present, the world structure of hydrocarbon resources and reserves [1] looks in such a way that oil geologists are increasingly faced with such reservoir rocks, for which technologies widely recommended in the world practice of oil field development are technologically and economically unprofitable
This goal is being realized by identifying the features of the development of low-permeable polymictic reservoirs of fields in Western Siberia and creating a strategy to improve the technology of artificial waterflooding, taking into account the impact on the surface molecular properties of the reservoir system in accordance with the stages of their development
Summarizing the information presented before, it can be stated that the optimal strategy for flooding of the low-permeable polymictic reservoirs can be presented by the stages: 1. Study of the predominant nature of wettability of reservoir rocks and capillary effects at the exploration stage and design of selective well pattern; 2
Summary
The world structure of hydrocarbon resources and reserves [1] looks in such a way that oil geologists are increasingly faced with such reservoir rocks, for which technologies widely recommended in the world practice of oil field development are technologically and economically unprofitable. The significant number of oil fields currently being developed with productive low-permeable polymictic reservoirs are characterized by the presence of objects that have not been put into development. The prevalence of the geomechanical approach is traced in the existing trends [2] for improving the development systems of such fields, and there is practically no consideration of the impact on the surface molecular properties of reservoir systems when organizing waterflooding systems. The use of traditional waterflooding methods is characterized by the development of reservoirs, which are characterized by both low rates of production and low final oil recovery. It is necessary to develop an optimal strategy for improving artificial waterflooding systems in fields with such reservoirs from the standpoint of physicochemical processes occurring when oil is displaced by water
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