If in traditional terrigenous reservoirs organic matter is represented by free mobile oil that migrated from oil source deposits, then the Bazhenov formation simultaneously contains kerogen, hydrocarbon compounds physically associated with kerogen or the mineral matrix, as well as free hydrocarbon compounds that form accumulations of mobile oil in connected and isolated pores. This explains the need to create an unconventional approach to conducting multi-stage hydraulic fracturing on the reservoirs of the Bazhenov formation. The paper considers the experience of performing the multi-stage hydraulic fracturing on the Bazhenov formation reservoirs using low-viscosity fluids in horizontal wells with ball&drop completion. Various approaches to the hydraulic fracturing are described and their modeling is performed in the hydraulic fracturing simulator RN-GRID. The results of design remodeling based on actual data of two horizontal wells multistage hydraulic fracturing are presented. New modified technology of Bazhenov formation multistage hydraulic fracturing, based on gained experience and developed injection method, is presented. The prospects of using the proposed technology are shown, based on the obtained results. The authors give the comparison of the geological and geomechanical conditions in all horizontal wells considered in this paper to confirm the similarity of the conditions. The information presented in this article can be useful for a wide range of engineers searching for the ways of optimizing the hydraulic fracturing processes in the fields, improving the methods to increase the well productivity, reducing the cost of activities to stimulate the production and enhance oil recovery.
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