Improving the efficiency of field development in integrated engineering solutions using multistage multi-zone hydraulic fracturing

Background. The article discusses such a technological direction as multistage hydraulic fracturing and its development on classical terrigenous reservoirs. Together with hydraulic fracturing technologies, the issue of optimizing completion and development systems to reduce capital costs is relevant. In such conditions, it is important to find solutions that allow achieving the maximum potential from reservoir stimulation. The work in this direction includes a complex of engineering solutions tested at the pilot-industrial site of the Yuzhno-Priobskoye field, where the technology of multistage multi-zone hydraulic fracturing (MMGRP) was tested.

Materials and methods. As a basic approach to achieve maximum coverage of the reservoir by fracturing fractures, was chosen a reversal of the horizontal section of wells in the direction of minimum horizontal stress. This is due to the need to create transverse cracks in the process of stimulation in order to achieve maximum effect from the technology. Completion complex was represented by equal- pass cemented tubing with length of horizontal section is 2000 m. Each stage consisted of three clusters, the choice of the position of which was based on a complex of factors and calculations, including the analysis of geomechanical data.

Results. The authors show the company’s internal experience, industrial tests, methods and schemes of technology adaptation. The results presented in the article allow us to conclude that the synergy from a set of solutions, with a qualitative approach, can have an effect in the form of additional profit due to the optimization of the process and the choice of stimulation technology.

Conclusion. Detailed data processing in the Planar 3D module with further verification on the hydrodynamic simulator at the stage of preparatory work served as a successful scientific and practical basis for the qualitative and effective implementation of the MMGRP technology. The number of perforations and their distribution was confirmation on analytical models. This parameter is a prerequisite for the effective implementation of this technology when distributing the injected mixture into clusters and creating planar fractures in them. Production estimation and the results obtained on experimental field tests due MMGRP technology in conditions of a limited drainage area change the understanding of methods of completion and stimulation of low-permeability reservoirs at TRIZ facilities.

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