Application of field and geophysical research at Achimov facilities to solve urgent development tasks

   Introduction. Often, when developing Achimov (Ah) deposits, it is very difficult to achieve well productivity corresponding to the calculated indicators, due to the peculiarities of the geological structure of the deposit itself. One of the prerequisites for cost-eff ective operation is the almost universal hydraulic fracturing (FRACKING). Accordingly, there are difficulties in understanding the propagation of fracturing cracks; at what pressures cracks collapse occurs; what tonnage of proppant to use to obtain industrial inflow, while avoiding the unification of crack systems in the Achimov strata group.

   Aim. The aim of the work is to understand the behavior of field-geophysical (PGI) methods and their informativeness in analyzing the efficiency of hydraulic fracturing in Achimov deposits.

   Materials and methods. Examples of vertical wells (VS) with hydraulic fracturing and horizontal wells (GS) with multistage hydraulic fracturing (MGRP) are considered for analysis.

   Results. When considering the material, the data from the SUN studies show that cracks can have high half-lengths along the strike, which must be taken into account when modeling such objects, since as a result we can connect non-perforated thicknesses and the actual productivity will be higher than predicted. Also, according to the results of PGI in the sun, according to the technology considered in the article, it is possible to estimate the height of cracks. To select the most informative technology and complexes when planning research in GS, it is necessary to understand the longitudinal or transverse cracks created during hydraulic fracturing.

   Conclusions. Recommendations are given on the planning of research in GS with MGRP, taking into account the results of the VS, and ideas about the possible connection of bundles after hydraulic fracturing have also appeared. It is recommended to carry out the research approach considered in the article at all Ac facilities at the assessment stage, not only to understand the infl ow profi le, but also the propagation (assessment of height and connection between bundles) of fractures created by hydraulic fracturing. It is proposed, when conducting hydraulic fracturing in the Ac, to provide an up-to-date arrangement of the completion of the HS with separating packers and control valves to simplify the conduct of geological and technical measures (GTM).

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