Prospects for increasing the productivity of horizontal wells using integrated technologies on the example of objects in the Ural-Volga region

The paper highlights the issues of the efficiency of the operation of horizontal wells with multistage hydraulic fracturing. The experience of repeated hydraulic fracturing with preliminary preparation of the trunk by hydroblasting perforation shows effectiveness in restoring well productivity. The advantage is the possibility of selective injection of acid and proppant in a certain interval, stimulation of previously not involved in the development of layers and interlayers. This approach significantly expands the scope of application of integrated technologies for the intensification of oil production, in particular, with a high level of uncertainty arising during the development of deposits in this region. It is the introduction of relevant and advanced technologies to increase oil production rates of wells that is the source of technology development and their replication at other oil production facilities. During the retrospective analysis, the effectiveness of the work was assessed depending on various geological, physical and technological factors. It was found that the main reasons affecting the effectiveness of the operation are the orientation of the horizontal trunk along the direction of regional stress, an increase in the points of hydroblasting perforation, and the distance to the injection well. The latter, in turn, is the most important indicator in the planning of hydraulic fracturing, especially in weakly cemented carbonate reservoirs. The conducted research in the field of selecting the optimal method of influencing the target oil production facilities of the Ural-Volga region will allow subsoil users to choose the most relevant and effective way to improve the technical and economic performance of enterprises. The identified reasons, which have a significant impact on the final productivity of wells, must be taken into account when solving various tasks of improving oil production processes in long-term oil-bearing territories. Keywords: hydraulic fracturing; hydrosandblast perforation; multi-stage hydraulic fracturing; horizontal well; formation; productivity; proppant; objects of the Ural-Volga region.