«Equipment and technologies for oil and gas complex»

Analysis of the efficiency of using coiled tubing in wells of the production fund of deposits in the Ural-Volga region

UDC: 622.276.432
DOI: -

Authors:

¹ Ufa State Petroleum Technological University, Ufa, Russia
² Bashneft-Dobycha, Ufa, Russia

Keywords: production well stock, injectivity, coiled tubing unit, packer, chemical reagent, oil flow rate

Annotation:

The authors of the article study the efficiency of coiled tubing application in operational conditions of production and injection wells using the example of one of the fields located within the Ural-Volga region. When using the injection well treatment method, the upper end of the tubing string is connected to the swivel mechanism by a flexible steel pipe. Due to this connection, during tripping operations as well as during downhole technological work, fluid can be injected through a flexible steel pipe without interruption. The considered technology of influence is widely used in injection wells with reduced injectivity rates and significant colmatation of the bottomhole formation zone. One of the important aspects of events planning is the optimal criteria determination of the influence: studies have shown that taking into account fluid saturation and formation depth as well as the duration of the deposit operation pay no significant effect on the effectiveness of the influence. In addition, it is necessary to take into account such indicators as the absence of significant technical violations as well as the tightness of the cement ring located in the impact interval. In future, the well treatment technology under consideration can be used in complex mining and geological conditions of productive formations, characterized, for example, by a high level of rocks permeability reduction. To ensure maximum efficiency of coiled tubing, it is required taking into account the geological-field characteristics of the object as well as the specific features of the workers qualification. It should be noted that the experience of implementing coiled tubing technology for repairing wells confined to the Pashiysky horizon of the Aleksandrovskaya area demonstrates high technical and economic indicators, thus having a positive effect on the quantitative results of fields development.

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