«Onshore and offshore oil and gas well construction»

Analysis of hydraulic fracturing application efficiency at oilfields in Stavropol Krai

UDC: 622.245
DOI: -

Authors:

¹ North Caucasus Federal University, Stavropol, Russia
² Russian Academy of Natural Sciences, Moscow, Russia

Keywords: hydraulic fracturing, well, oil, gas, reservoir rock, well bottom zone (WBZ), proppant, acid hydraulic fracturing (AHF), flow rate, low-permeable reservoirs, hydraulic fracturing complications

Annotation:

The authors of the article present a comprehensive analysis of a two-stage hydraulic fracturing (HF) program applied at 24 wells of selected oilfields in Stavropol Krai. The study covers the technological aspects of design, execution, and monitoring of the operations, with an emphasis on adapting the methods to the geological specific features of the North Caucasus. The technological aspects of the work, including the development of fracturing fluid formulations, candidate well selection, mini-fracturing, and the main operations are considered. The key problems, such as premature injection stops, deviations in fluid efficiency, and geological complications, were analyzed. Based on the data obtained, several recommendations on the process optimization were proposed. It is important to note that following these recommendations brought the average oil flow rate increase of 15–40 tons/day, confirming the effectiveness of hydraulic fracturing for low-permeable reservoirs.

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