Expanding Boundaries of Multistage Hydraulic Fracturing with Coiled Tubing in Novoportovskoe Field

Today, when most reservoirs have low productivity, the question of whether hydraulic fracturing can be applied to the oil rims becomes very important. It was revealed that the efficient way to compensate the fractures and formation contact area under conditions of a necessary hydraulic fracturing reduction was the implementation of a special well completion technology, during which renewable frac sleeves were installed in the fullbore diameter of a liner, with sleeve density being increased for a reliable coverage of the well horizontal spacing with longitudinal fractures (Ishangaliev et al., 2017). In the complex geological conditions of the Novoportovskoye field, a fundamentally new solution was proposed for horizontal well completion – full bore MSF system with sliding sleeves, operated by hydraulic shifting key with coiled tubing (CT). This completion system allows to perform MSF without pulling CT out of the well to the surface and instantly use CT for well clenout in the case of screenout (SO). This decision is aimed to increas production and achive economic efficiency of the field development by increasing the formation coverage by means of larger number of MSF stages per well, and optimizing costs by reducing the time for the entire range of work at the well, that was detailed described by Kazakov et al., 2017. An outstanding example of oil rim stimulation and application of new technology was a project in Novoportovskoye field where 30- and 27- stage mulstistage fracturing operations were successfully performed with shifting ports comopletion operated by coiled tubing.