The article discusses the features of the wells operation at one of the objects of the pre-Jurassic complex (Triassic deposits). The structure of the production fund at this facility is as follows: 66% of wells operate in a constant mode, 34% - in a periodic mode.
The artdevelopment of the object of the Pre-Jurassic complex is carried out in difficult geological and physical conditions. The structure production well stock under consideration is following: 66% of wells operate in constant mode, 34% in periodic one. When nominal capacity of electric submersible pump (ESP) are less than 35 m3/day, stable wells operation in a constant mode without stopping for emergency protection is a complex task and requires considerable attention of the personnel of the technological services of oil and gas production workshops. The transfer of wells operation to a periodic or short-term mode is accompanied by wells production decrease and unstable depression on the formation. Basic measures to optimize the technological regime without lifting subsurface pumping equipment are associated with regulating ESP performance using a frequency converter or a method of tapping at the wellhead. In order to reduce the number of ESP stops and oil production losses, a technical specification was formulated for adjustable fitting development, the installation of which does not require changing the strapping of the fountain fittings. A patent study was carried out, which showed that this design solution has no analogues that have a set of these advantages. This made it possible to patent the design as an intellectual property of Surgutneftegas PJSC. Based on the analysis of the operation of submersible equipment under the complicated operating conditions of the wells of the pre-Jurassic complex of the Trias formation, the highest efficiency for continuous operation was obtained by ESP -25 with the possibility of a stepless change in productivity at the wellhead using an adjustable fitting block.
References
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