RUDN Journal of Engineering ResearchRUDN Journal of Engineering Research2312-81432312-8151Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)1925910.22363/2312-8143-2018-19-3-391-401Research ArticleSolution for geological and technological problems in carbonate sections with developed secondary capacity on the example of Volga-Ural Petroleum and Gas Province depositIsaychevaElena G<p>Senior lecturer of the Department of Geology, Mining and Oil and Gas Engineering, Engineering Academy, Peoples’ Friendship University of Russia. Research interests: geological modeling, petrophysics, complex-reservoir well-log interpretation, field reserves evaluation</p>isaycheva_eg@pfur.ruFattakhovLenar R<p>Master student of the Department of Geology, Mining and Oil and Gas Engineering, Engineering Academy, Peoples’ Friendship University of Russia. Research interests: well log interpretation methods development, field reserves evaluation.</p>fattakhovlr.adn@gmail.comAbdulkerimovRenat F<p>Master student of the Department of Geology, Mining and Oil and Gas Engineering, Engineering Academy, Peoples’ Friendship University of Russia. Research interests: well log interpretation methods development, field reserves evaluation.</p>renat.abdulkerimov@yandex.ruPeoples’ Friendship University of Russia (RUDN University)1512201819339140113092018Copyright © 2018, Isaycheva E.G., Fattakhov L.R., Abdulkerimov R.F.2018<p>As of today many of the old fields are already depleted. Replenishment of the category of oil and gas reserves from the category of prospective resources proceeds mainly due to revising the state of overor underlying layers in the already developed horizon, rather than by exploiting entirely new deposits. Current methods of allocation of complex reservoirs both according to the data of geological and technological studies and the results of commercial and geophysical studies are relevant. In this paper, solutions of geological and technological problems are considered on the example of the carbonate section of the Volga-Ural Petroleum and Gas Province in absorbing wells. Today, by the methods of borehole geophysics, reservoirs capacity in isotropic environment is effectively calculated. In the presence of fracture and cavity porosity, the standard methods of electrometry prove to be ineffective, even for a qualitative interpretation. Therefore, in the complex reservoir with a secondary porosity space structure, construction of interpretation model is used by the following methods of well logging - neutron method (NM), acoustic method (AK) and gamma-gamma density method (GGM-P). To eliminate absorptions, both standard methods and the latest developments were used. The effectiveness of the use of profile packers in absorbing wells is shown.</p>secondary porositycomplex reservoirprofile packerinterpretation modeldrillingвторичная пористостьсложный коллекторпрофильный перекрывательинтерпретационная модельбурение[Wendelshtein B.A., Rezvanov R.A. Geofizicheskie metody opredeleniya parametrov neftegazovykh kollektorov [Geophysical methods for determining the parameters of oil and gas reservoirs]. Moscow: Nedra Publ., 1978. (In Russ.)][Smekhov E.M., Dorofeeva T.V. Vtorichnaya poristost’ gornykh porod-kollektorov nefti i gaza [Secondary porosity of oil and gas rock reservoirs]. St. Petersburg: Nedra Publ., 1987. 96 p. (In Russ.)][Abdrakhmanov G.S., Khamityanov N. Patent RUS № 2491405. Rasshiritel’ skvazhin [Hole reamer]. Publ., 2009. (In Russ.)][Abdrakhmanov G.S., Ibragimov N.G. Patent RUS № 2374424. Sposob i ustroistvo izolyatsii zon oslozhneniya bureniya skvazhiny profil’nym perekryvatelem s tsilindricheskimi uchastkami [A method and device for isolating the zones of complicated drilling of a well by a profile packer with cylindrical sections]. Publ., 2009. (In Russ.)][Gus’kov I., Vakula A., Filippov V., Kirshin A., Pronin V., Maximov D., Mukhamadeev I., Timkin N. New technology and instruments for formation isolation by profiling packers. Burenie i neft’ [Drilling and oil]. 2014. No. 6. Available at: http://burneft.ru/archive/issues/2014-06/8 (accessed 04.29.2018). (In Russ.)][Timkin N. Liquidation of disastrous acquisitions with the use of equipment local well casing (OLKS295С) during construction of the well No. 71 of Kovykta field. Burenie i neft’ [Drilling and oil]. 2016. No. 2. P. 36—37. Available at: https://burneft.ru/archive/issues/2016-02/36 (accessed 04.29.2018). (In Russ.)]