Abstract

The article is devoted to the implementation at PJSC "Tatneft" project "Seal grid development", in which in early 2019 before the Office for well construction the task was to drill two horizontal wells at Vanaskie deposits with the length of the horizontal wells 650m and 800m. Distinctive feature is: a large offset to an entry point more than 600m, offset by downhole point – more than 1200m; a relatively small depth vertically 830м; a significant number of previously drilled wells with a high risk of crossing ;the presence of an operational column of packers in the equipment for multi-stage fracturing.

Especially given the profile design to minimize the risk of intersection with nearby wells, and examines the process of the descent of the production casing, is complicated not only a large length of the well bore and the horizontal section, and in a snap 9 packers to conduct multi-zone fracturing. To reduce the bending forces on the drill string and the likelihood of a "buckling" effect, it was decided to deviate from traditional design methods, when the initial vertical section is timed to the depth of the conductor's descent. An unconventional solution was used for the descent of the production column – the descent in the "flotation" mode without filling the column with washing liquid and without intermediate flushing during descent, while the low hydrostatic pressure did not exceed the pressure of the casing collapse. This solution made it possible to reduce the pressure on the well walls at the installation site of packers by 3‑6 times during the descent of the production column. Thus, in PJSC Tatneft, the well construction Department solved the problem of drilling a horizontal well into the Verey deposits. Thanks to engineering and technological support of construction, calculations in a specialized software package and round-the-clock monitoring without the use of expensive specialized equipment. The effective length of the productive part was 99% of the total length of the horizontal trunk.

Key words:

horizontal wells, well profile, the descent of the column, Nadolny module

References

Khuzina L.B., Shaykhutdinova A.F., Gabzalilova A.Kh. Studies of equipment stability for drill string in oil fields development. Proceedings of the International Symposium "Engineering and Earth Sciences: Applied and Fundamental Research" dedicated to the 85th anniversary of H.I. Ibragimov (ISSN2590-3217), 2019 –723-726pp.

Khuzina L.B., Mukhametshin V.S., Tyncherov K.T., Shaikhutdinova A.F. On the choice of the oscillators’ installation site// IJCET-IAEME. International Journal of Civil Engineering and Technology (ISSN09766308-Scopus), 722307]. India, 2018, 1952‑1959 pp.

Tyncherov K.T., Mukhametshin V.Sh., Khuzina L.B. Method to control and correct telemetry well information in the basis of residue number system. Journal of fundamental and applied sciences, 2017, Vol. 9, No. 2S, 1370-1374 pp.

Khuzina L.B., Gabdrakhmanov М.S. Metody regulirovaniya dinamicheskoy nagruzki dolota [Methods to control dynamic bit load]. Gornyy informatsionno-analiticheskiy byulleten', 2006, No. 8, 335‑337 pp.

Usmanov R.А., Khuzina L.B., Golub S.I. Laboratornye issledovaniya plastifitsiruyuschego, vysokoingibirovannogo burovogo rastvora dlya kynovskikh argillitov [Laboratory studies of plasticizing inhibited drilling mud for Kynovian mudstones]. Territoriya Neftegaz, 2015, No. 9, 14-18 pp.

Khuzina L.B., Fatkullin R.Kh., Shaykhutdinova A.F., Fakhrutdinov Sh.Kh., Eromasov А.V. Promyslovye ispytaniya komponovki niza buril'noy kolonny s usilennoy dinamicheskoy nagruzkoy na doloto [Field testing of bottomhole assembly with increased dynamic bit load]. Territoriya Neftegaz, 2016, No.12, 20-25 pp.

Khuzina L.B., Lyubimova S.V., Slivchenko А.F., Golub S.I., Ismagilov F.Z. Primenenie tekhnologii ustraneniya negermetichnosti ekspluatatsionnykh kolonn na primere skvazhin NGDU PAO Tatneft [Case study – Application of casing leak repair technology in Tatneft Company]. Neftyanoye Khozyaistvo, 2015, No.12., 121-123 pp.

Berdnikova D.А., L’vova I.V., Rylov N.I., Mironova L.М., Khuzina L.B. Tekhnologiya vtorichnogo vskrytiya plasta s formirovaniem protyazhennykh fil'tratsionnyh kanalov v priskvazhinnoy zone produktivnogo intervala [Casing perforation technology based on formation of extended fluid flow channels in the near-wellbore area], Neftyanoye Khozyaistvo, 2012, No.2, 90-93 pp.

Zalyatdinov А.А., Khuzina L.B., Abdrakhmanov G.S. Analiz vliyaniya kachestva izolyatsii pogloschayuschikh plastov na poteryu germetichnosti ekspluatatsionnoy kolonny [Analysis of the influence of lost-circulation zone isolation quality on casing integrity]. Neftyanoye Khozyaistvo, 2018, No. 1, 36-37 pp.

Khuzina L.B., Gabdrakhimov M.S. Oborudovanie dlya vibracionnogo bureniya skvazhin [Equipment for vibration drilling]. Gornyy informatsionno-analiticheskiy byulleten', 2006, No.2, 348-351 pp.

Authors

For citation:

A.S. Pitirimov, V.A. Kurinov, L.B. Khuzina, R.R. Khuzin, I.F. Khalitov Burenie skvazhin s vysokoj protyazhennost'yu gorizontal'nogo stvola na verejskie otlozheniya po proektu «Uplotnenie setki razrabotki» [Drilling of wells with a high horizontal bore length on Verey deposits under the project «Compaction of the development grid»]. Neftyanaya Provintsiya, No. 1(21), 2020. pp. 17-28. DOI https://doi.org/10.25689/NP.2020.1.17-28 (in Russian)