«Onshore and offshore oil and gas well construction»

Design of a rock destruction tool for core selection in a complicated cavern-fractured carbonate reservoir

UDC: 550.822.7
DOI: -

Authors:

¹ RN-Burenie, Moscow, Russia
² Institute of the Earth's Crust, Siberian Branch of the Russian Academy of Sciences, Irkutsk, Russia
³ Irkutsk National Research Technical University, Irkutsk, Russia
⁴ RANS, Moscow, Russia

Keywords: reservoir, wedge, drilling, core sampling, mechanical speed

Annotation:

Today, based on the objectives of oil and gas fields development in the Leno-Tunguska oil- and gas-bearing province, namely increasing the commercial drilling speed and reducing the risk of accidents, it is required to solve the problem of increasing the efficiency of core sampling in difficult geological conditions. The authors collected production data when drilling wells in the Irkutsk region and Krasnoyarsk Krai. Their statistical studies were carried out. The main problematic factor complicating the process of core sampling in pilot boreholes of production wells is anisotropic fracturing and cavernousness, for example, of unevenly silicified carbonate reservoirs of a natural Riphean reservoir. The secondary processes in the ancient carbonate strata of the Riphean and Vendian-Cambrian formed an extremely complex environment, anisotropic in physical, mechanical and filtration properties; one of the main processes was the silicification of reservoir rocks. As a result, sharp differences in the drill ability of both the vertical, inclined shaft and the horizontal section are recorded. It is extremely difficult to give a real forecast of the distribution of the section permeable intervals (as well as the degree of silicification). Another complicating factor that reduces routine penetration is wedging when taking cores in inclined boreholes of production wells in conditions of vertical and subvertical fracturing of the reservoir layer. Technical solutions have been proposed to optimize core sampling in complex cavernous-fractured reservoirs in terms of increasing mechanical speed and trip penetration.

Bibliography:

1. Bagautdinov R.D. Otbor kerna s tochki zreniya predpriyatiya "Burservis" // Burenie i neft'. – 2013. – № 10. – S. 54–56.
2. Bergshteyn O.Yu., Velikosel'skiy M.A., Vugin R.B. Sovershenstvovanie metodov i sredstv otbora kerna v glubokom burenii. – M.: Nedra, 1977. – 221 s.
3. Beresten' L.K. Issledovanie ratsional'nykh oblastey primeneniya tverdosplavnykh koronok rezhushchego tipa: avtoref. … dis. kand. tekhn. nauk: 04.00.19. – M., 1974. – 23 s.
4. Anomal'no pronitsaemyy "treshchinno-zhil'nyy" i "karstovo-zhil'nyy" karbonatnyy kollektor v rifee Yurubcheno-Tokhomskogo neftegazokondensatnogo mestorozhdeniya (po geologo-promyslovym dannym gorizontal'nogo bureniya) / A.G. Vakhromeev, E.M. Danilova, R.K. Razyapov [i dr.] // Geologiya i mineral'no-syr'evye resursy Sibiri. – 2014. – № 4. – S. 49–60.
5. Pat. na polez. model' 163879 Ros. Federatsiya, MPK E21B 10/43, E21B 10/54. Golovka buril'naya / R.U. Siraev, A.G. Vakhromeev, V.M. Ivanishin [i dr.]; patentoobladateli FGBUN In-t Zemnoy kory SO RAN, OAO "NPP Burservis". – № 2015127059/03; zayavl. 06.07.2015; opubl. 10.08.2016, Byul. № 22.
6. Pat. na polez. model' 163129 Ros. Federatsiya, MPK E21B 25/10. Stykovochnyy uzel kernopriemnykh trub s promezhutochnym kernoderzhatelem / R.U. Siraev, A.G. Vakhromeev, S.A. Sverkunov, R.Kh. Akchurin; patentoobladatel' FGBUN In-t Zemnoy kory SO RAN. – № 2015151807/03; zayavl. 02.12.2015; opubl. 10.07.2016, Byul. № 19.
7. Garifullin D.Z. Problemy primeneniya komponovok s VZD pri otbore kerna // Inzhenernaya praktika. – 2012. – № 7. – S. 42–45.
8. Ginzburg I.M., Ponomarev P.P. O vliyanii treshchinovatosti gornykh porod na ikh burimost' almaznymi koronkami // Tr. VITR. Metodika i tekhnika razvedki. – L., 1973. – Vyp. 88. – S. 3–38.
9. Issledovanie i razrabotka effektivnykh sredstv dlya bureniya vertikal'nykh skvazhin s otborom kerna v krepkikh abrazivnykh porodakh / N.S. Timofeev, O.N. Timonichev, O.Yu. Bergshteyn [i dr.] // Burenie. – 1970. – № 9. – S. 3–7.
10. Knyazev I.K. Buril'shchiku ob otbore kerna. – M.: Nedra, 1981. – 102 s.
11. Mukhachev A.I. Rezul'taty raboty porodorazrushayushchim instrumentom NPP "Burservis" v Krasnoyarskom krae // Vestn. assots. burovykh podryadchikov. – 2011. – № 4. – S. 14–16.
12. Nekotorye puti povysheniya effektivnosti otbora kerna v slozhnykh geologicheskikh usloviyakh / R.I. Stefurak, M.A. Myslyuk, V.Yu. Bliznyukov, S.A. Ostrovskiy // Gazovaya prom-st'. Ser.: Geologiya i razvedka gazovykh i gazokondensatnykh mestorozhdeniy: obzor. inform. – M.: IRTs Gazprom, 2000. – 74 s.
13. Opyt otbora kerna v krepkikh abrazivnykh kvartsevykh peschanikakh / Ya.A. Edel'man, A.I. Vala, L.M. Varnas [i dr.] // Burenie. – 1970. – № 3. – S. 14–16.
14. Pat. na polez. model' 168250 Ros. Federatsiya, MPK E21B 25/00. Teleskopicheskaya sistema otbora kerna / E.A. Tsaplin, N.A. Ivanov; patentoobladatel' NPP "Kompozitmash". – № 2016141597; zayavl. 24.10.2016; opubl. 25.01.2017, Byul. № 3.
15. Pat. na polez. model' 101077 Ros. Federatsiya, MPK E21B 25/00. Kernozakhvatnoe ustroystvo / Egorov N.G. – № 2010135736/03; zayavl. 26.08.2010; opubl. 10.01.2011, Byul. № 1.
16. Pat. 1819980 SSSR, MPK E21B 25/00. Kernootbornyy snaryad / M.I. Vorozhbitov, O.Yu. Bergshteyn, E.A. Ivanov [i dr.]. – № 4946660/03; zayavl. 17.06.1991; opubl. 07.06.1993, Byul. № 21.
17. Pat. 2276718 Ros. Federatsiya, MPK E21B 25/10. Kernorvatel' universal'nyy / V.V. Bol'shakov, V.V. Neskoromnykh, T.V. Shinkova; patentoobladatel' GOU VPO IrGTU. – № 2004135846/03; zayavl. 07.12.2004; opubl. 20.05.2006, Byul. № 14.
18. Pat. 1808988 SSSR, MPK E21B 25/10. Kernorvatel' / Ya.A. Edel'man. – № 4951850/03; zayavl. 28.06.1991; opubl. 15.04.1993, Byul. № 14.
19. Pat. 2182216 Ros. Federatsiya, MPK E21B 25/10. Kernorvatel' / V.V. Bol'shakov, V.V. Neskoromnykh, T.V. Shinkova; patentoobladatel' Irkutskiy gos. tekhn. un-t. – № 2000113912/03; zayavl. 31.05.2000; opubl. 10.05.2002, Byul. № 13.
20. Pat. na polez. model' 119012 Ros. Federatsiya, MPK E21B 10/43. Golovka buril'naya / M.N. Dautov, R.R. Ashimov, D.Z. Garifullin [i dr.]; patentoobladatel' OAO "NPP "Burservis". – № 2012101041/03; zayavl. 12.01.2012; opubl. 10.08.2012, Byul. № 22.
21. Tekhnika i tekhnologiya otbora kerna v stranakh dal'nego zarubezh'ya / V.Yu. Bliznyukov, R.I. Stefurak, M.A. Myslyuk, S.A. Ostrovskiy // Stroitel'stvo neftyanykh i gazovykh skvazhin na sushe i na more. – 2001. – № 1. – S. 21–26.