Prevention of clays outflow located directly above the productive horizon
UDC: 622.245.422
DOI: -
Authors:
SULEYMANOV E.M.
1,
KUZNETSOV V.A.1
1 Azerbaijan State University of Oil and Industry, Baku, Azerbaijan
Keywords: clay, productive horizon, bottomhole formation zone, permeability, epoxy compound, well casing
Annotation:
In practice, a productive horizon operation, the bottom-hole zone of which is composed by weakly stable rocks, brings its destruction, thus causing production strings collapse above the perforated zone, which causes serious aftereffects and often ends by a transition to another overlying production facility, where the same complication can be observed. The best method of using synthetic resins for bottomhole formation zone (BFZ) fastening lies in filling the BFZ cavities by a mixture of quartz sand and epoxy compound, which is simultaneously used as a carrier fluid, or pumping the epoxy compound directly into the BFZ and pushing it into the rock, and then kept to form a cohesive, permeable mass. The epoxy compound is liquefied by a volatile solvent. During the period of the composition aging in the BFZ, the volatile solvent evaporates from the compound and diffuses into the well, and the resin remains in the intergranular space.
As a result of hardening, hard, permeable rock is formed. However, the method used has significant drawbacks. Therefore, a new method has been developed in order to increase the permeability of the reinforced zone, maintaining the permeability of the undamaged part of the formation and reducing the cost of the binder. The adsorbent granules impregnated by an expanding binder, for example, earthenware granules (industrial waste) impregnated by an expanding epoxy compound are used as a material for filling BFZ caverns. One of the well-known compounds, such as a compound containing epoxy resin diluted by a solvent, polyethylene polyamine (hardener) and silicon-organic liquid GKZh-94 is used as an expanding epoxy compound.
The developed method provided a more than eightfold increase of the permeability of the stone filling the cavity and a 14 % saving in binder costs. Despite the fact that the strength characteristics of the resulting stone using the developed method are lower than those ones using the well-known method, they are significantly higher than those ones required by fastening practice. The developed method of BFZ fastening does not require the use of additional equipment and is characterized by a sufficient level of readiness for industrial implementation.
Bibliography:
1. Suleymanov E.M. Issledovanie prichin proryva postoronnikh vod v zonu perforatsii na ploshchadyakh Kyursangya i Karabagly // Tr. AzNIPIneft’. – 2009. – Vyp. 54.
2. Suleymanov E.M. Sostav dlya krepleniya prizaboynoy zony plasta. Tekhnicheskaya informatsiya // AzNIINTI. Ser. Neftedobyvayushchaya promyshlennost’. – 2013. – № 4.
3. Koshelev A.T., Serenko I.A., Sidorov N.A. Povtornoe tsementirovanie pri stroitel’stve i ekspluatatsii skvazhin. – M.: Nedra, 1998. – 263 s.
4. Krylov V.I. Izolyatsiya pogloshchayushchikh plastov v glubokikh skvazhinakh. – M.: Nedra, 2000. – 304 s.
5. Solov’ev E.M. Zakanchivanie skvazhin. – M.: Nedra, 1992. – S. 103–108.
6. Spravochnik po krepleniyu neftyanykh i gazovykh skvazhin / pod red. A.I. Bulatova. – M.: Nedra, 1991. – S. 69–77.
7. Spravochnik inzhenera po bureniyu / pod red. A.I. Bulatova. – M.: Nedra, 1995. – T. 1. – S. 292–294.
8. Shadrin L.N. Tekhnologiya i organizatsiya krepleniya skvazhin. – M.: Nedra, 1995. – S. 81–89.
9. Rossiyskiy reagent RBS-3 dlya razrusheniya fil’tratsionnoy korki burovogo rastvora v prizaboynoy zone produktivnykh plastov na skvazhinakh Kaspiyskogo shel’fa / K.V. Andreev, R.A. Shadchnev, N.A. Butakova [i dr.] // Neftepromyslovoe delo. – 2021. – № 11. – S. 20–25. – DOI: 10.33285/0207-2351-2021-11(635)-20-25
10. Vliyanie usloviy prigotovleniya na parametry tamponazhnykh rastvorov / V.A. Kapitonov, M.S. Toneeva, A.A. Abramov, A.S. Kirillov // Neftepromyslovoe delo. – 2022. – № 10(646). – S. 17–19. – DOI: 10.33285/0207-2351-2022- 10(646)-17-19
11. Bykov I.Yu., Kamenskikh S.V., Ulyasheva N.M. Kompleks burovykh tekhnologicheskikh zhidkostey dlya kachestvennogo vskrytiya i krepleniya skvazhin v korrozionno-aktivnykh sredakh // Neftepromyslovoe delo. – 2022. – № 10(646). – S. 26–30. – DOI: 10.33285/0207-2351-2022-10(646)-26-30
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