«Proceedings of Gubkin University»

Skin factor under binary filtration law

UDC: 622.276.1
DOI: -

Authors:

¹ Oil and Gas Researchs Institute of the Russian Academy of Sciences, Moscow, Russian Federation

Keywords: two-term filtration law, skin factor, gas fields, productivity of production wells

Annotation:

The work investigated the effect of the skin factor, that is, the factor of existence of a zone with reduced permeability in the vicinity of the well, on the resistance to filtration flow under a two-term filtration law. It is shown that the action of the skin factor leads to a multiple increase in the value of the coefficient with a quadratic in velocity term in the two-term filtration law, which causes a significant increase in reservoir pressure losses in the bottomhole zones of production wells. The results obtained make it possible to explain the difference in resistance coefficients determined in laboratory conditions and in real field conditions under the two-term filtration law, by a decrease in the permeability of the bottomhole zones of wells, which occurs both during the drilling process and during the operation of these wells. Based on the results obtained, we can conclude that when developing gas fields, the filtration processes in which are described by two-term filtration laws, it is necessary to restore the original permeability of the bottomhole zone to the maximum extent. This will significantly increase the productivity of gas production wells.

Bibliography:

1. Barenblatt G.I., Entov V.M., Ryzhik V.M. Dvizhenie zhidkostej i gazov v prirodnyh plastah. – M.: Nedra, 1984. – 211 s.
2. Zheltov Yu.P. Mekhanika neftegazonosnogo plasta. – M.: Nedra, 1975. – 216 s.
3. Rukovodstvo po issledovaniyu skvazhin / Z.S. Aliev, A.I. Gricenko, O.M. Ermilov [i dr.]. – M.: Nauka, 1995. – 523 s.
4. Zotov G.A., Tverkovkin S.M. Gazodinamicheskie metody issledovanij gazovyh skvazhin. – M.: Nedra, 1970. – 192 s.
5. Aliev I.N. Izuchenie vliyaniya prizabojnoj zony na proizvoditel’nost’ dobyvayushchej skvazhiny // Neftepromyslovoe delo. – 2023. – № 3 (651). – S. 40–42. – DOI: 10.33285/0207-2351-2023-3(651)-40-42
6. Sultanova A.V., Mamedov R.N. Ocenka vliyaniya kol’matacii prizabojnoj zony na proizvoditel’nost’ skvazhin // Neftepromyslovoe delo. – 2023. – № 2 (650). – S. 44–51. – DOI: 10.33285/0207-2351-2023-2(650)-44-51
7. K voprosu o neobhodimosti ucheta inercionnyh fil’tracionnyh soprotivlenij pri opredelenii debitov morskih gazovyh skvazhin / O.V. Nikolaev, A.N. SHandrygin, A.A. Ploskov [i dr.] // Vesti gazovoj nauki. – 2023. – № 3 (55). – S. 11–17.
8. Noman R., Shrimanker N., Archer J.S. Estimation of the coefficient of inertial resistance in high-rate gas wells // SPE Annual Technical Conference and Exhibition, Las Vegas, Nevada. – 1985. – September. – SPE-14207-MS. – URL: https://doi.org/10.2118/14207-MS
9. Geertsma J. Estimating the coefficient of inertial resistance in fluid flow through porous media // SPEJ. – 1974. – T. 15, № 05. – P. 445–450.
10. Firoozabadi A., Katz D.L. An analysis of high velocity gas flow through porous media // JPT. – 1979. – T. 31, № 02. – P. 211–216.
11. Beggs H.D. Gas production operation – Tulsa: Oil and Gas Consultants International Inc., 1984. – 303 p.