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Planning of hydrofrac in wells with negative skin

Authors: R.R. Ibatullin, Dr.Sc., A.V. Nasybullin, Dr.Sc., O.V. Salimov, Ph.D. (TatNIPIneft, RF, Bugulma)

Key words: hydrofracturing, skin factor, fracture design.

Different techniques have been used to analyze and substantiate the Devonian formation permeability change with time. It has been shown that perm values are by order of magnitude lower vs. the initial in-place permeability by logging. When deciding on the fracture design, it shall be borne in mind that negative skin is characteristic of many wells penetrating the Devonian in the southeastern Tatarstan. Skin effect on hydrofrac performance in horizontal and vertical wells has also been analyzed.

References

1. Tronov V.P., Fil'tratsionnye protsessy i razrabotka neftyanykh mestorozhdeniy

(Filtration processes and the development of oil fields), Kazan': FEN Publ.,

2004, 582 p.

2. Chekushin V.F., Kolesnikov A.A., Mukhametshin M.R., Litvinenko S.A., Neftyanoe

khozyaystvo – Oil Industry, 2012, no. 4, pp. 40-42.

Key words: hydrofracturing, skin factor, fracture design.

Different techniques have been used to analyze and substantiate the Devonian formation permeability change with time. It has been shown that perm values are by order of magnitude lower vs. the initial in-place permeability by logging. When deciding on the fracture design, it shall be borne in mind that negative skin is characteristic of many wells penetrating the Devonian in the southeastern Tatarstan. Skin effect on hydrofrac performance in horizontal and vertical wells has also been analyzed.

References

1. Tronov V.P., Fil'tratsionnye protsessy i razrabotka neftyanykh mestorozhdeniy

(Filtration processes and the development of oil fields), Kazan': FEN Publ.,

2004, 582 p.

2. Chekushin V.F., Kolesnikov A.A., Mukhametshin M.R., Litvinenko S.A., Neftyanoe

khozyaystvo – Oil Industry, 2012, no. 4, pp. 40-42.



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