Abstract
In the development process of ultra-low permeability reservoir, due to the dual heterogeneity of matrix and fracture, it is difficult to establish effective pressure system, and water flooding occurs along the fracture. Based on the analysis of the fractured ultra-low permeability reservoir production mechanism, the imbibition characteristics and the main influencing factors of the fractured ultra-low permeability reservoir are studied by means of laboratory imbibition experiment and nuclear magnetic resonance technology (NMR). The results show that the imbibition of hydrophilic core mainly occurs in the early stage of imbibition, and there are optimal imbibition time and optimal water injection times in the imbibition process. The first soaking process has the most obvious imbibition effect; the imbibition effect mainly displaces the crude oil in the small channel and the wall of the large channel, and the displacement effect mainly acts on the crude oil in the large channel. Through the nuclear magnetic resonance technology, the displacement and imbibition effect can be calculated quantitatively; for ultra-low permeability reservoir, the reasonable injection speed suitable for imbibition and displacement is between 0.03–0.1 ml/min. The main influencing factors of imbibition include wettability, permeability, injection rate, engineering factors and working system. According to the characteristics of ultra-low permeability reservoir, the development mode of “volume fracturing + imbibition” is put forward. Applying the research results to KB oilfield, the recovery degree is predicted to be 4.1% higher than the original development plan after 7 years. The research content has guiding significance for the development of hydrophilic fractured ultra-low permeability reservoir.
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References
Sun, Q., Lin, H., Chen, S., et al.: Development technology of ultra-low permeability fractured reservoir, pp. 151–152. Petroleum Industry Press, Beijing (2009)
Aronofskfsky, J., Masse, L., Natanson, S.G.: A model for the mechanism of oil recovery from the porous matrix due to water invasion in fractured reservoir. Trans. AIME 213, 17–19 (1958)
Mattax, C.C., Kyte, J.R.: Imbibition oil recovery from fractured, water-drive reservoir. SPEJ 2, 177–184 (1962)
Jialu, W., Yuzhang, L., Maoqian, C., et al.: Experimental study on dynamic imbibition mechanism of low permeability reservoirs. Pet. Explor. Dev. 36(1), 86–90 (2009)
Li, S., Ding, Y., Meng, D., et al.: Volumetric reconstruction experiments and multi-scale simulation of tight oil reservoir with consideration of imbibition and displacement. Oil Drill. Prod. Technol. 38(5), 678–683 (2016)
Wu, Z., Zeng, Q., Li, J., et al.: New effective energy-supplement development method of waterflood huff and puff for the oil reservoir with stimulated reservoir volume fracturing. Pet. Geol. Recovery Effi. 5, 78–84 (2017)
Zhu, W., Ju, Y., Zhao, M., et al.: Spontaneous imbibition mechanism of flow through porous media and waterflooding in low permeability fractured sandstone reservoir. Acta Petrolei Sinica 23(6), 56–59 (2002)
Li, S., Liu, W., Zhang, H., et al.: Experimental study of spontaneous imbibition in low permeability reservoir. Acta Petrolei Sinica 28(2), 109–112 (2007)
Warren, J.E., Root, P.J.: The behavior of naturally fractured reservoirs. SPEJ 3, 245–255 (1963)
Kazemi, H., Merril, L.S.: Numerical simulation of water imbibition in fractured cores. SPEJ 19, 175–182 (1979)
Kazemi, H., Gilman, J.R., El-Sharkaway, A.M.: Analytical and numerical solution of oil recovery from fractured reservoirs using empirical transfer functions. Paper SPE 19849, presented at the SPE 64th Annual Technical Conference and Exhibition, San Antonio, TX, 8–11 October 1989 (1989)
Cuiec, L.E., Bourbiaux, B., Kalaydjian, F.: Oil reservoir by imbibition in low-permeability chalk. SPE Form. Eval. 9(3), 200–208 (1994)
Leventis, A., Verganelakis, D.A., Halse, M.R., et al.: Capillary imbibition and pore characterisation in cement pastes. Transport Porous Media 39(2), 143–157 (2000)
Guo, S., Huang, Y., Zhou, J., et al.: Microscopic mechanism of physical and chemical seepage, pp. 8–18. Science Press, Beijing (1990)
Wu, Q.: Volume fracturing technology for horizontal wells. Petroleum Industry Press, Beijing (2013)
Wu, Q., Xu, Y., Liu, Y., et al.: The current situation of stimulated reservoir volume for shale in U.S. and its inspiration to China. Oil Drill. Prod. Technol. 33(2), 1–7 (2011)
Zhao, Z., Du, J.: Tight oil and gas. Petroleum Industry Press, Beijing (2012)
Wu, Q., Xu, Y., Zhang, S., et al.: The core theories and key optimization designs of volume stimulation technology for unconventional reservoirs. Acta Petrolei Sinica 35(4), 706–714 (2014)
Wu, Q., Xu, Y., Wang, T., et al.: The revolution of reservoir stimulation: an introduction of volume fracturing. Nat. Gas Ind. 31(4), 7–12 (2011)
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The project is supported by CNPC’s “13th five year plan” major oil and gas field development project (Number 2019b-1310).
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Hu, Yf., Li, Bz., Wu, Zy., Hou, Jf., Peng, Hh. (2021). Study on the Technology of Imbibition in Ultra-low Permeability Reservoir. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2020. IFEDC 2020. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-0761-5_212
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DOI: https://doi.org/10.1007/978-981-16-0761-5_212
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