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Original Article | Open Access

Main controlling factors of fracturing fluid imbibition in shale fracture network

State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing),  Beijing 100083, P. R. China
Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, P. R. China
School of Civil Engineering, The Unversity of Sydney, Sydney, NSW 2006, Australia
Process System Engineering, University of Regina, Regina, SK, Canada
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After fracturing operations, a large amount of fracturing fluid is retained in shale fracture network, resulting in low flowback efficiency. This has been attributed to the imbibition of fracturing fluid into matrix pores. However, it is unclear how the imbibition mechanism is involved, what are its governing laws and controling parameters in fracture networks? Based on the three-dimensional water imbibition theory of matrix blocks, a fracture network model is established, and a number of dimensionless controling parameters are proposed and analyzed for flowback efficiency. The results show that the imbibition characteristics of fracturing fluid in fracture network are mainly determined by two dimensionless numbers; namely, dimensionless imbibition time, fracture width, and imbibition capacity. The dimensionless imbibition time characterizes the contact time between the fracturing fluid and shale formation, which negatively correlates to the flowback efficiency. The dimensionless fracture width is the ratio of the fracture width to the rock length, which is inversely proportional to the flowback efficiency. Smaller value of the dimensionless fracture width corresponds to larger contact area of fracturing fluid and shale, leading to a lower flowback efficiency. The dimensionless imbibition capacity depicts the capacity of shale reservoirs to imbibe fracturing fluid, which has a negative linear correlation with flowback efficiency. In addition, dimensionless time and fracture width are related to the fracturing operations, and are enhanced by increasing the shut-in periods and proppant concentration. Therefore, the flowback efficiency can be controlled by changing fracturing operations. The predictive method of the flowback efficiency established here is of great significance for reservoir damage analysis and flowback regime optimization.


Akin, S., Schembre, J.M., Bhat, S.K., et al. Spontaneous imbibition characteristics of diatomite. J. Petrol. Sci. Eng. 2000, 25(3-4): 149-165.
Binazadeh, M., Xu, M., Zolfaghari, A., et al. Effect of electrostatic interactions on water uptake of gas shales: the interplay of solution ionic strength and electrostatic double layer. Energ. Fuel. 2016, 30(2): 992-1001.
Cil, M., Reis, J.C. A multi-dimensional, analytical model for counter-current water imbibition into gas-saturated matrix blocks. J. Petrol. Sci. Eng. 1996, 16(1-3): 61-69.
Dehghanpour, H., Lan, Q., Saeed, Y., et al. Spontaneous imbibition of brine and oil in gas shales: effect of water adsorption and resulting micro fractures. Energ. Fuel. 2013, 27(6): 3039-3049.
Engle, M.A., Rowan, E.L. Geochemical evolution of produced water from hydraulic fracturing of the marcellus shale, northern appalachian basin: a multivariate compositional data analysis approach. Int. J. Coal Geol. 2014, 126: 45-56.
Ezulike, O.D., Ghanbari, E., Siddiqui, S., et al. Pseudo-steady state analysis in fractured tight oil reservoirs. J. Petrol. Sci. Eng. 2015, 129: 40-47.
Gao, L., Yang, Z., Shi, Y., et al. Experimental study on spontaneous imbibition chatacteristics of tight rocks. Adv. Geo-Energ. Res. 2018, 2(3): 292-304.
Ge, H., Yang, L., Shen, Y., et al. Experimental investigation of shale imbibition capacity and the factors influencing loss of hydraulic fracturing fluids. Petrol. Sci. 2015, 12(4): 636-650.
Ghaderi, S.M., Clarkson, C.R., Ghanizadeh, A., et al. Improved oil recovery in tight oil formations: results of water injection operations and gas injection sensitivities in the Bakken formation of southeast Saskatchewan. Paper SPE 185030 Presented at SPE Unconventional Resources Conference, 15-16 February, 2017.
Ghanbari, E., Abbasi, M.A., Dehghanpour, H. Flowback voulumetric and chemical analysis for evaluating load recovery and its impact on Early-Time Production. Paper SPE 167165 Presented at SPE Unconventional Resources Conference Cananda, Galgary, Alberta, Canada, 5-7 November, 2013.
Habibi, A., Xu, M., Dehghanpour, H., et al. Understanding Rock-Fluid interactions in the montney tight oil play. Paper SPE 175924 Presented at SPE/CSUR Unconventional Resources Conference. Calgary, Alberta, Canada, 20-22 October, 2015.
Handy, L.L. Determination of effective capillary pressure for porous media from imbibition data. Petrol. Trans. AIME 1960, 219: 75-80.
Hu, Q., Ewing, P.R., Dultz, S. Low pore connectivity in natural rock. J. Contam. Hydrol. 2012, 133: 76-83.
Jiang, Y., Shi, Y., Xu, G., et al. Experimental study on spontaneous imbibition under confining pressure in tight sandstone cores based on Low-Field nuclear magnetic resonance measurements. Energ. Fuel. 2018, 4: 56-78.
Lan, Q., Ghanbari, E., Dehghanpour, H., et al. Water loss versus soaking time: spontaneous imbibition in tight rocks. Energy Technol. 2014, 2: 1033-1039.
Ma, S., Morrow, N.R., Zhang, X. Generalized scaling of spontaneous imbibition data for strongly water-wet systems. J. Petrol. Sci. Eng. 1997, 18(3-4): 165-178.
Mattax, C.C. and Kyte, J.R. Imbibition oil recovery from fractured, water-drive reservoir. SPE J. 1962, 2(2): 177-184.
Meng, M., Ge, H., Ji, W., et al. Research on the auto removal mechanism of shale aqueous phase trapping using low field nuclear magnetic resonance technique. J. Petrol. Sci. Eng. 2016, 137: 63-73.
Tao, Z.G., Zhao, F., Wang, H.J., et al. Innovative constant resistance large deformation bolt for rock support in high stressed rock mass. Arab. J. Geosci. 2017, 10(15): 341-352.
Tao, Z.G., Zhu, C., Wang, Y., et al. Research on stability of an Open-Pit mine dump with fiber optic monitoring. Geofluids 2018, 2018: 9631706.
Tian, X., Cheng, L., Cao, R., et al. A new approach to calculate permeability stress sensitivity in tight sandstone oil reservoirs considering micro-pore-throat structure. J. Pet. Sci. Eng. 2015, 133: 576-588.
Wang, X., Sheng, J.J. A self-similar analytical solution of spontaneous and forced imbibition in porous media. Adv. Geo-Energ. Res. 2018, 2(3): 260-268.
Xu, C., Li, P., Lu, Z., et al. Discrete fracture modeling of shale gas flow considering rock deformation. J. Nat. Gas Sci. Eng. 2018, 52: 507-514.
Xu, H., Tang, D., Zhao, J., et al. A precise measurement method for shale porosity with low-field nuclear magnetic resonance: A case study of the carboniferous-Permian strata in the Linxing area, eastern Ordos Basin, China. Fuel 2015, 143: 47-54.
Yang, L., Ge, H., Shen, Y., et al. Imbibition inducing tensile fractures and its influence on in-situ stress analyses: A case study of shale gas drilling. J. Nat. Gas Sci. Eng. 2015, 26: 927-939.
Yang, L., Ge, H., Shi, X., et al. The effect of microstructure and rock mineralogy on water imbibition characteristics in tight reservoirs. J. Nat. Gas Sci. Eng. 2016, 34: 1461-1471.
Zolfaghari, A., Dehghanpour, H., Ghanbari, E., et al. Fracture characterization using flowback salt-concentration transient. SPE J. 2016, 21(1): 233-244.
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Cite this article:
Yang L, Wang S, Cai J, et al. Main controlling factors of fracturing fluid imbibition in shale fracture network. Capillarity, 2018, 1(1): 1-10.










Received: 07 March 2018
Revised: 29 March 2018
Accepted: 03 April 2018
Published: 10 April 2018
© The Author(s) 2018

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