A well-testing method for parameter evaluation of multiple fractured horizontal wells with non-uniform fractures in shale oil reservoirs
Abstract view|532|times PDF download|235|times
Abstract
Owing to intricate geological and engineering factors, the hydraulic fractures in shale oil reservoirs sometimes are in heterogeneous and random lengths, which brings a difficulty in fracture estimation. To improve this situation, a simple and quick well-testing method is presented for fracturing evaluation and parameter estimation of multiple fractured horizontal wells with non-uniform fractures. The semianalytical method and Laplace transformation are used for model solution. With the proposed model, we estimate the properties of non-uniform fractures in shale oil wells from the Ordos Basin based on the buildup testing data. Results from the case studies show that there is a good relationship between fracturing treatment parameters and generated fracture properties, including fracture length and storativity ratio (or fracture volume ratio). The fracture parameter values increase with the increase in fracturing liquid volume, especially the inner region permeability and storativity ratio. When the fracturing liquid volume per stage increases by 200-300 m3 , the fracture impacts are weaker on generated parameters, which indicates that there would be an optimized fracturing liquid volume in the field case.
Cited as: Meng, M., Chen, Z., Liao, X., Wang, J., Shi, L. A well-testing method for parameter evaluation of multiple fractured horizontal wells with non-uniform fractures in shale oil reservoirs. Advances in Geo-Energy Research, 2020, 4(2): 187-198, doi: 10.26804/ager.2020.02.07
Keywords
Full Text:
PDFReferences
Brown, M., Ozkan, E., Raghavan, R., et al. Practical solutions for pressure-transient responses of fractured horizontal wells in unconventional shale reservoirs. SPE Reserv. Eval. Eng. 2011, 14(6): 663-676.
Chen, H., Liao, X., Gao, J., et al. A well test analysis method for multi-stage fracturing horizontal wells in shale reservoirs. Xinjiang Petroleum Geology 2019, 40(3): 357-364. (in Chinese)
Chen, Z., Liao, X., Sepehrnoori, K., et al. A semianalytical model for pressure-transient analysis of fractured wells in unconventional plays with arbitrarily distributed discrete fractures. SPE J. 2018, 23(6): 2041-2059.
Chen, Z., Liao, X., Zhao, X., et al. A semianalytical approach for obtaining type curves of multiple-fractured horizontal wells with secondary-fracture networks. SPE J. 2016, 21(2): 538-549.
Cipolla, C.L. Modeling production and evaluating fracture performance in unconventional gas reservoirs. J. Pet. Technol. 2009, 61(9): 84-90.
Cipolla, C.L., Wright, C.A. Diagnostic techniques to understand hydraulic fracturing: What? why? and how? Paper SPE 59735 Presented at SPE/CERI Gas Technology Symposium, Calgary, Alberta, Canada, 3-5 April, 2000.
Clarkson, C.R., Pedersen, P.K. Tight oil production analysis: Adaptation of existing rate-transient analysis techniques. Paper SPE 137352 Presented at Canadian Unconventional Resources and International Petroleum Conference, Calgary, Alberta, Canada, 19-21 October, 2010.
Dong, P., Liao, X., Chen, Z., et al. An improved method for predicting CO2 minimum miscibility pressure based on artificial neural network. Adv. Geo-Energy Res. 2019, 3(4): 355-364.
Essca. http://essca.com/forum.php?mod=viewthread&tid=2104, 2020.
Fisher, M.K., Wright, C.A., Davidson, B.M., et al. Integrating fracture mapping technologies to optimize stimulations in the Barnett Shale. Paper SPE 77441 Presented at SPE Annual Technical Conference and Exhibition, San Antonio, Texas, 29 September-2 October, 2002.
Harikesavanallur, A.K., Deimbacher, F., Crick, M.V., et al. Volumetric fracture modeling approach (VFMA): Incorporating microseismic data in the simulation of shale gas reservoirs. Paper SPE 134683 Presented at SPE Annual Technical Conference and Exhibition, Florence, Italy, 19-22 September, 2010.
Lee, S.T., Brockenbrough, J.R. A new approximate analytic solution for finite-conductivity vertical fractures. SPE Form. Eval. 1986, 1(1): 75-88.
Li, Y., Yang, S., Zhao, W., et al. Experimental of hydraulic fracture propagation using fixed-point multistage fracturing in a vertical well in tight sandstone reservoir. J. Pet. Sci. Eng. 2018a, 171: 704-713.
Li, Z., Wu, S., Xia, D., et al. An investigation into pore structure and petrophysical property in tight sandstones: A case of the Yanchang Formation in the southern Ordos Basin, China. Mar. Pet. Geol. 2018b, 97: 390-406.
Liu, R., Jiang, Y., Huang, N., et al. Hydraulic properties of 3D crossed rock fractures by considering anisotropic aperture distributions. Adv. Geo-Energy Res. 2018, 2(2): 113-121.
Mayerhofer, M.J., Lolon, E., Warpinski, N.R., et al. What is stimulated reservoir volume? SPE Prod. Oper. 2010, 25(1): 89-98.
Ozkan, E., Brown, M.L., Raghavan, R., et al. Comparison of fractured-horizontal-well performance in tight sand and shale reservoirs. SPE Reserv. Eval. Eng. 2011, 14(2): 248-259.
Pedrosa, O.A. Pressure transient response in stress-sensitive formations. Paper SPE 15115 Presented at SPE California Regional Meeting, Oakland, California, 2-4 April, 1986.
Shakiba, M., de Araujo Cavalcante Filho, J.S., Sepehrnoori, K. Using embedded discrete fracture model (EDFM) in numerical simulation of complex hydraulic fracture networks calibrated by microseismic monitoring data. J. Nat. Gas Sci. Eng. 2018, 55: 495-507.
Stalgorova, E., Mattar, L. Practical analytical model to simulate production of horizontal wells with branch fractures. Paper SPE 162515 Presented at SPE Canadian Unconventional Resources Conference, Calgary, Alberta, Canada, 30 October-1 November, 2012.
Suliman, B., Meek, R., Hull, R., et al. Variable stimulated reservoir volume (SRV) simulation: Eagle ford shale case study. Paper URTeC 2013-057 Presented at Unconventional Resources Technology Conference, Denver, Colorado, 12-14 August, 2013.
Wang, H.T. Performance of multiple fractured horizontal wells in shale gas reservoirs with consideration of multiple mechanisms. J. Hydrol. 2014, 510: 299-312.
Wang, H. Hydraulic fracture propagation in naturally fractured reservoirs: Complex fracture or fracture networks. J. Nat. Gas Sci. Eng. 2019, 68: 102911.
Wang, J., Jia, A., Wei, Y. A semi-analytical solution for multiple-trilinear-flow model with asymmetry configuration in multifractured horizontal well. J. Nat. Gas Sci. Eng. 2016, 30: 515-530.
Yu, W., Xu, Y., Weijermars, R., et al. A numerical model for simulating pressure response of well interference and well performance in tight oil reservoirs with complex-fracture geometries using the fast embedded-discrete-fracture-model method. SPE Reserv. Eval. Eng. 2018, 21(2): 489-502.
Zhou, W., Banerjee, R., Poe, B.D., et al. Semianalytical production simulation of complex hydraulic-fracture networks. SPE J. 2013, 19(1): 6-18.
Refbacks
- There are currently no refbacks.
Copyright (c) 2020 The Author(s)
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.