Performance of horizontal wells in composite tight gas reservoirs considering stress sensitivity

Abstract

Tight gas reservoir (TGR) plays an important role in unconventional oil and gas resources. The existing seepage models for TGR rarely consider the effects of heterogeneity, stress-sensitivity, and the unsteady fluid exchange between matrix and fracture. Heterogeneity is common for tight gas reservoir which should be carefully considered in geological model. The stress-sensitivity effect of fracture is an important factor influencing the transient flow behavior of TGR. Ultra-low porosity and permeability cause the unsteady flow between matrix and fractures systems. So this paper introduced a mathematical model for the horizontal well in a dual-porosity composite tight gas reservoir with considering the stress-sensitivity effect and unsteady flow between matrix and fractures systems. Some mathematical methods including the finite Fourier cosine transform, perturbation technique, Laplace transform, superposition principle, Stehfest numerical inversion algorithm are used to solve the nonlinear partial differential equation. Different flow regimes are divided based on pressure transient analysis curves. The sensitivity analysis of related parameters is studied according to pressure transient analysis and rate transient analysis curves. The presented model and obtained results in this paper give better understanding on pressure and rate transient behaviors of composite TGR.

Cited as: Zhao, K., Du, P. Performance of horizontal wells in composite tight gas reservoirs considering stress sensitivity. Advances in Geo-Energy Research, 2019, 3(3): 287-303, doi: 10.26804/ager.2019.03.07

References

Albinali, A., Holy, R., Sarak, H., et al. Modeling of 1D anomalous diffusion in fractured nanoporous media. Oil Gas Sci. Technol. 2016, 71(4): 56.

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.

Chang, J., Yortsos, Y.C. Pressure transient analysis of fractal reservoirs. SPE Form. Eval. 1990, 5(1): 31-38.

de Swaan, A. Pressure transients in a fractal-cluster model of porous media. Oil Gas Sci. Technol. 2016, 71(1): 9. de Swaan, O.A. Analytic solutions for determining naturally fractured reservoir properties by well testing. Soc. Petrol. Eng. J. 1976, 16(3): 117-122.

Ding, D.Y., Farah, N., Bourbiaux, B., et al. Simulation of matrix/fracture interaction in low-permeability fractured unconventional reservoirs. SPE J. 2018, 23(4): 1389-1411.

Ezulike, O., Igbokoyi, A. Horizontal well pressure transient analysis in anisotropic composite reservoirs-A three dimensional semi-analytical approach. J. Pet. Sci. Eng. 2012, 96: 120-139.

Freeman, C.M., Moridis, G.J., Blasingame, T.A. A numerical study of microscale flow behavior in tight gas and shale gas reservoir systems. Transp. Porous Media 2011, 90(1): 253-268.

G ¨oktas, B., Ertekin, T. Performances of openhole completed and cased horizontal/undulating wells in thin-bedded, tight sand gas reservoirs. Paper SPE 65619 Presented at SPE Eastern Regional Meeting, Morgantown, West Virginia, 17-19 October, 2000.

Holditch, S.A. Tight gas sands. J. Pet. Technol. 2006, 58(6): 86-93.

Jia, C., Zheng, M., Zhang, Y. Unconventional hydrocarbon resources in China and the prospect of exploration and development. Pet. Explor. Dev. 2012, 39(2): 139-146.

Jiang, R., Gao, Y., Sun, Z., et al. Rate transient analysis for horizontal well passing through inner region of composite gas reservoir. Natural Gas Geoscience 2015, 34(2): 81-85. (in Chinese)

Kazemi, H. Pressure transient analysis of naturally fractured reservoirs with uniform fracture distribution. Soc. Petrol. Eng. J. 1969, 9(4): 451-462.

Kuchuk, F.J., Biryukov, D., Fitzpatrick, T. Rate transient and decline curve analyses for continuously (dual-porosity) and discretely naturally fractured reservoir. Paper SPE 170698 Presented at SPE Annual Technical Conference and Exhibition, Amsterdam, The Netherlands, 27-29 October, 2014.

Li, X., Cao, L., Luo, C., et al. Characteristics of transient production rate performance of horizontal well in fractured tight gas reservoirs with stress-sensitivity effect. J. Pet. Sci. Eng. 2017, 158: 92-106.

Naik, G.C. Tight gas reservoirsan unconventional natural energy source for the future. Accessed on 3 April 2007.

Ngo, T.D., Fourno, A., Noetinger, B. Modeling of transport processes through large-scale discrete fracture networks using conforming meshes and open-source software. J. Hydrol. 2017, 554: 66-79.

Nie, R., Meng, Y., Jia, Y., et al. Dual porosity and dual permeability modeling of horizontal well in naturally fractured reservoir. Transp. Porous Media 2012, 92(1): 213-235.

Noetinger, B. A quasi steady state method for solving transient Darcy flow in complex 3D fractured networks accounting for matrix to fracture flow. J. Comput. Phys. 2015, 283: 205-223.

Ozkan, E., Raghavan, R., Joshi, S.D. Horizontal well pressure analysis. Paper SPE 16378 Presented at SPE California Regional Meeting, Ventura, California, 8-10 April, 1987.

Pedrosa Jr, O.A. Pressure transient response in stress-sensitive formations. Paper SPE 151155 Presented at SPE California Regional Meeting, Oakland, California, 2-4 April, 1986.

Shi, G., Nie, R., Lu, J., et al. Well test model of horizontal well in 2-zoned composite reservoir and example interpretation. Journal of Southwest Petroleum University (Science & Technology Edition) 2012, 34(5): 99-106. (in Chinese)

Shi, Y., Sun, X. Stress sensitivity analysis of Changqing tight clastic reservoir. Pet. Explor. Dev. 2001, 28(5): 85-87.

Stehfest, H. Algorithm 368: Numerical inversion of Laplace transforms [D5]. Commun. ACM 1970, 13(1): 47-49.

Van Everdingen, A.F., Hurst, W. The application of the Laplace transformation to flow problems in reservoirs. J. Pet. Technol. 1949, 1(12): 305-324.

Wang, X., Liu, C. Pressure analysis for horizontal wells in composite. Acta Petrolei Sinica 1997, 18: 72-77. (in Chinese)

Warren, J.E., Root, P.J. The behavior of naturally fractured reservoirs. Soc. Petrol. Eng. J. 1963, 3(3): 245-255.

Wu, Y., Li, J., Ding, D., et al. A generalized framework model for the simulation of gas production in unconventional gas reservoirs. SPE J. 2014, 19(5): 845-857.

Xu, B., Haghighi, M., Li, X., et al. Development of new type curves for production analysis in naturally fractured shale gas/tight gas reservoirs. J. Pet. Sci. Eng. 2013, 105: 107-115.

Xu, J., Guo, C., Wei, M., et al. Production performance analysis for composite shale gas reservoir considering multiple transport mechanisms. J. Nat. Gas Sci. Eng. 2015, 26: 382-395.

Yu, Z., Xiong, W., Gao, S., et al. Stress sensitivity of tight reservoir and its influence on oilfield development. Acta Petrolei Sinica 2007, 4: 95-98. (in Chinese)

Zhang, H., Kang, Y., Chen, Y., et al. Deformation theory and stress sensitivity of tight sandstones reserviors. Natural Gas Geoscience 2004, 15(5): 482-485. (in Chinese)

Zhang, W., Jiang, R., Xu, J., et al. Production performance analysis for horizontal wells in composite coal bed methane reservoir. Energy Explor. Exploit. 2017, 35(2): 194-217.

Zhang, W., Xu, J., Jiang, R., et al. Employing a quad-porosity numerical model to analyze the productivity of shale gas reservoir. J. Pet. Sci. Eng. 2017, 157: 1046-1055.