A Novel Technique Applied in Early-Time Pressure Transient Analysis for Fractured Wells with Unpropped Segments
- Le Luo (China University of Petroleum Beijing) | Shiqing Cheng (China University of Petroleum Beijing) | Li Dai (China University of Petroleum Beijing) | Yang Wang (China University of Petroleum Beijing) | Jiaosheng Zhang (Research Institute of Exploration and Development, Changqing Oilfield Company, CNPC) | Changlin Ma (Research Institute of Exploration and Development, Changqing Oilfield Company, CNPC) | Haiyang Yu (China University of Petroleum Beijing)
- Document ID
- International Petroleum Technology Conference
- International Petroleum Technology Conference, 26-28 March, Beijing, China
- Publication Date
- Document Type
- Conference Paper
- 2019. International Petroleum Technology Conference
- 5.6 Formation Evaluation & Management, 2 Well completion, 2.4 Hydraulic Fracturing, 3 Production and Well Operations, 5 Reservoir Desciption & Dynamics, 5.6.3 Pressure Transient Testing, 2.5.2 Fracturing Materials (Fluids, Proppant)
- new type curves, pressure transient analysis, low permeability reservoirs, nonuniqueness problem, signal amplification technique
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Propping agents inside hydraulic fractures perform significant role in constructing high-speed flow channel to deliver fluids into wellbore. However, proppant transport in fracture is always influenced by many factors, resulting unpropped fracture. Under such situation, this paper proposes a novel pressure-transient analysis method to better interpreted created fracture properties. The application of signal amplification technology is conducted on pressure transient analysis to deal with non-uniqueness problems. Aiming at transient linear flow, trilinear flow model in fractured wells is further modified and upgraded to characterize unpropped segments. Based on the solutions, this study applied signal amplification technology to extract weak-signals to assist early-time pressure transient analysis. The new type curves regarding with pressure response in partially unpropped fracture is then generated to capture the characteristics of this phenomenon. Subsequently, sensitivity analyses make clear the effects of key parameters on pressure response, which shows the superiorities of the new type curves in pressure transient analysis. The approaches proposed by this paper undoubtly will help solve inverse problems of wells exhibiting long-period linear flow in tight reservoirs.
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Agarwal, R.G., Al-Hussainy, R., Ramey, H.J., 1970. An Investigation of Wellbore Storage and Skin Effect in Unsteady Liquid Flow: I. Analytical Treatment. SPE J., 10 (03), 279–290. http://dx.doi.org/10.2118/2466-PA.
Bahrami, H.., 2010. Using Second Derivative of Transient Pressure in Welltest Analysis of Low Permeability Gas Reservoirs. Proceedings of SPE Production and Operations Conference and Exhibition. http://dx.doi.org/10.2523/132475-MS.
Blasingame, T.A., Johnston, J.L., Lee, W.J., 1989. Type-Curve Analysis Using the Pressure Integral Method. Presented at SPE California Regional Meeting. http://dx.doi.org/10.2118/18799-MS.
Bourdet, D., Ayoub, J.A., Pirard, Y.M., 1989. Use of Pressure Derivative in Well Test Interpretation. SPE Form. Eval., 4 (02), 293–302. http://dx.doi.org/10.2118/12777-PA.
Daneshy, A. A., 2005. Pressure Variations inside the Hydraulic Fracture and Its Impact on Fracture Propagation, Conductivity, and Screen-out. Presented at SPE Annual Technical Conference and Exhibition. https://doi.org/10.2118/95355-MS.
Dastkhan, Z.., 2015. Minimization and Removal of Wellbore Storage Effect by Direct Deconvolution of Well Test Data. Proceedings of SPE Reservoir Characterization and Simulation Conference and Exhibition. http://dx.doi.org/10.2118/175595-MS.
Duong, A.N., 1989. A New Set of Type Curves for Well-Test Interpretation with the Pressure/Pressure-Derivative Ratio. SPE Form. Eval., 4 (02), 264–272. http://dx.doi.org/10.2118/16812-PA.
Duong, A.N., McLauchlin, L.A., 1989. A Generalized Approach for Analyzing the Early-Time Pressure Transient Data. Presented at SPE Production Operations Symposium. http://dx.doi.org/10.2118/18880-MS.
Gonzalez Chavez M A, Cinco-Ley H., 2006. Effect of pressure in a well with a vertical fracture with variable conductivity and skin fracture. Presented at International Oil Conference and Exhibition in Mexico. https://doi.org/10.2118/104004-MS
Gringarten, A.., 1979. A Comparison between Different Skin and Wellbore Storage Type-Curves for Early-Time Transient Analysis. Proceedings of SPE Annual Technical Conference and Exhibition. http://dx.doi.org/10.2523/8205-MS.
Lee, S.-T., Brockenbrough, J.R., 1986. A New Approximate Analytic Solution for Finite-Conductivity Vertical Fractures. SPE Form. Eval., 1 (01), 75–88. http://dx.doi.org/10.2118/12013-PA.
Levitan, M.M., Crawford, G.E., Hardwick, A., 2006. Practical Considerations for Pressure-Rate Deconvolution of Well Test Data. SPE J., 11 (01), 35–47. http://dx.doi.org/10.2118/90680-PA.
Lolon E P, McVay D A, Schubarth S K., 2003. Effect of fracture conductivity on effective fracture length. Presented at SPE Annual Technical Conference and Exhibition. https://doi.org/10.2118/84311-MS.
Luo, W., and Tang, C., 2015. A semianalytical solution of a vertical fractured well with varying conductivity under non-darcy-flow condition. SPE J. 20 (05), 1028–1040. https://doi.org/10.2118/178423-PA.
McKinley, R.M., 1971. Wellbore Transmissibility from Afterflow-Dominated Pressure Buildup Data. J. Pet. Technol., 23(07), 863–872. http://dx.doi.org/10.2118/2416-PA.
Miller, C. C., Dyes, A. B., Hutchinson Jr, C. A., 1950. The estimation of permeability and reservoir pressure from bottom hole pressure build-up characteristics. J. Pet. Technol., 2(04), 91–104. https://doi.org/10.2118/950091-G.
Mirzaei, M., and Cipolla, C. L., 2012. A workflow for modeling and simulation of hydraulic fractures in unconventional gas reservoirs. Presented at SPE Middle East Unconventional Gas Conference and Exhibition. https://doi.org/10.2118/153022-MS.
Onur, M., Peres, A.M.M., Reynolds, A.C., 1989. New Pressure Functions for Well Test Analysis. Presented at SPE Annual Technical Conference and Exhibition. http://dx.doi.org/10.2118/19819-MS.
Onur, M., Reynolds, A.C., 1988. A New Approach for Constructing Derivative Type Curves for Well Test Analysis. SPE Form. Eval., 3(01), 197–206. http://dx.doi.org/10.2118/16473-PA.
Onur, M., Yeh, N., Reynolds, A.C., 1989. New Applications of the Pressure Derivative in Well-Test Analysis. SPE Form. Eval., 4(03), 429–437. http://dx.doi.org/10.2118/16810-PA.
Ramey, H.J., 1970. Short-Time Well Test Data Interpretation in the Presence of Skin Effect and Wellbore Storage. J. Pet. Technol., 22(01), 97–104. http://dx.doi.org/10.2118/2336-PA.
Soliman, M. Y., 1986. Design and analysis of a fracture with changing conductivity. J. Can. Pet. Technol. 25 (05), 62–67. https://doi.org/10.2118/86-05-08.
Wong, D.W., Harrington, A.G., Cinco-Ley, H., 1986. Application of the Pressure Derivative Function in the Pressure Transient Testing of Fractured Wells. SPE Form. Eval., 1(05), 470–480. http://dx.doi.org/10.2118/13056-PA.