Abstract
A large number of deep gas reservoirs are scattered both inland and offshore in the Upper Adriatic Sea sedimentary basin. Among these gas fields, the Angela Angelina reservoir is of major concern for the CENAS project because it is directly overlain by the shoreline extending from Lido Adriano to Lido di Dante in the Ravenna area. Angela Angelina is a very complex field consisting of 47 variously shaped pools located at a burial depth ranging between 3000 and 4000 m. The 31 largest pools will be depleted by 2014 with an ultimate pressure decline that is expected to exceed 300 kg/cm2 in some pools. A numerical study of the reservoir compaction and land settlement expected over Angela Angelina is performed by a new three-dimensional nonlinear finite element model. The constitutive relationship of the most important parameter controlling the event, i.e. the vertical soil compressibility vs the effective intergranular stress, is derived from a number of oedometric tests carried out on samples cored from deep boreholes scattered throughout the Upper Adriatic Sea basin. The results predict a final maximum land subsidence due to reservoir depletion equal to 20 cm over the gas field central area and a settlement of 12รท14 cm on the coastal area directly overlying the reservoir. An approximate evaluation of the influence of the active waterdrive surrounding the gas field is also given. Field measurements of land subsidence occurred from 1977 to 1992 are shown to be sufficiently in agreement with the simulated results.
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References
AGIP (1996), Alto Adriatico. Rapporto di sintesi. Technical report, AGIP S.p.A., Milano.
Barends, F. B. J., van der Poel, J. T. and Teunissen, J. A. M. (1995), Geomechanical simulation of static and dynamic subsidence by reservoir compaction. In F.B.J. Barends et al., editors, Land Subsidence: Proceedings of the V International Symposium on Land Subsidence, A. A. Balkema, Rotterdam, 237โ245.
Bertoni, W., Brighenti, G., Gambolati, G., Ricceri, G. and Vuillermin, F. (1995), Land subsidence due to gas production in the on- off-shore matural gas fields of the Ravenna area, Italy. In F.B.J. Barends et al., editors, Land Subsidence (Proceedings of the V International Symposium on Land Subsidence, The Hague, October 1995), IAHS Publ. No.234, Wallingford, UK, 13โ20.
Biot, M. A. (1941), General theory of three-dimensional consolidation. J. Appl. Phys., 12(2), 155โ164.
Boade, R. R., Chin, L. Y. and Siemers, W. T. (1989), Forecasting of Ekofisk reservoir compaction and subsidence by numerical simulation. J. Pet. Technol., 41(7), 723โ728.
Detournay, E. and Cheng, A. H. D. (1993), Fundamentals of poroelasticity. In C. Fairhurst, editor, Comprehensive Rock Engineering: Principles, Practice & Projects, Vol. II, Analysis and Design Method, chapter 5, Pergamon Press, 113โ170.
Doornhof, D. (1992), Surface subsidence in The Netherland: the Groningen gas field. Geologie en Mijnbouw, 71, 119โ130.
Gambolati, G. (1974), Second-order theory of flow in three-dimensional deforming media. Water Resour. Res., 10(6), 1217โ1228.
Gambolati, G. (1992), Comment on โCoupling versus uncoupling in soil consolidationโ. Int. J. Numer. Anal. Methods Geom., 16(11), 833โ837.
Gambolati, G., Gatto, P. and Ricceri, G. (1984), Land subsidence due to gas-oil removal in layered anisotropic soils by a finite element model. In A.I. Johnson et al., editors, Land Subsidence (Proceedings of the III International Symposium on Land Subsidence, Venice, March 1984), IAHS Publ. No.151, 29โ41.
Gambolati, G., Sartoretto, F., Rinaldo, A. and Ricceri, G. (1987), A boundary element solution to land subsidence above 3-D gas/oil reservoirs. Int. J. Numer. Anal. Methods Geom., 11, 489โ502.
Gambolati, G., Ricceri, G., Bertoni, W., Brighenti, G. and Vuillermin, E. (1991), Mathematical simulation of the subsidence of Ravenna. Water Resour. Res., 27(11), 2899โ2918.
Gambolati, G., Putti, M. and Teatini, P. (1996), Land subsidence. In V.P. Singh, editor, Hydrology of Disasters, chapter 9, Kluwer Academic P.C., Dordrecht, 231โ268.
Gambolati, G., Putti, M. and Teatini, P. (1996), Coupled and uncoupled poroelastic solutions to land subsidence due to groundwater withdrawal. In Y.K. Lin and T.C. Su, editors, Engineering Mechanics (Proceedings of the 11th Conference), ASCE, New York, 483โ486.
Gambolati, G., Teatini, P. and Bertoni, W. (1997), Numerical prediction of land subsidence over Dosso degli Angeli gas field, Ravenna, Italy. In J. Borchers and C.D. Elifrits, editors, Current Research and Case Studies of Land Subsidence (Proc. J.F. Poland Symposium on Land Subsidence, Sacramento (CA), October 1995), Star Publ. Co., Belmonton (California). In press.
Gambolati, G. and Teatini, P. (1998), Numerical analysis of land subsidence due to natural compaction of the Upper Adriatic Sea basin. This book.
Gambolati, G., Teatini, P. and Tomasi, L. (1998), Stress-strain analysis in productive gas/oil reservoirs. Int. J. Numer. Analytic. Methods Geomech.. In press.
Geertsma, J. (1966), Problems of rock mechanics in petroleum production engineering. In Proc. 1st Cong. Int. Soc. Rock Mechan., Lisbon, 585โ594.
Geertsma, J. (1973), Land subsidence above compacting oil and gas reservoir. J. Pet. Technol., 25, 734โ744.
Geertsma, J. and Van Opstal, G. (1973), A numerical technique for predicting subsidence above compacting reservoirs, based on the nucleus of strain concept. Ver. Con. Ned. Geol. Mij. Gen., 28, 63โ78.
Gonella, M., Gambolati, G., Giunta, G., Putti, M. and Teatini, P. (1998), Prediction of land subsidence due to groundwater withdrawal along the Emilia-Romagna coast. This book.
Kosloff, D., Scott, R. F. and Scranton, J. (1980), Finite element simulation of Wilmington oil field subsidence: II. Nonlinear modelling. Tectonophysics, 70, 159โ183.
Lewis, R. W. and Schrefler, B. A. (1987), The Finite Element Method in the Deformation and Consolidation of Porous Media. J. Wiley, New York.
Marsala, A. F., Ragazzini, G., Meazza, O., Brignoli, M. and Santarelli, F. J. (1994), Basin scale rock mechanics: logs and core measurements. In EUROCKโ94, Rock Mechanics for Petroleum Engineering, A. A. Balkema, Rotterdam, 329โ336.
NAM (1995), Subsidence caused by natural gas production. Report 27600, Nederlandse Aardolie Maatschappij, Assen, Netherlands, 26 pp.
van Hasselt, J. P. (1992), Reservoir compaction and surface subsidence resulting from oil and gas production. Geologie en Mijnbouw, 71, 107โ118.
Tomasi, L. (1995), Studio con metodo non lineare agli elementi finiti della subsidenza causata da estrazione di gas. M.Sc. thesis, University of Padova, 118 pp.
Verruijt, A. (1969), Elastic storage of aquifers. In R.J.M. De Wiest, editor, Flow Through Porous Media, Academic Press, New York, 331โ376.
Zienkiewicz, O. C. and Taylor, R. L. (1989), The finite element method, volume 1. McGraw Hill, 4th ed.
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Teatini, P., Gambolati, G., Tomasi, L., Putti, M. (1998). Simulation of Land Subsidence Due to Gas Production at Ravenna Coastline. In: Gambolati, G. (eds) CENAS. Water Science and Technology Library, vol 28. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5147-4_6
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DOI: https://doi.org/10.1007/978-94-011-5147-4_6
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