Modeling of subsidence in south Pars as field using analytical and semi analytical methods

Document Type : Original Article

Authors

1 Prof. of Engineering Geology Kharazmi University

2 Associate professor, Department of Geology, Esfahan University, Esfahan, Iran

3 Ph.D. student of Engineering Geology, Department of Geology, Kharazmi University, Tehran, Iran.

Abstract

Exploitation of hydrocarbon reservoir would cause decrease in pore pressure and increase of effective stress applied to reservoir rock, which result in compaction of reservoir. If the reservoir compaction exceeds certain limit, the overburden rocks of reservoir due to their weights begin to subside. With respect to the importance of South Pars gas field which belongs to Iran and Qatar, calculation and modeling of field surface subsidence is very important. In this paper for determination of South Pars Gas field subsidence, at first, the reservoir compaction with use uniaxial compaction theory was calculated and then the effect of this compaction on the field surface with use analytical and semi analytical method was modeled. The amount of South Pars reservoir compaction at the end of production period reached up to 0.5 meter and according to the results of two subsidence modeling methods, maximum subsidence value will reach to over 0.6 meter.  

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Main Subjects

References

Atefi Monfared, K., 2009. Monitoring Oil Reservoir Deformations by Measuring Ground Surface Movements, Civil Engineering. University of Waterloo, Ontario, Canada, p. 256.
Detournay, E., Cheng, A.H.-D., 1993. Fundamentals of Poroelasticity1.
Fjær, E., Holt, R., Horsrud, P., Raaen, A., Risnes, R., 2008. Petroleum Related Rock Mechanics. Elsevier Science Publishers B.V., Amsterdam.
Fokker, P., Orlic, B., 2006. Semi-analytic modelling of subsidence. Mathematical Geology 38, 565-589.
Fredrich, J.T., Arguello, J., Deitrick, G., Rouffignac, E.d., 2000. Geomechanical modeling of reservoir compaction, surface subsidence, and casing damage at the Belridge diatomite field. SPE Reservoir Evaluation & Engineering 3, 348-359.
Geertsma, J, 1973. Land subsidence above compacting oil and gas reservoirs. JPT 59 734-744.
Gurevich, A.E, Chilingarian, G.V, 1995. Chapter 4 Possible impact of subsidence on gas leakage to the surface from subsurface oil and gas reservoirs, in: G.V. Chilingarian, E.C.D., Yen, T.F. (Eds.), Developments in Petroleum Science. Elsevier, pp. 193-213.
Hermansen, H., Landa, G.H., Sylte, J.E., Thomas, L.K., 2000. Experiences after 10 years of waterflooding the Ekofisk Field, Norway. Journal of Petroleum Science and Engineering 26, 11-18.
Ketelaar, V.B.H., 2009. Satellite radar interferometry. Springer.
Kosloff, D., Scott, R.F., Scranton, J., 1980. Finite element simulation of Wilmington oil field subsidence: I. Linear modelling. Tectonophysics 65, 339-368.
Marte, G., Lloyd, T., Harald, H., Axel, M., Nick, B., Landa, G., 1994. Modelling of the compaction behaviour of fractured chalk. Rock Mechanics in Petroleum Engineering.
McCann, G.D., Wilts, C.H., 1951. A mathematical analysis of the subsidence in the Long Beach-San Pedro Area. California Institute of Technology.
Nagel, N., 2001. Compaction and subsidence issues within the petroleum industry: From Wilmington to Ekofisk and beyond. Physics and Chemistry of the Earth, Part A: Solid Earth and Geodesy 26, 3-14.
Poland, J.F., Lofgren, B.E., Riley, F.S., 1972. Glossary of Selected Terms Useful in Studies of the Mechanics of Aquifer Systems and Land Subsidence Due to Fluid Withdrawal. U.S. Geological Survey, USGS, Wash., D.C.
Schoustra, S.S., 2004 Bodemdaling Groningen, Analyse van de waterpassingen 1964-2003, Nederlandse Aardolie Maatschappij B.V.
Settari, A., 2002. Reservoir compaction. JPT 54, 62-69.
Sroka, A., Hejmanowski, R., 2006. Subsidence prediction caused by the oil and gas development., 3rd IAG Symposium on Geodesy for Geotechnical and Structural Engineering and12th FIG Symposium on Deformation Measurements, Baden, Austria, p. 8.
Sulak, R.M., 1991. Ekofisk field: the first twenty years. JPT 43 1265-1271.
Wolberg, J., 2005. Data analysis using the method of least squares: extracting the most information from experiments. Springer.
Zeitoun, D.G., Wakshal, E., 2013. Land Subsidence Analysis in Urban Areas: The Bangkok Metropolitan Area Case Study. Springer London, Limited.
Scientific Quarterly Journal of Iranian Association of Engineering Geology
Volume 6, Number 3 & 4
March 2013
Pages 47-58

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History

  • Receive Date: 21 February 2013
  • Revise Date: 19 June 2013
  • Accept Date: 25 December 2013

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