A mechanism contributing to subsidence above gas reservoirs and its application to a case study

Andrea Menin, Valentina A. Salomoni, Raffaella Santagiuliana, Luciano Simoni, Antonio Gens, Bernhard A. Schrefler

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

This paper aims to demonstrate that capillary effects and structural collapse can not be ruled out as significant factors in the development of subsidence occurring above gas fields. These phenomena provide sound explanations for continuing surface settlements when reservoir pore pressures stabilize and for additional settlements occurring even after the end of gas production. Conventional subsidence models fail to simulate this settlement behavior. Capillary effects also explain the lower rock compressibilities observed in gas-bearing strata as compared to the values obtained in the laboratory from fully saturated samples. Taking into account these aspects, the observed subsidence above a reservoir in the North Adriatic basin, Italy, is studied in detail.

Original languageEnglish (US)
Pages (from-to)270-287
Number of pages18
JournalInternational Journal for Computational Methods in Engineering Science and Mechanics
Volume9
Issue number5
DOIs
StatePublished - Sep 2008

Keywords

  • Environmental impact
  • Gas recovery
  • Plasticity
  • Ravenna Terra field
  • Subsidence
  • Suction
  • Unsaturated soils

ASJC Scopus subject areas

  • Computational Mathematics
  • Computational Mechanics

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