Coupled CFD–DEM numerical modelling of perforation damage and sand production in weak sandstone formation

Furkhat Khamitov, Nguyen Hop Minh, Yong Zhao

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A coupled microscopic simulation method was implemented to investigate the bond breakage behaviour during perforation and sand production in a weak cemented sandstone. A new contact bond model was implemented in the open-source program CFDEM to simulate a large cylindrical sample of one hundred thousand numerical particles using a high-performance computer (HPC) system. The coupled simulation of the particle–fluid phases and the information exchange between them required intensive computational power and highly efficient parallelization algorithms, yet it provided the detailed information on the distribution of bond and bond breakage, new contact formation, particle migration and the associated change in the internal porosity across the sample. The perforation process was found to create a damage zone that contained a compacted core of unbonded particles. The compacted core expanded quickly under fluid flow condition and released its particles to migrate towards the perforation tunnel. Small particles were produced first from the perforation damage zone, while fewer particles of larger sizes were produced later in an overall transient sand production phenomenon.

Original languageEnglish
Article number100255
JournalGeomechanics for Energy and the Environment
Volume28
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • Cement
  • CFD–DEM
  • DEM
  • Elastic
  • Plastic
  • Sand production

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Geotechnical Engineering and Engineering Geology
  • Computers in Earth Sciences

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