Physics-based reconstruction of sedimentary rocks

Guodong Jin, Tadeusz Patzek, Dmitry B. Silin

Research output: Contribution to journalConference articlepeer-review

16 Scopus citations

Abstract

We develop a depositional model that reconstructs numerically the geometrical structure and mechanical properties of natural sedimentary rocks in two and three dimensions. Our emphasis is on unconsolidated sands and sandstones. Our model has the following distinctive features: (1) it accounts for the dynamic geologic processes of grain sedimentation and compaction, and the diagenetic rock transformations; and (2) it reproduces the mechanical rock properties. The main input parameters are the grain size distribution, the final rock porosity, the type and amount of cement and clay minerals, the coefficient of friction, the bond strength parameters, and the grain stiffness moduli. The initial grain shapes are circular in 2D and spherical in 3D. Our depositional model can also be used to study the initiation, growth, and coalescence of micro-cracks in the rock. The proposed approach makes it possible to model the accumulation of rock damage and fracture propagation. The development of micro-cracks in, for example, a 2D marble rock model is studied under increasing vertical stress. Both the box fractal dimension of the micro-crack distribution and its variation with the applied stress are estimated.

Original languageEnglish (US)
Pages (from-to)307-320
Number of pages14
JournalSPE Western Regional/AAPG Pacific Section Joint Meeting
StatePublished - Dec 1 2003
EventSPE Western Regional/AAPG Pacific Section Joint Meeting - Long Beach, CA, United States
Duration: May 19 2003May 24 2003

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Engineering(all)

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