Computer Science
Scientific paper
Jan 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006e%26psl.241..454o&link_type=abstract
Earth and Planetary Science Letters, Volume 241, Issue 3-4, p. 454-465.
Computer Science
Scientific paper
An understanding of fluid flow through natural fractures in rocks is important in many areas, such as in the hydrocarbon and water industries, and in the safe design of disposal sites for domestic, industrial and nuclear waste. It is often impractical to obtain this information by field or laboratory scale measurements, so numerical modelling of fluid flow must be carried out using synthetic fractures with rough fracture surfaces that are representative of the natural rock fractures. Clearly there are two practical requirements; (i) the development of a method for analysing natural rock fractures to obtain their characteristic parameters, and (ii) the development of techniques for creating high quality synthetic fractures using these parameters. We have implemented these practical requirements in two new software packages. The first, ParaFrac allows the analysis and parameterisation of fracture surfaces and apertures. The second, SynFrac, enables the numerical synthesis of fracture surfaces and apertures with basic prescribed parameters. Synthetic fractures are created using, (i) a new model, which takes full account of the complex matching properties of fracture surfaces using two new parameters, a minimum matching fraction and a transition length and (ii) an improved method of partially correlated random number generation. This model more closely captures the often complex matching properties of real rock fractures than previous more simplified models.
Glover Paul W. J.
Isakov Evgeny
Ogilvie Steven R.
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