Download Fractured porous media by Pierre M Adler; Jean-François Thovert; Valeri V Mourzenko PDF

By Pierre M Adler; Jean-François Thovert; Valeri V Mourzenko

This ebook offers a scientific remedy of the geometrical and delivery houses of fractures, fracture networks, and fractured porous media.

It is split into significant components. the 1st half offers with geometry of person fractures and of fracture networks. using the dimensionless density rationalizes the consequences for the percolation threshold of the networks. It offers the an important good thing about grouping the numerical info for numerous fracture shapes.

The moment half offers generally with permeability less than regular stipulations of fractures, fracture networks, and fractured porous media. back the implications for numerous different types of networks should be rationalized via the dimensionless density. A bankruptcy is devoted to 2 part circulation in fractured porous media

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Example text

2. On the meter scale, a block of dark grey Hercynian granite (about 52 × 35 × 36 cm3 ) was analyzed in detail by Led´esert et al. (1993). Trace maps were drawn from nine sections of the block and one of them is displayed in Fig. 2a. The fracture pattern appeared to be composed of two main families A and B, at about ±30◦ inclination angle from the vertical axis. A three-dimensional representation of the whole network was shown in Fig. 3. It is also seen that the traces are not perfectly straight, indicating that the corresponding fractures are not plane.

16b in dimensional terms for various I2 OUD shapes. e. 1. An exponent equal to or greater than 4 can be rationalized by considering the fact that the formation of a polyhedron requires the intersection of at least four fractures. However, the lines in Fig. 7% in the investigated range. Note that the data in Fig. 16 were obtained recently with much larger sample sizes than in Huseby et al. (1997) which explains the differences in the results. 5. 5 Concluding remarks It has been shown in the previous examples that ρ is a crucial quantity whose knowledge is a key to basic properties of fracture networks.

5. 5 Concluding remarks It has been shown in the previous examples that ρ is a crucial quantity whose knowledge is a key to basic properties of fracture networks. 48 The geometry of fracture networks Therefore, the next question is how to extract this information from field measurements. 1, fractures are only visible on outcrops and measurements can be performed along lines or over surfaces. It is the purpose of the next two sections to show how such information can be derived by elementary means.

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