“…A number of studies describing mudstone and shale compaction have been published over the past 80 years (Rubey, 1927;Jones, 1944;Skempton, 1944;Ham, 1966;Magara, 1968;Skempton, 1970;Baldwin, 1971;Durmishyan, 1974;Magara, 1980;Larsen and Chilingar, 1983;Dzevanshir et al, 1986;Bayer and Wetzel, 1989;Issler, 1992;Karig and Hou, 1992;Aplin et al, 1995;Vasseur et al, 1995;Hansen, 1996;Velde, 1996;Pouya et al, 1998;Yang and Aplin, 1998;Nygard et al, 2004;Aplin and Larter, 2005;Aplin et al, 2006). A variety of empirical relationships has been proposed to express the compaction behavior of mudstones and shales as a function of increasing stress or depth of burial (Terzaghi, 1925;Athy, 1930;Hedberg, 1936;Dickinson, 1953;Rubey and Hubbert, 1959;Weller, 1959;Chilingar and Knight, 1960;Hamilton, 1976b;Baldwin and Butler, 1985;Burland, 1990;Goulty, 1998;Yang and Aplin, 2004).…”