...-Kuroshima drilling sites in Shikoku Island, southwest Japan. As a preliminary result, the stress orientations determined by the ASR method were reported and compared with the hydraulic fracturing results. The three-dimensional principal stress orientation by the ASR method showed that stress regime...

... ABSTRACT: To determine three-dimensional stress orientation, we carried anelastic strain recovery (ASR) measurements out using drill core samples taken from a scientific ocean deep drilling project. The lithology of the core samples is mudstone or siltstone with larger porosities ranged from...

... 30 10 REVision 2 69.3 277 70 43.8 124 18 50.3 31 8 more accurate determination of the stress orientation can be obtained by applying multiple regression anal- ysis of the stress, based on the numerical simulation method. Strictly speaking, these initial values, as listed in Table 1 REG, are derived...

..., Zoback 1992, Hillis & Reynolds 2000, Tingay et al. 2010). 3 RESULTS 3.1 In situ stress orientations Figure 1 shows the directions of the maximum hor- izontal stress (SHmax). Overall, the SHmax directions are predominantly ENE-WSW or NE-SW. The SHmax direction is consistent with that estimated using other...

... slope.At the same time,the maximum horizontal principal stress orienta- tion of Table 1 reflects the F1 fault s impact on the stress orientation to a certain extent. Specifically for, the principal stress direction in the right bank is essen- tially perpendicular to the faults and consistent with 414...

... and minimal stress variation with depth. After the removal of gravitational effects from in-situ stress, we analyzed the statistical characteristics of stress variation with depth and tectonic stress orientations in the sub-regions. The results of our study may bear great referential implication...

... Characterization Directional Drilling log analysis Upstream Oil & Gas Completion Method marine in-situ stress maximum horizontal ne sichuan drawdown pressure rock mechanical parameter stress orientation horizontal principal stress maximum horizontal principal stress drilling operation orientation...

... Amadei Reservoir Characterization Rock stress stress model zang stress field stress orientation rock mass Magnitude principal stress Rock Stress and Earthquakes Xie (ed.) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-60165-8 How to generate the Final Rock Stress Model (FRSM...