Abstract
In this chapter, definitions of important pore pressure-related terms are presented first. This is followed by a discussion on overpressure-generating mechanisms and overpressure estimation methods. The chapter presents the relationships between pore pressure distribution and tectonic elements in sedimentary basins. These relationships were observed in a recent study that was conducted on the potential gas shale formations in the Perth Basin, Western Australia. This study demonstrated that there was a combination of mechanisms contributing to overpressure development driven by the complicated basin geology. Well log and mud log data were the base of this study. The chapter stresses the importance of tectonic activities on pore pressure distribution in shale formations. The overpressure phenomenon is frequently detected in low permeability zones such as shale formations as shale tends to retain overpressure more when compared to other types of rocks. Finally, the chapter explains the origins of overpressure in shale intervals.
Original language | English |
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Title of host publication | Fundamentals of Gas Shale Reservoirs |
Publisher | wiley |
Pages | 139-167 |
Number of pages | 29 |
ISBN (Electronic) | 9781119039228 |
ISBN (Print) | 9781118645796 |
DOIs | |
Publication status | Published - 6 Jul 2015 |
Externally published | Yes |
Keywords
- Mud log data
- Overpressure-generating mechanisms
- Perth basin
- Pore pressure prediction
- Shale formations
- Shale intervals
- Tectonic elements
- Well log data