Abstract
For the purpose of understanding fluid flow regime in the focal area, the permeability structure and porosity distribution are critical factors. The effects of burial and subsequent uplifting on surface samples are evaluated by effective pressure cycling tests, and we propose a method to estimate permeability at depths. Permeability at Ashigara basin generally decreased with depth, and estimated permeability-depth relationship was plotted as log-linear curve, and that porosity-permeability relationship is described as a power law. Drastic permeability and porosity reduction with burial depths might be due to chemical cementation and time-dependent compaction rather than mechanical compaction.
