Measurements of pore shapes from Scanning Electron Microscope (SEM) images for three sandstone samples (the Navajo Sandstone, the Weber Sandstone, and the Kayenta Sandstone) are compared to the aspect ratio spectra obtained from inverting laboratory velocity versus pressure data using the method of Cheng and Toksiiz (1979). The results indicate that the inversion method is in very good agreemen...

Current research on diagenesis and its evolution focuses mainly sandstone reservoirs. Conventional oil gas reservoir observation techniques for characterizing shale reservoirs are limited, comprehensive nanoscale pore variations, of reservoirs, especially immature low-maturity marine is relatively scarce. To reveal the shale, geochemical mineral analyses, quantitative characterization structure...

The parameters of grain size, contents silica, kaolinite, hydromica, calcite, and a geological time tight sandstone reservoirs in Upper Paleozoic Ordos basin were researched thoroughly, the impact diagenetic evolution process different types on porosity throats was analyzed, based quantitative statistics from thin sections, measurements permeability, conventional constant-rate mercury injection...

Small-scale probe permeability measurements on differently oriented faces of highly compacted and quartz-cemented Viking Formation sandstones yield detailed permeability distributions that appear to be diagnostic of the grainand lamina-scale fabric of the samples. Permeability anisotropy of a single ‘structureless'-appearing sample is low, reflected by a kV / kH-ratio of 0.7; corresponding k-di...

Rocks and fossils do not come with labels informing us of their age. They must be understood in light of their geologic context, and interpreted within a worldview. Unfortunately, my evolutionary colleagues are often so dominated by uniformitarian brainwashing they can't objectively understand young-Earth evidence. Nevertheless, some of the evidence is clear and open for all to see. One such cl...

The objective of this study was to establish a rock physics model of North Sea Paleogene greensand. The Hertz-Mindlin contact model is widely used to calculate elastic velocities of sandstone as well as to calculate the initial sand-pack modulus of the soft-sand, stiff-sand, and intermediate-stiff-sand models. When mixed minerals in rock are quite different, e.g., mixtures of quartz and glaucon...

Mercury intrusion porosimetry (MIP) measurements are widely used to determine pore throat size distribution (PSD) curves of porous materials. The pore throat size of porous materials has been used to estimate their compressive strength and air permeability. However, the effect of sample size on the determined PSD curves is often overlooked. In pursuit of a better understanding of the effect of ...

Aeolian processes have shaped and contributed to the geological record in Gale crater, Mars, long after fluviolacustrine system existed ?3 Ga ago. Understanding these aeolian deposits, particularly those which been lithified show evidence for aqueous alteration, can help constrain environment at their time of deposition role liquid water later Mars' history. The NASA Curiosity rover investigate...

the sorkheh deposit in northwestern iran exhibits several readily visible general characteristics of sediment-hosted stratiform copper (ssc) mineralization. it consists of fine-grained disseminated base-metal sulfides within gray sandstones (gray beds, the basal whitish miocene sandstone and shallow-water) that overlie a thick sequence of red beds (miocene upper red formation). the host gray be...