The St Formation sandstones contain dominantly very fine-to medium-grained quartz arenites with occasional coarse-grained sandstone layers. Feldspathic and quartz wackes are also present. The effect of compaction and exhumation on reservoir properties (porosity and permeability) and seismic property (P...
The tests were performed using sandstone cores with two different permeability categories (low and high permeabilities) as the filtration media. This gave the full picture of perlite performance as implemented for different formation properties and considering the drilling fluid properties. The formed ...
Temperature dependent thermophysical properties of Sander sandstone are presented in dry and saturated states over a temperature range of −20 °C–40 °C. Water and ethanol are used as saturating fluids. Anomalous changes in thermophysical properties due to the formation of ice during freezing–tha...
The contact part between shaft wall and rock is affected by many factors, such as temperature and formation pressure, in the commonly used freezing method in coal mine development through quicksand and water-rich strata. To confine the relationships between these factors and the compressive strength...
To reveal the mechanical properties of rocks under stress disturbance and unloading confining pressure, conventional triaxial compression tests, triaxial compression tests on unloading damaged sandstone, and cyclic loading and unloading tests on unloadin
Water-rock chemical interactions may also be important. These effects are illustrated by a discussion of the electrical properties of basalt and sandstone. Extensive tables of results for the room temperature electrical properties of minerals, chemical compounds and rocks are given. The temperature ...
[19] investigated the effects of confining pressures on the mechanical properties of sandstone and granite under high temperature, respectively, and found that the rock strength typically increases with the increase of confining pressure, while the brittleness gradually decreases, and the sample failure ...
The sandstone formation is classified into three litho-units on the basis of texture and mineralogy. The units are gradational. This paper focuses on documentation of petrographic and depositional controls on reservoir properties. In the Kuzgun Formation, diagenetic processes active during the burial ...
The average compressive strength of SLS specimens was 3.88±0.32MPa and average tensile strength was 0.49±0.05MPa; the PIB specimens offered average compressive strength of about 9.82±0.16MPa and average tensile strength 0.85±0.06MPa, similar to sandstone specimens. PIB specimens printed vertical to...
sandstone, with fine to medium grain having 89.2% sand and 10.8% mud, = 10–12.8%, k = 12.2 md; thickness from 2–3 m; (vi) bioturbated sandstone, having silty sand to fine-grained sand with 72–86% sand and 28–14% mud, = 2.4–6.8%, k = 5.2 md; the sandstone thickness ...