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...
Previous studies on thermal induced damage of rocks concentrated mainly on the analysis of macro-mechanical properties. This paper documents physical and microstructural characteristics of sandstone after high-temperature treatment by using several testing methods at the micro scale. Results indicate that ph...
The Effect of Oil Emplacement on Diagenetic Clay Mineralogy: the Upper Jurassic Magnus Sandstone Member, North Sea The Upper Jurassic Magnus turbidite sandstone has higher illite/(illite + kaolin) and K2O/(K2O + Al2O3) ratios in the oil zone than in the water zone. Both... RH Worden,SA...
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 ...
N. (1971): Distribution of gold in the granitoids of the Verkh Iset massif in the Urals. Geochemistry International 8, 924 (abstr. only). [Au]. Google Scholar Butler, J. R. (1953): The geochemistry and mineralogy of rock weathering (1) The Lizard area, Cornwall. GCA 4, 157–178...
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 ...
样品δEu=0.45~0.75,平均0.57,具明显负Eu异常。 表1.白云山锡林柯博组砂岩主量、微量和稀土元素分析数据 Table 1.Major, trace and rare earth element content of sandstone from Xilinkebo Formation in Baiyunshan area
properties of sandstone were significantly reduced by freeze–thaw effect. Sandstone’ peak strength and elastic modulus were 7.28–37.96% and 6.38–40.87% less than for the control, respectively. The proportion of super-large pore and large pore in sandstone increased by 19.53–81.19%. We ...
[257] demonstrated TEM's capability to analyze soil materials at the nano level, providing critical insights into soil chemistry and mineralogy that influence its physical properties. Another paper performed by [258] studied cementitious materials using TEM. Studies such as [244,259] utilized TEM ...
This comprehensive study can provide theoretical guidance for the exploration of tight sandstone reservoirs. 2. Geological setting The Ordos Basin is located in Central China and developed in a vast craton (Fig. 1a), resulting in the stable central part's formation and weak internal structure ...