Kerogen from the Cambrian deposits of the Kuonamka Formation (northeastern Siberian Platform)

Abstract

Kerogens from the Lower and Middle Cambrian deposits of the Kuonamka Formation in the northeastern Siberian Platform have been analyzed by modern methods. We have determined the pyrolytic characteristics of insoluble organic matter and the contents of C, H, S, N, O, and the stable C isotope. The type and catagenesis of organic matter have been estimated, as well as the generating potential of oil source rocks. It has been found that the composition of kerogens taken from the Molodo River outcrops was affected by supergene processes and that the degree of their alteration is related to the organic content of rocks and their structure.

Oil Charge History of Bitumens of Differing Maturities in Exhumed Palaeozoic Reservoir Rocks at Tianjingshan, Nw Sichuan Basin, Southern China

“…Precambrian and lower Palaeozoic black shales are present in the Sichuan and Tarim Basins (China), and in other areas including the South Oman Salt Basin, the NE Siberian Platform, the Gaspé Peninsula and Northern Poland (Zhang et al, 2000;Cai et al, 2008;Grosjean et al 2009Grosjean et al , 2012Cai et al, 2009a,b;Parfenova et al, 2010;Grundman et al, 2012). Some of these shales form excellent source rocks with high TOCs Wang et al, 2007;Grundman et al, 2012).…”

Effects of Moisture Contents on Shale Gas Recovery and CO2 Sequestration

“…Therefore, it is crucial to understand the adsorption properties of CH 4 and CO 2 in kerogen in an attempt to enhance the efficiency of shale gas recovery and CO 2 sequestration. It is also well known that shale is under moist conditions. − For example, kerogen from the Kuonamka Formation was reported to have moisture contents ranging from 0.6 to 5% . Plenty of experimental work studied the effects of moisture on pure methane adsorption and suggested that the presence of water occupies the pore volume and thus leads to a sharp decrease in the methane adsorption capacity in shale. − On the other hand, relatively few experiments focused on the influence of moisture on the competitive adsorption of CH 4 and CO 2 .…”

“…11−14 For example, kerogen from the Kuonamka Formation was reported to have moisture contents ranging from 0.6 to 5%. 11 Plenty of experimental work studied the effects of moisture on pure methane adsorption and suggested that the presence of water occupies the pore volume and thus leads to a sharp decrease in the methane adsorption capacity in shale. 14−17 On the other hand, relatively few experiments focused on the influence of moisture on the competitive adsorption of CH 4 and CO 2 .…”

Insights into the Molecular Competitive Adsorption Mechanism of CH4/CO2 in a Kerogen Matrix in the Presence of Moisture, Salinity, and Ethane

“…This section investigates the moisture effect on pure CH 4 adsorption. According to the previous reviews, kerogens from the Molodo River have a moisture content of up to 5 wt %, and kerogens from the Lower and Middle Cambrian deposits display a moisture content of 4 wt % . Thus, this work adopts the moisture content ranges from 0 to 5 wt %.…”