The methane sorption capacity of Paleozoic shales from the Sichuan Basin, China

Fractal Characteristics of Shales Across a Maturation Gradient

“…A plot of fractal dimension over TOC content (Fig. 1A) suggests a trough-shaped response of fractal dimension in contrast to Yang et al's (2014) finding of a linear correlation; the shale samples in the latter study are of higher maturity (R o 3.0-5.0%, Wang et al, 2013) and narrower ranges of TOC (0.16-9.15 wt. %) and feldspar contents (6.9-28 wt.…”

The composition and its impact on the methane sorption of lacustrine shales from the Upper Triassic Yanchang Formation, Ordos Basin, China

“…Four Chang 9 shales, with comparable TOC values (2e10%) varied less (1.5e2.2 cm 3 /g, Table 1). There have been numerous reports on the methane sorption capacity of gas shales worldwide Bustin, 2007a, 2008a;Chen et al, 2011;Gasparik et al, 2012Gasparik et al, , 2014Lu et al, 1995;Bustin, 2007, 2009;Wang et al, 2013;Zhang et al, 2012). The temperature at which measurements were made greatly influenced methane sorption capacity; therefore, four immature to over-mature gas shales for which methane sorption was determined at 50 C on a dried basis , as in the present work, were selected for comparison.…”

“…About 15 g of rock powder sample or 5 g of kerogen were analyzed for their methane sorption isotherms using the procedure reported by Wang et al (2013), using a Sieverts PCT-Pro E&E gas sorption/desorption instrument (HY Energy Company Ltd.). Before analysis, bulk samples finer than 80 mesh were dried in an oven at 60 C for 24 h. The working pressure of the gas reservoir was set in the range 0e12 MPa.…”

“…In the past few years, Chinese geologists have shown increasing interest in the composition and gas potential of shales (Chen et al, 2011;Han et al, 2013;Wang et al, 2013), and shale gas was licensed as a new type of mineral resource by the Chinese Government in 2011 to accelerate the exploration of shale gas. The reported results from China have exclusively focused on the very old marine shales from South China, e.g.…”

Quantitative characterization of micropore structure for organic-rich Lower Silurian shale in the Upper Yangtze Platform, South China: Implications for shale gas adsorption capacity

“…In addition to quartz, clay mineral is also the major mineral in the shale samples with a percentage of 24.1-51.2%. The clay mineral composition generally reflects the diagenetic evolution and depositional environments and they are important to the study of methane sorption and gas content of the shale (Wang et al, 2013). Feldspar is in significant quantity in the shale samples with a range of 2.8-15.3%.…”