Late Ordovician-Early Silurian extension of the northern margin of the Upper Yangtze Platform (South China) and its impact on organic matter accumulation

Rare Earth Element Characteristics of Shales from Wufeng–Longmaxi Formations in Deep-Buried Areas of the Northern Sichuan Basin, Southern China: Implications for Provenance, Depositional Conditions, and Paleoclimate

“…The bomb was then placed in an oven at 150 °C for more than 24 h. The dissolved sample was removed and the volume was adjusted to about 2000 times the weight of the sample. The element concentrations were determined by ICP-MS. 38 The total organic carbon (TOC) content was analyzed at the Beijing Research Institute of Uranium Geology. The washed sample was ground to 80 mesh using an agate mortar, and then, 100 mg of the sample was weighed and dissolved in 5% of dilute hydrochloric acid multiple times until no bubbles were produced.…”

Geochemical Changes in the Late Ordovician to Early Silurian Interval in the Northern Margin of the Upper Yangtze Platform, Southern China: Implications for Hydrothermal Influences and Paleocean Redox Circumstances

“…The Chengkou-Wuxi area is where most of the drilling for shale gas in the WF-LMX on the northern edge of the Upper Yangtze Platform has been done. In previous studies, the stratigraphic and lithologic features and gas-bearing properties of these wells were looked at in detail. − However, there has not been a lot of studies done on the geochemical shifts that have taken place on the northern edge of the Upper Yangtze Platform and how those shifts have affected the richness of organic matter.…”

Spatiotemporal Relationship for Well-Type Selection and Layout Optimization of Surface Wells Based on the REV Permeability Model

“…China’s 14th Five-Year Plan includes CBM in its long-term energy strategic planning. Thus, achieving the depletion of mine gas is beneficial for promoting the rational allocation of energy resources and reducing the total emissions of major pollutants. − Furthermore, China has abundant coal resources and possesses the world’s third largest CBM reserves. , By the end of 2020, China’s cumulative proven CBM geological resources with a buried depth of less than 2000 m are about 30.05 × 10 12 m 3 , and the recoverable resources are 12.5 × 10 12 m 3 . , As gas utilization technology, particularly low-concentration gas utilization technology, , continues to improve and gains more traction, the rate of mine gas utilization is expected to increase. This also presents new challenges for mine gas drainage technology.…”

“…8−10 Furthermore, China has abundant coal resources and possesses the world's third largest CBM reserves. 11,12 By the end of 2020, China's cumulative proven CBM geological resources with a buried depth of less than 2000 m are about 30.05 × 10 12 m 3 , and the recoverable resources are 12.5 × 10 12 m 3 . 13,14 As gas utilization technology, particularly low-concentration gas utilization technology, 15,16 continues to improve and gains more traction, the rate of mine gas utilization is expected to increase.…”