This study performs a comprehensive comparison of three key marine shale reservoirs in the southeastern margin of the Sichuan Basin, and explains why commercial gas production was only achieved in the Lower Silurian Longmaxi (LSL) and Upper Ordovician Wufeng (UOW) formations, but not in the Lower Cambrian Niutitang (LCN) formation. The experimental methods included in situ gas content and gas c...

To clarify the implication of alkane carbon and hydrogen isotopes for genesis accumulation over-mature shale gas, we carried out a comparative study on Longmaxi gases from eight blocks in Upper Yangtze area. The results show that δ 13 C CH4 , C2H6 C3H8 gas are all positively correlated with Ro. According to distribution model thermal maturity, lies reversal stage. Shale is mixture kerogen crack...

Understanding methane adsorption behavior on deep shales is crucial for estimating the original gas in place and enhancing recovery shale formations. In this study, within lower Silurian Longmaxi formation from Sichuan Basin, South China was conducted at pressures up to 50 MPa. The effects of total organic carbon (TOC), temperatures, clay minerals, moisture content capacity were discussed. resu...

This study investigates the provenance and tectonic background of lower Silurian Longmaxi Formation black shale Yanyuan Basin in western Kangdian ancient land provides guidance for gas exploration development area. The mineral petrological geochemical characteristics this area have been studied detail. is mainly a passive continental margin environment, but also has attributes an active island ...

Shale is a crucial natural gas resource, attracting global exploration and development interest. China has abundant shale resources that will drive future oil advances by increasing reserves production. The WY field the most productive greatest potential for development. This study analyzed high-quality logging response characteristics drilling logging, seismic, analytical test data in area to ...

Organic-rich shales were found in the Ordovician to Silurian Wufeng-Longmaxi Formation northwestern Guizhou province, China, which has high shale gas content revealed by field measurement. Shale occurrence, free gas/sorbed ratio, and their influencing factors are crucial for exploitation strategy. Results indicated that dominated type I kerogen, with total organic carbon (TOC) equivalent vitrin...