Orbital cycles control Jurassic shale oil sweet spots in Sichuan Basin
A high resolution study of Jurassic mudstones in the Sichuan Basin in southwest China links Earth's orbital cycles to the way organic rich shale formed in a lacustrine setting, providing a framework to better predict shale oil reservoirs. Working on the Lianggaoshan Formation, the team shows how variations in orbital eccentricity control climate, lake level, sediment supply, and lithofacies, and