Many oil companies, such as Benton Oilfield in the United States and Daqing Oilfield in China, have carried out on-site trials of composite flooding technologies for some old oilfields, which has increased the crude oil output and obtained higher crude oil recovery (Shutang and Qiang, 2010; ...
When the paleoenvironment change to cold-humid during the same 30–57 yr cycle Ⅲ, a short-term lake-level rise occurred, which interrupted SSFL deposition and increased the reducibility of water column (Fig. 10, 13A–B). Meanwhile, a rapid increase in rainfall promoted the input of ...