Diagenesis and Fluid Flow Variability of Structural Heterogeneity Units in Tight Sandstone Carrier Beds of Dibei, Eastern Kuqa Depression

Figure 4

Overview section of a gas leg (4931–4941 m) in Ahe Formation of well DB102 and the GR, SP, FMI, and ECS loggings showing that there are two distributary channels in a fining-up cycle, which can be divided into carbonate-cemented (blue), muddy sandstone (green), fine-grained (gray), and three sandy sandstone layers (orange).