Multivariate Statistical Analysis Reveals the Heterogeneity of Lacustrine Tight Oil Accumulation in the Middle Permian Jimusar Sag, Junggar Basin, NW China

Figure 7

Plots of terpane parameters [17]. (a) C₂₁–C₂₄ TT (tricyclic terpane) plot used to identify the depositional environment. (b) C₂₄Tet/C₂₆TT–C₁₉/C₂₃TT plot used to identify the organic matter inputs. (c) Gammacerane index plot used to infer the water salinity. (d) C₂₀/C₂₁TT–C₂₁/C₂₃TT plot used to identify the organic matter input.

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