X-Ray Fluorescence for Laminated Silty Shale Reservoirs in Ordos Basin, China: Implications for Lithology Identification

Figure 4

Lithologic characteristics of shale layers in Chang 7, Xiasiwan area. (a) 1369.11 m black shale in Well Y1. (b) Silty laminated in Well Y1 1371.35 m, single polarized light. (c) 1362.00 m calcareous laminated in Well Y1. (d) 1370.8 m silty laminated in Well Y1. (e) 1393.87 m silty laminated in Well Y1. (f) 1393.87 m silty laminated in Well Y1, single polarized light.

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