Genesis Analysis of High-Gamma Ray Sandstone Reservoir and Its Log Evaluation Techniques: A Case Study from the Junggar Basin, Northwest China

Table 1

The tuff content, feldspar content, clay mineral content, U, Th, and ⁴⁰K in conventional sandstone reservoir, and high GR sandstone reservoir.

	Conventional sandstone reservoir	High GR sandstone reservoir
Tuff content (%)	45.35	44.93
Feldspar content (%)	22.58	24.71
Clay mineral content (%)	3.75	3.05
Th content (10^−6)	7.19	8.23
U content (10^−6)	4.47	16.08
^40K content (%)	2.58	2.56