Samples depth(m) stratum U(ppm) Th(ppm) a b Lithology (μW/m3) (W/m.K) S1 3431.07 Es4 0.13 0.19 0.05 5.22 salt rock S2 3433.08 Es4 1.29 3.22 0.572 2.84 gypsum mudstone S3 3435.6 Es4 0.065 0.088 0.024 5.74 salt rock S4 3437.11 Es4 0.087 0.15 0.034 5.41 gypsum salt rock S5 3438.3 Es4 0.029 0.05 0.012 5.76 gypsum salt rock S6 3440.4 Es4 0.023 0.041 0.009 5.28 salt rock S7 3447.12 Es4 0.023 0.031 0.009 5.45 salt rock S8 3756.77 Es4 3.45 14.7 1.939 2.53 mudstone S9 3770.65 Es4 0.033 0.062 0.013 5.52 salt rock S10 3977.04 Es4 4.75 20.6 2.77 2.16 mudstone a: radioactive heat generation of rocks; b: thermal conductivity

Table 4: The radioactive heat generation and thermal conductivity of rocks in the Es4 from the Well Hk1 in the Dongying depression.