Hu WANG, Rui LIU, Aizhong YUE, Huawei YU, Xiaolei ZHANG, Zhengchun YANG, Qian ZHU, Zhiqiang GUO. Depth-of-investigation characteristics and influence of 350-kV high-voltage X-ray density logging[J]. NUCLEAR TECHNIQUES, 2023, 46(10): 100502
- NUCLEAR TECHNIQUES
- Vol. 46, Issue 10, 100502 (2023)
Fig. 1. Simple intention of X-ray scattering in formation
Fig. 2. Diagram of model of the density logging instrument for MCNP calculation
Fig. 3. Depth of investigation of the X-ray source
Fig. 4. Comparison of the depth of investigation of two sources for short-spacing detector (a) and long-spacing detector (b)
Fig. 5. Relationship between the depth of investigation and contribution rate (a) X-ray source, (b) 137Cs source
Fig. 6. Effect of mudcake on counting rate
Fig. 7. Contribution rate of mudcake and formation to detectors (a) 1.27 cm mudcake, (b) 2.54 cm mudcake
Fig. 8. Relationship between the thickness of mudcake and density deviation (a) 1.27 cm mudcake, (b) 2.54 cm mudcake
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