Forward Algorithm of LWD Azimuthal Gamma

Authors

Qifeng Sun, 1.College of Computer & Communication Engineering, China University of Petroleum, Qingdao 266580, China; ;
Youxiang Duan, 1.College of Computer & Communication Engineering, China University of Petroleum, Qingdao 266580, China; ;
Yanan Yan, 1.College of Computer & Communication Engineering, China University of Petroleum, Qingdao 266580, China; ;
Hongqiang Li, 1.College of Computer & Communication Engineering, China University of Petroleum, Qingdao 266580, China; ;2.China Petrochemical Group Victory Drilling Technology Research Institute, Dongying 257000, China;

Abstract

Abstract: The study of the LWD (Logging While Drilling) azimuthal gamma imaging mode under different geological structures can provide bases for fast and accurate identification of drilled formation. The detection model of LWD azimuthal gamma is set up, and physical models of several positions of the formation and gamma detector is established, combining the descartes coordinate with the spherical coordinate, an azimuthal gamma log response algorithm under different position models is derived. Comparing the simulated results with the measured results of the azimuthal gamma ray logging tool, it is proved that the algorithm can effectively simulate the response characteristics of the azimuthal gamma, and has a high accuracy. It simulates the gamma image and analyzes the characteristics of the image, which provides a theoretical basis for real-time geosteering.

Recommended Citation

Sun, Qifeng; Duan, Youxiang; Yan, Yanan; and Li, Hongqiang (2019) "Forward Algorithm of LWD Azimuthal Gamma," Journal of System Simulation: Vol. 30: Iss. 11, Article 27.
DOI: 10.16182/j.issn1004731x.joss.201811027
Available at: https://dc-china-simulation.researchcommons.org/journal/vol30/iss11/27

First Page

4268

Revised Date

2018-06-27

DOI Link

https://doi.org/10.16182/j.issn1004731x.joss.201811027

Last Page

4276

CLC

P631.6

Recommended Citation

Sun Qifeng, Duan Youxiang, Yan Yanan, Li Hongqiang. Forward Algorithm of LWD Azimuthal Gamma[J]. Journal of System Simulation, 2018, 30(11): 4268-4276.

DOI

10.16182/j.issn1004731x.joss.201811027