title: A novel method for quantitative geosteering using azimuthal gamma-ray logging.
abstract: A novel method for quantitative geosteering by using azimuthal gamma-ray logging is proposed. Real-time up and bottom gamma-ray logs when a logging tool travels through a boundary surface with different relative dip angles are simulated with the Monte Carlo method. Study results show that response points of up and bottom gamma-ray logs when the logging tool moves towards a highly radioactive formation can be used to predict the relative dip angle, and then the distance from the drilling bit to the boundary surface is calculated.
authors.affiliation: Department of Well Logging and Remote Sensing Technology, Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China. Electronic address: vipyuanchao@hotmail.com.
authors.forename: Chao
authors.initials: C
authors.lastname: Yuan
authors.affiliation: Department of Well Logging and Remote Sensing Technology, Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China.
authors.forename: Cancan
authors.initials: C
authors.lastname: Zhou
authors.affiliation: School of Geosciences, China University of Petroleum (East China), Qingdao, Shandong Province 266580, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Zhang
authors.affiliation: Department of Well Logging and Remote Sensing Technology, Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China.
authors.forename: Song
authors.initials: S
authors.lastname: Hu
authors.affiliation: Department of Well Logging and Remote Sensing Technology, Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China.
authors.forename: Chaoliu
authors.initials: C
authors.lastname: Li
keywords: Azimuthal gamma-ray logging; Geosteering; Monte Carlo simulation; Quantitative method; Real-time data