|
|
|
| Interpretation of ultrasonic imaging logging data obtained in Drill Hole ZDSD-1 of the Zedang Scientific Drilling in Tibet |
| LIU Dong-Ming, LIN Zhen-Zhou, GAO Wen-Li, KONG Guang-Sheng, JIA Ding-Yu |
| Institute of Geophysical and Geochemical Exploration,CAGS,Langfang 065000,China |
|
|
|
|
Abstract Drill Hole ZDSD-1 is the third scientific drilling hole in the Luobusha chromite deposit,belonging to the "continental scientific drilling:site selection and pilot hole" project,and its final depth is 1486.86 m.The drill hole implemented continuous coring and conducted geophysical well logging.The ultrasonic image logging data contained a mass of information about the borehole wall geological features,which played an important role in the identification of fractures,fracture zones and the analysis of tectonic stress field.Using the ultrasonic image logging data,the authors found that most fractures exhibit the form of dark stripes whose width changes obviously,the fracture zones in most cases exhibit littery dark patches,while they assume a large area of dark stripes where the strata are broken seriously, and the borehole breakouts exhibit a pair of symmetrical dark straight stripes or patches spacing 180 degree.Through the statistics of the orientation for 20 pairs of borehole breakouts,the authors infer that the orientation of the maximum horizontal principal stress for drill hole ZDSD-1 is 40.3°~218.4°.
|
|
Received: 24 November 2016
Published: 20 August 2017
|
|
|
|
|
|
| [1] |
CHEN Xiu-Juan, LIU Zhi-Di, LIU Yu-Xi, CHAI Hui-Qiang, WANG Yong. Research into the pore structure of tight reservoirs:A review[J]. Geophysical and Geochemical Exploration, 2022, 46(1): 22-31. |
| [2] |
XIAO Guan-Hua, ZHANG Wei, CHEN Heng-Chun, ZHUO Wu, WANG Yan-Jun, REN Li-Ying. Application of shallow seismic reflection surveys in the exploration of urban underground space in Jinan[J]. Geophysical and Geochemical Exploration, 2022, 46(1): 96-103. |
|
|
|
|
