New Geological Progress of QNLM
Src:QNLMCHINA     08:48:01 05/17/2018

New progress has been made in the joint elastic-electrical properties of anisotropic porous rocks by Professor HAN Tongcheng from Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology (QNLM), which has been outlined in a paper entitled “Joint elastic-electrical properties of artificial porous sandstone with aligned fractures” in one of the top Geological Journals Geophysical Research Letters.

Seismic and electromagnetic surveys are important geophysical applications, and the joint interpretation of seismic and electromagnetic survey data is becoming popular to better characterize the rocks underneath. However, very little research has been conducted on the cross-property relationship between the elastic and electrical properties of fractured porous rocks, a key to the successful joint interpretation of seismic and electromagnetic data in anisotropic formations. Based on dedicated laboratory experiments and theoretical modeling, Prof. HAN shows how elastic velocity and electrical conductivity are linked in porous sandstone with aligned fractures and how the joint properties are affected by the fractures. The P and SH wave velocities are found to be approximately linearly correlated with electrical conductivity when measured in varying directions, and the linear trends are determined by the geometry and amount of the fractures in the rocks. The results provide a pathway to successful joint interpretation in fractured rocks. This research is highly spoken of by international reviewers and the chief journal editors. They believe the results not only improve the understanding of the propagation of seismic and electromagnetic waves in porous media, but also are of great significance in the joint seismic and electrical characterization of fractures and in the joint inversion and interpretation of seismic and electromagnetic data.

In recent years, Prof. HAN Tongcheng has conducted in-depth researches in the joint elastic-electrical properties of porous rocks and has made many original achievements. He has published 15 SCI articles as the first author in top geophysical journals like Geophysical Journal International, Geophysics and Geophysical Prospecting, etc.

Geophysical Research Letters is a flagship academic journal in the field of geophysics and has great academic influence. The impact factor in 2017 was 4.253, being one of the top Journals of Geosciences in SCI Area 1.