Contact-type induced polarization and its application for detecting leakage
LI Jinghe1, HE Zhanxiang2,3, YANG Jun4, RAN Mengkun1
1. College of Earth Sciences, Guilin University of Technology, Guilin, Guangxi 541004, China; 2. Shenzhen Key Laboratory of Deep Sea Oil and Gas Exploration Technology, Institute of Frontier and Interdisciplinary Sciences, Shenzhen, Guangdong 518055, China; 3. Southern University of Science and Technology, Shenzhen, Guangdong 518055, China; 4. Guangxi Transportartion Science & Technology Group Co., LTD, Nanning, Guangxi 530006, China
Abstract：Heavy metal pollution and oil/gas leakage are major sources of pollution in mining areas and industrial sites. Such environmental pollution caused by heavy metal pollution and leakage seriously affects our life and national economy. How to deve-lop a new monitoring technology for detecting wastewater with heavy metal and oil/gas leakage is a very challenging task if considering monitoring cost, efficiency and accuracy. This paper describes contact-type induced polarization and its application. Two kinds of observation systems (contact power supply and ground observation; contact power supply and direct observation) are proposed, which can reduce the limitations in a complex construction environment, and improve the strength and accuracy of observed signals. Then the mechanism of microscopic polarization effect of contact-type heavy metal pollution is discussed in details, the content of heavy metal elements in contaminated samples is determined by emission spectrometry, and the polarizability of the samples is determined by a dipole-dipole method. In the study, two physically simulated soil tank tests were designed for simulating the initial state and diffusion state of heavy metal pollution, and the results were compared with the traditional induced polarization method to verify the existence of the contact-type induced polarization effect of heavy metal contaminated soil and its feasibility in detecting oil/gas leakage. The results provide an effective reference to detecting heavy metal pollution, oil leakages from oil tanks and underground oil/gas reservoirs.
李静和, 何展翔, 杨俊, 冉孟坤. 针对渗漏型目标的新型接触式激电法及应用[J]. 石油地球物理勘探, 2021, 56(3): 659-669.
LI Jinghe, HE Zhanxiang, YANG Jun, RAN Mengkun. Contact-type induced polarization and its application for detecting leakage. Oil Geophysical Prospecting, 2021, 56(3): 659-669.
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