Detecting cold spring gas leakage in seabed sediment with marine multi-electrode resistivity method: numerical simulation and experiment

Shang Kexu; Guo Xiujun; Wu Jingxin; Jia Yonggang

doi:10.3969/j.issn.0253-4193.2017.11.008

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Shang Kexu, Guo Xiujun, Wu Jingxin, Jia Yonggang. Detecting cold spring gas leakage in seabed sediment with marine multi-electrode resistivity method: numerical simulation and experiment[J]. Haiyang Xuebao, 2017, 39(11): 85-96. doi: 10.3969/j.issn.0253-4193.2017.11.008

Citation:

Shang Kexu, Guo Xiujun, Wu Jingxin, Jia Yonggang. Detecting cold spring gas leakage in seabed sediment with marine multi-electrode resistivity method: numerical simulation and experiment[J]. Haiyang Xuebao, 2017, 39(11): 85-96. doi: 10.3969/j.issn.0253-4193.2017.11.008

Citation:

Shang Kexu, Guo Xiujun, Wu Jingxin, Jia Yonggang. Detecting cold spring gas leakage in seabed sediment with marine multi-electrode resistivity method: numerical simulation and experiment[J]. Haiyang Xuebao, 2017, 39(11): 85-96. doi: 10.3969/j.issn.0253-4193.2017.11.008

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Detecting cold spring gas leakage in seabed sediment with marine multi-electrode resistivity method: numerical simulation and experiment

doi: 10.3969/j.issn.0253-4193.2017.11.008

1.
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
2.
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;Key Laboratory of Marine Environment and Geological Engineering of Shandong Province, Qingdao 266100, China

Received Date: 2016-12-08
Rev Recd Date: 2017-03-20

Abstract

Abstract

Ability of marine multi-electrode resisitivity method to detect the process of cold spring gas leakage in seabed sediment would been analysed and evaluated in this paper. In order to meet this object, on the base of predecessors' research results and some concrete examples, the geoelectric models of sediments were built, then theoretical electrical resisitivity sections were calculated while marine multi-electrode resisitivity method was used to detect the gathering, leaking and erupting of fast or slow cold spring gas in seabed sediment. Compare the numerical simulation resisitivity images and experimental ones, some results have been generalized. In the detected section images of rapid cold spring. Gas bearing layer and leakage passages in different phases of leakage performanced for different anomaly resistivity image characteristics, but they were easy to identify. In the detected section images of slow cold spring, gas enrichment region in shallow sediment showed obvious high resistivity anomaly. As the gas leaked, abnormal area gradually disappeared. Two types of landforms formed by gas eruption process could also be reflected in the detected images. Marine multi-electrode resisitivity method was proved to be an effective method which could describe the gas bearing layer, leakage passage and spatial distribution of gas and liquid interface position with measured anomaly images.
- cold spring,
- gas leakage,
- marine multi-electrode resistivity method,
- anomaly image

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References(22)

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