Proceedings of the 7th International Conference on Environment and Engineering Geophysics & Summit Forum of Chinese Academy of Engineering on Engineering Science and Technology

Session: Near-Surface Geophysics

33 articles
Proceedings Article

Geoelectric investigation of a proposed Mambilla Plateau Airport Runway, Taraba State, Nigeria

B.O. Omisore, M.O. Olorunfemi, Sheng Jin
Geoelectric investigation, involving electrical resistivity method, was carried out within a site earmarked for an airport runway in the Mambilla Plateau, Taraba State, Nigeria. The objective was to generate surface and subsurface geologic information required for the location and design of a stable...
Proceedings Article

Application of FDEMS for geological horizons mapping

I. Ingerov, A. Lozovoy, Y. Mendriy
The frequency domain electromagnetic methods (FDEM) could be separated in two groups: 1)Shallow FDEM profiling techniques which use high frequency bands and mainly utilize only the magnetic components of the EM field; 2)Electromagnetic soundings in wide depths intervals, consisting of two sub methods:...
Proceedings Article

Application of In-situ Sonic Wave Test Method in the effect evaluation of grouting treatment in Weak Rock

Hongming Luo, Shanxiong Chen, Bo Yu
By using the borehole elastic modulus test and sound wave inspection for typical representative spots of a dam foundation, the deformation behavior parameters of grouted weak rock of workplace foundation are obtained, and the potential relationship between wave velocity VP and elastic modulus E is derived....
Proceedings Article

CMP stacking for multi-channel analysis of single-shot surface wave data

Feng Cheng, Binbin Mi, Yue Hu, Zongbo Xu, Jianghai Xia
We demonstrate that common mid-point (CMP) stacking analysis for common virtual-source (CVS) cross-correlation gathers of multi-channel and single-shot surface wave data give accurate phase-velocity curves, and enable us to reconstruct 2D Vs structures with high resolution. Data processing for CMP stacking...
Proceedings Article

Combined use of active and passive surface waves for the S-wave velocity structure delineation beneath the Balikun Basin, China

Jing Lin, Yinhe Luo, Hongri Xu
Rayleigh waves have been widely used to estimate the shear-wave velocity structure in the fields of shallow engineering and environmental detection. In this study, active and passive surface wave surveys were performed sequentially on the same survey line across the eastern Balikun Basin. MASW (Multi-channel...
Proceedings Article

Frequency characteristics of perforation and fracturing induced microseismic events recorded by downhole and surface arrays

Ruizhao Yang, Zhengguang Zhao
Surface microseismic monitoring of hydraulic fracturing is now becoming more and more popular in the production of unconventional hydrocarbons. The frequency analysis of surface detected microseismic event and comparison with perforation event and downhole recorded event may lead to deeper understanding...
Proceedings Article

Multiple-track ant body attribute extraction method improved

Wenfeng Du, Pengfei Xin, Pan Wang, Yingchuan Sun
to interpret small faults is always the core question for seismic exploration. Seismic attributes can help us understand the fault and fracture system better. The earthquake frequency controls seismic resolution, if the resolution is relatively low, minor faults or micro-fractures portrayed through the...
Proceedings Article

Studies on multi-scale full waveform inversion for time-domain acoustic wave equation based on virtual-source precondition

Mengxue Dai, Jingbo Chen
Time-domain multi-scale full waveform inversion (FWI) is an important method for seismic imaging. Using different frequency contents of seismic data, this method mitigates the effect of the local-minima problem by sequential inversion. One of the important factors determining the convergence rate of...
Proceedings Article

Detection of railway subgrade moisture content by GPR

Sixin Liu, Jiaqi Cai, Lei Fu, Yanqian Feng
In cold regions, heaving of the railway subgrade is an important security risk to high-speed railway. It is necessary to find out the moisture content of the subgrade to secure the normal railway operation. Common Mid-Point (CMP) measurement using Ground Penetrating Radar (GPR) was carried out to estimate...
Proceedings Article

Hydraulic Fracture Orientation and Stress Field Revealed by Surface Based Microseismic Monitoring

Zhengguang Zhao, Ruizhao Yang
Surface based micro-seismic monitoring of well stimulation by hydraulic fracture now has been accepted by domestic oil and gas industry. Micro-seismic data can be used to evaluate the stimulation result, predict reservoir stress state and guide the drilling of horizontal laterals, etc. Surface based...
Proceedings Article

Application of passive surface-wave method for Quzika hydropower damsite exploration

Chaofan Wang, Jian Zhang, Xueming Wu, Guoqiang Dai, Hui Xu, Dong Zhao, Lihui Zhao
The passive surface wave method can detect the shear wave velocity structure of subsurface mediums, by recording the vertical component of weak vibration on the earth's surface, and then extracting Rayleigh wave dispersion curve. This paper documents the first application of the passive surface wave...
Proceedings Article

Study on forward modeling of Submarine fault and slide based on FDM

Lei Chen, Bin Liu, Jie Song, Shucai Li, Xinji Xu, Ming Li
With the development of the seismic numerical modeling theory, a group of scholars do lots of seismic forward modeling studies. In this paper, wave equation finite difference method(FDM)[1] was used to build models of submarine fault and slide and forward seismic modeling. By studying character and imaging...
Proceedings Article

Test and Application of Magnetic Survey in Detecting Ancient Wooden Sunken Boats

Mingsong Qi, Fei Cheng, Weimin Lu, Aimei Ma, Chuanlei Wang
There are rich cultural heritages both underwater and in land in China, which is the object concerned by archaeologists and historic researchers, especially the ancient wooden sunken boats containing the past information of old human civlilization we can restore. Detections for buried magnetic massive...
Proceedings Article

Quasi-analytic solution of the magnetotelluric vertical layered anisotropic model

Bing Xue, Ling Huang, Guangyou Fang, Yicai Ji
In order to explain the surveyed data more accurately and have a better understanding of the distribution of geoelectricity, two-dimensional partial differential equations of Magnetotelluric in anisotropic media are employed to establish vertical layered medium axially anisotropic model by Fourier Transform...
Proceedings Article

Primary Research on Off-resonance Response of Underground Magnetic Resonance Sounding in Tunnel

Kerui Fan, Xiu Li, Shucai Li, Bin Liu
We present in this paper a forward modelling of the three dimensional off-resonance response of underground MRS used in advanced geological prediction of constructing tunnel. By considering and summarizing the off-resonance response in SNMR, we deduced the off-resonance response of underground MRS. Using...
Proceedings Article

Study on the geothermal model of Gonghe-Guide region, Qinghai, China

Xueyu Zhao, Zhaofa Zeng, Kun Wang, Nan Huai
The Gonghe basin in north-eastern Qinghai-Tibetan plateau of China is a potential geothermal field, where there have been some hot springs discovered in recent years. The seismic and magnetotelluric sounding (MT) inversion results in this area show that there are deep crustal fractures which might be...
Proceedings Article

Detection of near-surface fissures by generalized S-transform of Rayleigh waves

Guangzhou Shao, Dong Jin
Because of the strong energy of Rayleigh wave, high signal to noise ratio and high efficiency, as a new type of engineering geophysical exploration methods, Rayleigh wave exploration get more and more attention in recent years.And because of the in-homogeneity of the earth's surface medium, the Rayleigh...
Proceedings Article

Combined Inversion of Early Arrival P-wave and Rayleigh Wave with Cross-gradient Constraint

Lei Fu, Sixin Liu
We present a combined early arrival P-wave and Rayleigh wave inversion strategy that uses the cross-gradient between the P-velocity and S-velocity as a regularization term. First, the P-velocity model is inverted by the early arrival full wave inversion (FWI) method. Then the magnitude spectra of the...
Proceedings Article

Application of Large Tonnage Vehicle-Mounted Vibrator Source in the Exploration of Underlying Xi'an Ground Fissure

Zhongsheng Li, Zhonsheng Wang, Kehong Yuan, Huyan Gao
How to overcome the urban interference, especially to suppress day and night traffic vibratory noise in underlying Xi'an ground fissure exploration has been a difficult problem for shallow seismic prospecting in engineering purpose. Based on in Xi'an Metro Line 6 engineering, we try to use large tonnage...
Proceedings Article

Application of Transient Electromagnetic Method in saturation region detection in tailings dam

Yingsa Hu, Zhaofa Zeng, Xiong Chen, Xueyu Zhao
Since the 1950 s, Taolin ore has been exploited. Almost a hundred tons of tailing were backfilled between the hills for a long time, which formed Taolin dam during 50 years backfilling deposition. The stability of the huge dam is of great importance for the local people's life and property protection....
Proceedings Article

2-D anisotropic magnetotelluric numerical simulation under undulating terrain based on meshfree radial point interpolation method

Tingzhe Huang, Yanju Ji, Wanyu Huang, Tonglin Li
In view of the problem that widespread existing undulating terrain and anisotropic in the actual geophysical prospecting, we propose a numerical simulation method which only needs discrete nodes to construct the shape function. Assuming the electrical spindle axis of underground anisotropic medium is...
Proceedings Article

A Novel Technique for Synthetic Source of Multiple Electromagnetic Data Sets*

Liting Rao, Xin Wu, Rui Guo, Pan Xiao, Xiaojuan Zhang, Guangyou Fang
A novel technique for synthetic source of multiple electromagnetic data sets is presented. The technique applies weighting to multiple transmitters of small magnetic moment loops to form a synthetic source for deep deposits exploration in complex terrain. In order to determine the weighting coefficient,...
Proceedings Article

A 3D finite volume method solver for scattering from lossy objects in layered media

Jinghe Li, Bin Xiong, Zhifeng Xu, Yixian Xu, Bo Yang, Ying Liu
A 3D frequency-domain finite volume method (FVM) solver is developed for scattering from lossy objects embedded in layered media. Based on the Yee staggered grids, the formulation derivation for FVM are presented in this paper. Two numerical examples with a 3D cuboid embedded in a half space and in a...
Proceedings Article

Surface waves simulation in porous media by domain decomposition

Yu Zhang, Shuangxi Zhang, Ping Ping
A numerical approach for free surface boundary formulation is proposed for simulation of surface waves in porous media, based on the Biot poroelastic model. A set of free surface characteristic variables for incoming and outgoing wave fields are set by domain decomposition for solid and fluid velocity...
Proceedings Article

The logging characteristics and evaluation methods of hydrocarbon source rock in coal measures

Pengfei Xin, Pan Wang, Xiaoting Li, Yingchuan Sun
Hydrocarbon source rock is the foundation of oil and gas exploration research. At present, geochemical methods are still the mainly used for hydrocarbon source rock studies, which is hard to obtain a continuous data on a single well owing to the limited samples and experimental fees. Logging information...
Proceedings Article

The Analysis of Instantaneous Polarization Attribute in Crosswell Seismic Wave Field

Dai Yu, Yuan Sun, Dong Li, Hui Wang, Guangyi Hu
In the stage of oilfield development, the fractures of clasolite reservoir begin to develop after the process of fracturing and water flooding. At the same time, the lateral heterogeneity has the significant changes, and this situation will cause the abnormal changes of many seismic attribute parameters....
Proceedings Article

Acquisition footprints extracting from raw data can be estimated by the azimuth and offset Entropy of the geometry

DengKe He
to be differently using the amplitude section from stack volume, the acquisition footprint can be represented by energy distribution of the raw seismic in the paper. Furthermore, the paper discussed the distributions of the offset entropy and azimuth entropy of the geometry, described the similarity...
Proceedings Article

Research on application of Hilbert transform in radar signal simulation

Longjin Zheng, Zhixin Liu, Guangtao Wang, Zhaoqiao Zhang
At present, the radar is used to analyze the radar time range profile, which is mainly based on the kinematic characteristics of radar wave. With the constantly mature of the analytic method of signal analysis of GPR, we can effectively extract the "three instantaneous attributes" (the instantaneous...
Proceedings Article

Measurement of three components in mining and geothermal exploration

I. Ingerov
In the middle of the last century, surface multiturn coils and quartz variometers served as sensor components of the alternating magnetic field. Later, they were replaced by fluxgate sensors measuring the alternating magnetic field against its constant component and induction sensors reacting only to...
Proceedings Article

Methods for Determining the Safety Distance in the Urban Land Planning

Xingwei Sun
With the rapid advance of Chinese cities constructions, the lack of urban land is going increasingly. While in urban planning, people should avoid the hidden active faults, because they directly triggered a variety of geological disasters such as rupture, earthquakes. In order to solve this contradiction,...
Proceedings Article

Experimental study of rock mass characteristics for Kariba Power Station based on the acoustic and optical loggingÿtechnology

Liming Zhou, Fagang Wang, Rong Luo, Guoqiang Xiao
In order to estimate the geological and structural rock mass characteristics in the site of upper course cofferdam of water inlet, gate shaft of water inlet and Sd1 district in south bank expansion project of Kariba south power station, Some experimental investigations were done based on the acoustic...
Proceedings Article

Application Research on Transient Rayleigh Technology in Pile Foundation Detection

Wei Wu, Jin Yang, Xianmin Zhang
Detection of pile foundation is one of the most important procedures in the evaluation of pile bearing capacity and pile quality. In this paper, the application of the transient Rayleigh technology in detection of pile foundation (pile integrity, pile verticality and pile bearing capacity) have been...
Proceedings Article

The availability and limitation of Geophysical at the On-Site Inspection

Xinjun Li, Muen Tang, Qiang Tan, Zenghu Ma
Based on the generic name of Continuation Period Techniques (CPT), various different and effective Geophysical Techniques are covered. According to the Paragraph 69, Part II of the Protocol to the Comprehensive Nuclear-Test-ban Treaty(CTBT), the techniques allowed once the continuation of the inspection...