Pub Date : 2019-04-24DOI: 10.3997/2214-4609.201900426
H. Duerrast
{"title":"Investigating parameters m, n, and a in the extended Archie’s Equation for clayey soils","authors":"H. Duerrast","doi":"10.3997/2214-4609.201900426","DOIUrl":"https://doi.org/10.3997/2214-4609.201900426","url":null,"abstract":"","PeriodicalId":393867,"journal":{"name":"EAGE-GSM 2nd Asia Pacific Meeting on Near Surface Geoscience and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132849504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-24DOI: 10.3997/2214-4609.201900409
Z. Chen, X. Meng, Y. Liu
{"title":"The pre-salt regional structural framework of Kwanza and Lower Congo basin, offshore in West Africa revealed by gravity and seismic data","authors":"Z. Chen, X. Meng, Y. Liu","doi":"10.3997/2214-4609.201900409","DOIUrl":"https://doi.org/10.3997/2214-4609.201900409","url":null,"abstract":"","PeriodicalId":393867,"journal":{"name":"EAGE-GSM 2nd Asia Pacific Meeting on Near Surface Geoscience and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131292314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-24DOI: 10.3997/2214-4609.201900411
E. Masyhur, A. Rafek, K. Noh
{"title":"Utilization of Air Wave to Determine the Quality of Seismic Refraction Data in Near Surface Geophysical Survey","authors":"E. Masyhur, A. Rafek, K. Noh","doi":"10.3997/2214-4609.201900411","DOIUrl":"https://doi.org/10.3997/2214-4609.201900411","url":null,"abstract":"","PeriodicalId":393867,"journal":{"name":"EAGE-GSM 2nd Asia Pacific Meeting on Near Surface Geoscience and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115246681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-24DOI: 10.3997/2214-4609.201900423
T. Nontapot, P. Giao, A. Puttiwongrak
{"title":"Geophysical Investigation of Seawater Intrusion at a Coastal Site in Phuket, Thailand","authors":"T. Nontapot, P. Giao, A. Puttiwongrak","doi":"10.3997/2214-4609.201900423","DOIUrl":"https://doi.org/10.3997/2214-4609.201900423","url":null,"abstract":"","PeriodicalId":393867,"journal":{"name":"EAGE-GSM 2nd Asia Pacific Meeting on Near Surface Geoscience and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121271297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-24DOI: 10.3997/2214-4609.201900431
W. Chen, S. Han, M. Y. Khan
{"title":"1-D inversion of surface-to-borehole TEM data based on grounded wire source","authors":"W. Chen, S. Han, M. Y. Khan","doi":"10.3997/2214-4609.201900431","DOIUrl":"https://doi.org/10.3997/2214-4609.201900431","url":null,"abstract":"","PeriodicalId":393867,"journal":{"name":"EAGE-GSM 2nd Asia Pacific Meeting on Near Surface Geoscience and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116233707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-24DOI: 10.3997/2214-4609.201900398
V. C. Latengke, I. Faiqi, P. Dewi, E. Nainggolan
{"title":"Characteristics of Muria Vulkanism and Tectonic Impact at Development of Nuclear Reactor in Muria, Central Java","authors":"V. C. Latengke, I. Faiqi, P. Dewi, E. Nainggolan","doi":"10.3997/2214-4609.201900398","DOIUrl":"https://doi.org/10.3997/2214-4609.201900398","url":null,"abstract":"","PeriodicalId":393867,"journal":{"name":"EAGE-GSM 2nd Asia Pacific Meeting on Near Surface Geoscience and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127480496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-24DOI: 10.3997/2214-4609.201900451
L. Zanzi, M. Taruselli, D. Arosio, L. Longoni, M. Papini
{"title":"Seismic noise spectral analysis techniques to monitor unstable rock blocks","authors":"L. Zanzi, M. Taruselli, D. Arosio, L. Longoni, M. Papini","doi":"10.3997/2214-4609.201900451","DOIUrl":"https://doi.org/10.3997/2214-4609.201900451","url":null,"abstract":"","PeriodicalId":393867,"journal":{"name":"EAGE-GSM 2nd Asia Pacific Meeting on Near Surface Geoscience and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132813029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-24DOI: 10.3997/2214-4609.201900427
A. Milano, D. Arosio, M. Loke, L. Longoni, M. Papini, Greta Tresoldi, L. Zanzi
To permanently monitor a river embankment in Colorno, Italy, a customized electrical resistivity tomography (ERT) system was installed in November 2018. ERT data are measured twice a day to monitor the internal hydrogeological conditions of the embankment. In this paper, we present the initial assessment of site-specific 3D geometry effects on 2D ERT data measured with the monitoring system. Using average resistivity values of the levee material, 2D and 3D models of the embankment were reconstructed in RES2DMOD and RES3DMODx64. Apparent resistivity pseudosections were calculated for different profiles along the embankment and pseudosections of resistivity differences between 2D and 3D modellings were then calculated for all profiles. The results show that regardless of the lateral position, all measurements along the embankment are distorted by 3D effects, especially in deeper parts. For the smallest electrode spacings, the profile in the middle of the embankment measures data closer to real values. Our next research perspective is to use 3D field measurements and samples of the embankment to more precisely quantify the site-specific 3D effects. Considering that clay is one of the main materials used in constructing this embankment, we also plan to explore the 3D effects on 2D induced polarization (IP) measurements.
{"title":"Assessment of 3D geometry effects on 2D ERT data of a permanent monitoring system along a river embankment","authors":"A. Milano, D. Arosio, M. Loke, L. Longoni, M. Papini, Greta Tresoldi, L. Zanzi","doi":"10.3997/2214-4609.201900427","DOIUrl":"https://doi.org/10.3997/2214-4609.201900427","url":null,"abstract":"To permanently monitor a river embankment in Colorno, Italy, a customized electrical resistivity tomography (ERT) system was installed in November 2018. ERT data are measured twice a day to monitor the internal hydrogeological conditions of the embankment. In this paper, we present the initial assessment of site-specific 3D geometry effects on 2D ERT data measured with the monitoring system. Using average resistivity values of the levee material, 2D and 3D models of the embankment were reconstructed in RES2DMOD and RES3DMODx64. Apparent resistivity pseudosections were calculated for different profiles along the embankment and pseudosections of resistivity differences between 2D and 3D modellings were then calculated for all profiles. The results show that regardless of the lateral position, all measurements along the embankment are distorted by 3D effects, especially in deeper parts. For the smallest electrode spacings, the profile in the middle of the embankment measures data closer to real values. Our next research perspective is to use 3D field measurements and samples of the embankment to more precisely quantify the site-specific 3D effects. Considering that clay is one of the main materials used in constructing this embankment, we also plan to explore the 3D effects on 2D induced polarization (IP) measurements.","PeriodicalId":393867,"journal":{"name":"EAGE-GSM 2nd Asia Pacific Meeting on Near Surface Geoscience and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131849932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-24DOI: 10.3997/2214-4609.201900447
K. Chimoto, H. Yamanaka, S. Tsuno, M. Korenaga, H. Miyake, S. Senna
Summary The Fujikawa-kako fault zone in central Japan is one of the most active faults. For the strong motion prediction, it is necessary to construct S-wave velocity structure model of sedimentary layers around the fault zone. Several 3D velocity structure models has been proposed in the area. In order to choose the appropriate velocity structure model, we used seismic interferometry to retrieve Green’s functions and estimated group velocity of Rayleigh wave from the crosscorrelation function. The crosscorrelation functions in the vertical component propagate with the velocity of 1 km/s. Group velocity of the Green’s function was estimated using Frequency-Time Analysis. We observed clear group velocity between the stations pairs across the fault. The estimated velocity was slower than the theoretical velocity of the existing model. There is possibility to use group velocity for the improvement of the existing S-wave velocity structure model.
{"title":"Estimation of group velocity of Green’s function in the sedimentary basin from crosscorrelation of ambient noise around","authors":"K. Chimoto, H. Yamanaka, S. Tsuno, M. Korenaga, H. Miyake, S. Senna","doi":"10.3997/2214-4609.201900447","DOIUrl":"https://doi.org/10.3997/2214-4609.201900447","url":null,"abstract":"Summary The Fujikawa-kako fault zone in central Japan is one of the most active faults. For the strong motion prediction, it is necessary to construct S-wave velocity structure model of sedimentary layers around the fault zone. Several 3D velocity structure models has been proposed in the area. In order to choose the appropriate velocity structure model, we used seismic interferometry to retrieve Green’s functions and estimated group velocity of Rayleigh wave from the crosscorrelation function. The crosscorrelation functions in the vertical component propagate with the velocity of 1 km/s. Group velocity of the Green’s function was estimated using Frequency-Time Analysis. We observed clear group velocity between the stations pairs across the fault. The estimated velocity was slower than the theoretical velocity of the existing model. There is possibility to use group velocity for the improvement of the existing S-wave velocity structure model.","PeriodicalId":393867,"journal":{"name":"EAGE-GSM 2nd Asia Pacific Meeting on Near Surface Geoscience and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134408928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-24DOI: 10.3997/2214-4609.201900377
H. Hashim, Y. M. Tang, A. Latiff, D. Ghosh
Summary With increasing hydrocarbon exploration in deepwater regions, the need to acquire accurate seismic data becomes much more important. One of the main challenges in acquiring seismic data in this area is the presence of internal multiple. This seismic multiples are usually considered as insignificant compared to the surface-related multiples, however if the target areas lies in a deeper region, it becomes much more prominent due to the weaker primary reflections. If this type of seismic noise is not handled correctly, it can effect the seismic reservoir and characterization and thus increasing the risk in oil exploration. Therefore a more advanced method needs to be applied, and one such method is the inverse scattering series. This method is data-driven therefore unlike other internal multiple attenuation technique, its does not require any prior information of the subsurface to predict the multiple. The application of this method in offshore Malay basin shows significant results, as the seismic data produced shows an improvement with a cleaner image compare to the one without any internal multiple removal.
{"title":"Elimination of Internal Multiple using Inverse Scattering Series in Malay Basin - A Case Study","authors":"H. Hashim, Y. M. Tang, A. Latiff, D. Ghosh","doi":"10.3997/2214-4609.201900377","DOIUrl":"https://doi.org/10.3997/2214-4609.201900377","url":null,"abstract":"Summary With increasing hydrocarbon exploration in deepwater regions, the need to acquire accurate seismic data becomes much more important. One of the main challenges in acquiring seismic data in this area is the presence of internal multiple. This seismic multiples are usually considered as insignificant compared to the surface-related multiples, however if the target areas lies in a deeper region, it becomes much more prominent due to the weaker primary reflections. If this type of seismic noise is not handled correctly, it can effect the seismic reservoir and characterization and thus increasing the risk in oil exploration. Therefore a more advanced method needs to be applied, and one such method is the inverse scattering series. This method is data-driven therefore unlike other internal multiple attenuation technique, its does not require any prior information of the subsurface to predict the multiple. The application of this method in offshore Malay basin shows significant results, as the seismic data produced shows an improvement with a cleaner image compare to the one without any internal multiple removal.","PeriodicalId":393867,"journal":{"name":"EAGE-GSM 2nd Asia Pacific Meeting on Near Surface Geoscience and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132017206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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