Pub Date : 2021-11-23DOI: 10.18303/2619-1563-2021-1-4
A. Kosmacheva, M. Fedorovich
We present the interpretation of 2D seismic data in the Vilyui hemisyneclise located in the Republic of Sakha (Yakutia). The model identifies structural and tectonic features and tectonic development history of the Mesozoic deposits in the Vilyui hemisyneclise. Structure contour maps for the reflecting horizons of the Mesozoic are qualitatively the same. Traced faults attenuate at various stratigraphic levels. The structures of the hemisyneclise are known to be formed during the Cretaceous stage of development.
{"title":"Structural description and tectonic development history of the mesozoic deposits in the Vilyui hemisyneclise","authors":"A. Kosmacheva, M. Fedorovich","doi":"10.18303/2619-1563-2021-1-4","DOIUrl":"https://doi.org/10.18303/2619-1563-2021-1-4","url":null,"abstract":"We present the interpretation of 2D seismic data in the Vilyui hemisyneclise located in the Republic of Sakha (Yakutia). The model identifies structural and tectonic features and tectonic development history of the Mesozoic deposits in the Vilyui hemisyneclise. Structure contour maps for the reflecting horizons of the Mesozoic are qualitatively the same. Traced faults attenuate at various stratigraphic levels. The structures of the hemisyneclise are known to be formed during the Cretaceous stage of development.","PeriodicalId":190530,"journal":{"name":"Russian Journal of Geophysical Technologies","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124922344","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 : 2021-11-23DOI: 10.18303/2619-1563-2021-1-52
E. Balkov, D. Fadeev
For the study of the first ten meters of the ground, instruments operating in the frequency domain are most widely used. The compactness, speed of operation, ease of operation of such equipment, as well as the quality of the information obtained, determine its applicability for solving a wide range of issues: from searching for local objects to identifying structural features of the upper part of the section. The article provides an overview of current hardware and software developments for near surface electromagnetic soundings in the frequency domain. A description of all types of non-contact equipment from major world manufacturers is given. The features of both the hardware itself and the approaches to their implementation are described. Methods of primary processing and data inversion are considered. Conclusions are drawn about the need to find new ways to eliminate of equipment deficiencies.
{"title":"Overview of modern hardware and software for near surface electromagnetic sounding in the frequency domain","authors":"E. Balkov, D. Fadeev","doi":"10.18303/2619-1563-2021-1-52","DOIUrl":"https://doi.org/10.18303/2619-1563-2021-1-52","url":null,"abstract":"For the study of the first ten meters of the ground, instruments operating in the frequency domain are most widely used. The compactness, speed of operation, ease of operation of such equipment, as well as the quality of the information obtained, determine its applicability for solving a wide range of issues: from searching for local objects to identifying structural features of the upper part of the section. The article provides an overview of current hardware and software developments for near surface electromagnetic soundings in the frequency domain. A description of all types of non-contact equipment from major world manufacturers is given. The features of both the hardware itself and the approaches to their implementation are described. Methods of primary processing and data inversion are considered. Conclusions are drawn about the need to find new ways to eliminate of equipment deficiencies.","PeriodicalId":190530,"journal":{"name":"Russian Journal of Geophysical Technologies","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127327149","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 : 2021-11-23DOI: 10.18303/2619-1563-2021-1-38
A. Belyashov, Ts. A. Tubanov
Whereas the defined velocity model plays a key role in the process of seismic events localization, so selection of the model as much as possible corresponding to the real velocity conditions of the investigated area becomes a crucial task. Basing on the analyses of published results of the Lake Baikal area seismic study a layered P-waves models for two situations defined: For the high velocity consolidated rock on the lake banks and low velocity sediments up to 10 km thick under the lake bottom.
{"title":"Velocity models fitting for the seismic events location within the Baikal rift zone","authors":"A. Belyashov, Ts. A. Tubanov","doi":"10.18303/2619-1563-2021-1-38","DOIUrl":"https://doi.org/10.18303/2619-1563-2021-1-38","url":null,"abstract":"Whereas the defined velocity model plays a key role in the process of seismic events localization, so selection of the model as much as possible corresponding to the real velocity conditions of the investigated area becomes a crucial task. Basing on the analyses of published results of the Lake Baikal area seismic study a layered P-waves models for two situations defined: For the high velocity consolidated rock on the lake banks and low velocity sediments up to 10 km thick under the lake bottom.","PeriodicalId":190530,"journal":{"name":"Russian Journal of Geophysical Technologies","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125679610","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 : 2021-03-24DOI: 10.18303/2619-1563-2020-4-4
N. I. Shestakova, S. Ershov, V. N. Bardachevskiy
The structure and seismogeological characteristics of the Achimov strata of the Gydan Peninsula are considered. Geological and geophysical criteria for the regional forecast of oil and gas potential, taking into account the clinoform structure of the Berriasian-Lower Aptian deposits, are proposed. Based on the interpretation of drilling data and 2D seismic exploration, predictive maps of the thickness of sand bodies were constructed, depocenters of accumulation of sandy material were mapped. Seismostratigraphic studies, which are based on a comprehensive analysis of the wave pattern of time seismic sections, dynamic and seismic facies analyzes, as well as paleotectonic and paleogeomorphological reconstructions, made it possible to identify the Salmanovskaya and Yuzhno-Gydanskaya oil and gas zones in the Achimov strata of the Gydan Peninsula.
{"title":"Criteria for petroleum potential and forecast of oil and gas prospective zones in the Achimov deposits of the Gydan Peninsula","authors":"N. I. Shestakova, S. Ershov, V. N. Bardachevskiy","doi":"10.18303/2619-1563-2020-4-4","DOIUrl":"https://doi.org/10.18303/2619-1563-2020-4-4","url":null,"abstract":"The structure and seismogeological characteristics of the Achimov strata of the Gydan Peninsula are considered. Geological and geophysical criteria for the regional forecast of oil and gas potential, taking into account the clinoform structure of the Berriasian-Lower Aptian deposits, are proposed. Based on the interpretation of drilling data and 2D seismic exploration, predictive maps of the thickness of sand bodies were constructed, depocenters of accumulation of sandy material were mapped. Seismostratigraphic studies, which are based on a comprehensive analysis of the wave pattern of time seismic sections, dynamic and seismic facies analyzes, as well as paleotectonic and paleogeomorphological reconstructions, made it possible to identify the Salmanovskaya and Yuzhno-Gydanskaya oil and gas zones in the Achimov strata of the Gydan Peninsula.","PeriodicalId":190530,"journal":{"name":"Russian Journal of Geophysical Technologies","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134474918","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 : 2021-03-24DOI: 10.18303/2619-1563-2020-4-42
S. Gorshkalev, W. Karsten
At present due to depletion of reserves in the majority of Western Siberia oil and gas fields, with reservoirs mainly related to lower Cretaceous and Jurassic section interval, the basement intervals present primary scientific and practical interest for prospecting and exploration. At the Bystrovka vibroseismic test site (Novosibirsk region), the Paleozoic basement occurs at depth of about 10 m. This allowed investigating its elastic properties with shallow seismic technique using VSP. Results of these investigations are presented in the present paper.
{"title":"Results of studying the azimuthal anisotropy of the Paleozoic basement with VSP technique at the Bystrovka vibroseismic test site","authors":"S. Gorshkalev, W. Karsten","doi":"10.18303/2619-1563-2020-4-42","DOIUrl":"https://doi.org/10.18303/2619-1563-2020-4-42","url":null,"abstract":"At present due to depletion of reserves in the majority of Western Siberia oil and gas fields, with reservoirs mainly related to lower Cretaceous and Jurassic section interval, the basement intervals present primary scientific and practical interest for prospecting and exploration. At the Bystrovka vibroseismic test site (Novosibirsk region), the Paleozoic basement occurs at depth of about 10 m. This allowed investigating its elastic properties with shallow seismic technique using VSP. Results of these investigations are presented in the present paper. ","PeriodicalId":190530,"journal":{"name":"Russian Journal of Geophysical Technologies","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126890601","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 : 2021-02-04DOI: 10.18303/2619-1563-2020-3-31
O. Kuchay
The directions of horizontal displacement along active geological faults in Central Asia are determined based on data on the mechanisms of earthquake foci that occurred near these faults. The results were compared with geologic materials. In eight cases out of ten, the analysis of calculating the direction of displacement obtained from seismological materials is consistent with the kinematics of faults.
{"title":"The horizontal displacements in active fault zones in Central Asia based on data on the mechanisms of earthquake foci","authors":"O. Kuchay","doi":"10.18303/2619-1563-2020-3-31","DOIUrl":"https://doi.org/10.18303/2619-1563-2020-3-31","url":null,"abstract":"The directions of horizontal displacement along active geological faults in Central Asia are determined based on data on the mechanisms of earthquake foci that occurred near these faults. The results were compared with geologic materials. In eight cases out of ten, the analysis of calculating the direction of displacement obtained from seismological materials is consistent with the kinematics of faults.","PeriodicalId":190530,"journal":{"name":"Russian Journal of Geophysical Technologies","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124466811","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 : 2020-12-17DOI: 10.18303/2619-1563-2020-2-41
V. Kontorovich
{"title":"Seismogeological characteristics, model of geological structure and oil and gas potential of the Laptev Sea shelf","authors":"V. Kontorovich","doi":"10.18303/2619-1563-2020-2-41","DOIUrl":"https://doi.org/10.18303/2619-1563-2020-2-41","url":null,"abstract":"","PeriodicalId":190530,"journal":{"name":"Russian Journal of Geophysical Technologies","volume":"168 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133104853","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 : 2020-12-17DOI: 10.18303/2619-1563-2020-2-4
I. Koulakov, N. A. Schelkanova, T. Stupina
We a of formal evaluation of spatial resolution in seismic tomography. We that a method of resolution estimate based on calculation of the resolution matrix appears to be misleading in a case of using the parameterization grid with different spacing. We have proposed an alternative algorithm based on reconstruction of a series of unit anomalies of fixed shapes. Furthermore, we have developed an algorithm for the direction dependent resolution estimates.
{"title":"Quantitative evaluation of spatial resolution in seismic tomography","authors":"I. Koulakov, N. A. Schelkanova, T. Stupina","doi":"10.18303/2619-1563-2020-2-4","DOIUrl":"https://doi.org/10.18303/2619-1563-2020-2-4","url":null,"abstract":"We a of formal evaluation of spatial resolution in seismic tomography. We that a method of resolution estimate based on calculation of the resolution matrix appears to be misleading in a case of using the parameterization grid with different spacing. We have proposed an alternative algorithm based on reconstruction of a series of unit anomalies of fixed shapes. Furthermore, we have developed an algorithm for the direction dependent resolution estimates.","PeriodicalId":190530,"journal":{"name":"Russian Journal of Geophysical Technologies","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124409415","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 : 2020-12-17DOI: 10.18303/2619-1563-2020-2-30
A. Trifonov, I. Koulakov
Using experimental data obtained from the network of stations installed on Kambalny volcano in the period from July 2018 to July 2019, a set of correlation functions was obtained and its preliminary interpretation was carried out. Works aimed at quality control of the obtained cross-correlation functions have been performed. We have identified considerable variations of the frequency-amplitude characteristics of the cross-correlation functions at small times, as well as significant shifts of the derived phases in large correlation times. Such variations of the cross-correlation patterns may indicate the existence of distinct time periods with different types of seismicity, as well as strong variations of mechanical properties of rocks. In turn, this might be an evidence for the ongoing activity of the magmatic system beneath the Kambalny volcano.
{"title":"Identification of changes in the activity of Kambalny volcano (South Kamchatka) based on correlation of seismic noise","authors":"A. Trifonov, I. Koulakov","doi":"10.18303/2619-1563-2020-2-30","DOIUrl":"https://doi.org/10.18303/2619-1563-2020-2-30","url":null,"abstract":"Using experimental data obtained from the network of stations installed on Kambalny volcano in the period from July 2018 to July 2019, a set of correlation functions was obtained and its preliminary interpretation was carried out. Works aimed at quality control of the obtained cross-correlation functions have been performed. We have identified considerable variations of the frequency-amplitude characteristics of the cross-correlation functions at small times, as well as significant shifts of the derived phases in large correlation times. Such variations of the cross-correlation patterns may indicate the existence of distinct time periods with different types of seismicity, as well as strong variations of mechanical properties of rocks. In turn, this might be an evidence for the ongoing activity of the magmatic system beneath the Kambalny volcano.","PeriodicalId":190530,"journal":{"name":"Russian Journal of Geophysical Technologies","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115341095","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 : 2020-12-17DOI: 10.18303/2619-1563-2020-2-18
G. Dugarov, R. K. Bekrenev, T. Nefedkina
The paper considers an algorithm for calculating reflection coefficients from boundary between two HTI media. Analysis of the presence of anisotropy above and below the target boundary, as well as variations in the parameters of HTI media, was done. Interpretation of reflection data from the boundary between two HTI media with neglect of anisotropy above or below potentially leads to significant errors in estimation of symmetry axes directions, and hence fracturing orientation. Overestimation/underestimation of an elastic parameter in the overlying HTI medium could lead to a corresponding overestimation/underestimation of similar parameter in the underlying target layer in the result of AVAZ inversion. Furthermore, among the anisotropy parameters Thomsen parameter γ has most significant influence on the reflection coefficients dependences. Thus, the parameter γ could be used foremost as a result of the AVAZ inversion.
{"title":"Study of the influence of anisotropy parameters on reflection coefficients from a boundary between two azimuthally anisotropic media","authors":"G. Dugarov, R. K. Bekrenev, T. Nefedkina","doi":"10.18303/2619-1563-2020-2-18","DOIUrl":"https://doi.org/10.18303/2619-1563-2020-2-18","url":null,"abstract":"The paper considers an algorithm for calculating reflection coefficients from boundary between two HTI media. Analysis of the presence of anisotropy above and below the target boundary, as well as variations in the parameters of HTI media, was done. Interpretation of reflection data from the boundary between two HTI media with neglect of anisotropy above or below potentially leads to significant errors in estimation of symmetry axes directions, and hence fracturing orientation. Overestimation/underestimation of an elastic parameter in the overlying HTI medium could lead to a corresponding overestimation/underestimation of similar parameter in the underlying target layer in the result of AVAZ inversion. Furthermore, among the anisotropy parameters Thomsen parameter γ has most significant influence on the reflection coefficients dependences. Thus, the parameter γ could be used foremost as a result of the AVAZ inversion.","PeriodicalId":190530,"journal":{"name":"Russian Journal of Geophysical Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115380357","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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