10th Congress of the Balkan Geophysical Society最新文献_第3页

The april 2017 MS5.2 kurbneshi earthquake and its seismogenic zone 2017年4月库尔布内什MS5.2级地震及其发震带

10th Congress of the Balkan Geophysical Society Pub Date : 2019-09-18 DOI: 10.3997/2214-4609.201902650

R. Ormeni, I. Hoxha

引用次数: 1

Indexing of ULF/ELF electromagnetic emissions as a health and life quality factor 极低频/极低频电磁辐射作为健康和生活质量因素的索引

10th Congress of the Balkan Geophysical Society Pub Date : 2019-09-18 DOI: 10.3997/2214-4609.201902637

D. Teodosiev, P. Nenovski, M. Chamati, D. Borisova, T. Nikolova

引用次数: 0

Regional mapping of geophysical and geological data in the process of their integrated analysis and interpretation 区域填图是对地球物理和地质资料进行综合分析和解释的过程

10th Congress of the Balkan Geophysical Society Pub Date : 2019-09-18 DOI: 10.3997/2214-4609.201902632

P. Stavrev, S. Dimovski, A. Kisyov, P. Trifonova, M. Metodiev

引用次数: 1

Lithofacies identification using anisotropic parameters from logging data:A case study on Muglad Basin, South Sudan 利用测井资料的各向异性参数识别岩相——以南苏丹Muglad盆地为例

10th Congress of the Balkan Geophysical Society Pub Date : 2019-09-18 DOI: 10.3997/2214-4609.201902646

S. Jang, W. Deng, S. Hwang, D. Lee

{"title":"Lithofacies identification using anisotropic parameters from logging data:A case study on Muglad Basin, South Sudan","authors":"S. Jang, W. Deng, S. Hwang, D. Lee","doi":"10.3997/2214-4609.201902646","DOIUrl":"https://doi.org/10.3997/2214-4609.201902646","url":null,"abstract":"Summary The formation identification of reservoirs using seismic reflection data and log data for anisotropic reservoirs has tendencies in differences to the true formation. Considering on the anisotropic parameters is the one of methods for reducing this difference. For the reservoir formation discrimination of lithofacies, surface geological survey, geophysical exploration, drill core, and log data are analysed. In this study we tried to find out anisotropic parameters from log data using Backus averaging, then applied it to lithofacies discrimination. We calculated Lame’s constant and shear modulus from the log data in the Muglad Basin. After applying Backus averaging to these, we obtained the stiffness coefficients then calculated the anisotropic parameters. The lithofacies for reservoirs were classified by 11 layers based on the anisotropic parameters. If there is no drill core data or drilling-cuttings, the anisotropic parameters from log data is efficient for lithofacies discrimination. The classification of sedimentary layers without drill core or drill-cuttings, this approach will be useful for discrimination of lithofacies using anisotropic parameters from Vp, Vs and density log.","PeriodicalId":134345,"journal":{"name":"10th Congress of the Balkan Geophysical Society","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133833713","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}

引用次数: 0

Virtual Seismological Network of Sofia University - a research database 索非亚大学虚拟地震台网-一个研究数据库

10th Congress of the Balkan Geophysical Society Pub Date : 2019-09-18 DOI: 10.3997/2214-4609.201902670

L. Dimova, R. Raykova, L. Dimitrova, M. Tsekov

引用次数: 0

Velocity model building — key issue for seismic migration process 速度模型的建立——地震偏移过程的关键问题

10th Congress of the Balkan Geophysical Society Pub Date : 2019-09-18 DOI: 10.3997/2214-4609.201902625

M. Grigorova

{"title":"Velocity model building — key issue for seismic migration process","authors":"M. Grigorova","doi":"10.3997/2214-4609.201902625","DOIUrl":"https://doi.org/10.3997/2214-4609.201902625","url":null,"abstract":"Summary Prestack Kirchhoff Time Migration (PSTM) is probably the most used method for obtaining proper image of complex subsurface. In areas of rapid lateral and vertical velocity changes, energy is dispersed in such a way that it is very complicated to be provide desired resolution of the data. The PSTM focuses scattered energy by moving it to a proper subsurface position if accurate velocity model is provided for migration. Only when energy is properly focused, stacking improves the quality of signals and eliminates noise. Building such velocity model, can bring significant improvement of seismic data quality (both resolution and continuity) and proper spatial structural positioning. For these reasons, velocity estimation process has great influence in seismic imaging. The process of moving seismic events to their actual location of occurrence in the subsurface is strongly dependant on the velocity model, but also is greatly affected of the whole processing quality. Seismic processing is long and comprehensive process of converting seismic field data into a meaningful seismic section and involves a lot of steps of data manipulations. The result is a high quality time image of the subsurface which better matches to the real geologic structures.","PeriodicalId":134345,"journal":{"name":"10th Congress of the Balkan Geophysical Society","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130019097","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}

引用次数: 0

Seawater intrusion in the Alepu protected area, part of the Ropotamo complex (Southern Bulgaria) 海水入侵阿勒普保护区，Ropotamo综合体的一部分(保加利亚南部)

10th Congress of the Balkan Geophysical Society Pub Date : 2019-09-18 DOI: 10.3997/2214-4609.201902635

N. Stoyanov, S. Dimovski, A. Kisyov

引用次数: 2

Integrated Approach for Pre-drill Pore Pressure Prediction in Data-limited Exploration Area—A Case Study from Offshore Myanmar 数据有限勘探区钻前孔隙压力综合预测方法——以缅甸近海为例

10th Congress of the Balkan Geophysical Society Pub Date : 2019-09-18 DOI: 10.3997/2214-4609.201902624

A. Sakulraungsri, P. Boonyasatphan, K. Rungsai, S. Sa-nguanphon, P. Som-in, Vitoon Chaisomboonpan, H. Sognnes, J. Iamboon

{"title":"Integrated Approach for Pre-drill Pore Pressure Prediction in Data-limited Exploration Area—A Case Study from Offshore Myanmar","authors":"A. Sakulraungsri, P. Boonyasatphan, K. Rungsai, S. Sa-nguanphon, P. Som-in, Vitoon Chaisomboonpan, H. Sognnes, J. Iamboon","doi":"10.3997/2214-4609.201902624","DOIUrl":"https://doi.org/10.3997/2214-4609.201902624","url":null,"abstract":"Summary In Basement-high Area, Gulf of Moattama Basin, Myanmar, the geological setting is complex. A significant change in tectonostratigraphy setting across the area leads to different sedimentation and thermal maturation of the source rock, thereby highly variable subsurface pore pressure with undetermined mechanism occurred. Even though drillability of exploration wells depends crucially on a precise pore pressure prediction, the estimation of such pressure is problematic due to the lack of primary dataset. To ensure reliability, the assessment of pre-drill pore pressure and fracture gradient illustrated herein is performed by an integrated approach. Interval velocity from broadband seismic, borehole geophysical dataset, 3-D heat-flow model, and basin history analysis were taken into account during the course of the model construction. Additionally, to handle the prediction in this complicated geology setting, comprehensive geological interpretation was included and has shown the usefulness for validating the output and quantifying the sensible range of uncertainty.","PeriodicalId":134345,"journal":{"name":"10th Congress of the Balkan Geophysical Society","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130874936","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}

引用次数: 0

Absolute magnetic measurements, methods, and instrumentation 绝对磁测量，方法和仪器

10th Congress of the Balkan Geophysical Society Pub Date : 2019-09-18 DOI: 10.3997/2214-4609.201902622

Á. Domján, L. Hegymegi, C. Hegymegi

{"title":"Absolute magnetic measurements, methods, and instrumentation","authors":"Á. Domján, L. Hegymegi, C. Hegymegi","doi":"10.3997/2214-4609.201902622","DOIUrl":"https://doi.org/10.3997/2214-4609.201902622","url":null,"abstract":"Summary Absolute geomagnetic measurement is an accurate determination of magnetic declination D and inclination I at a given location and time on the Earth. These quantities are essential to monitor the long-term baseline changes and calibration parameters of variometers in observatories and repeat station surveys. Methods and the instrumentation are tightly coupled to this kind of measurement. Since all the relevant methods based on the usage of a classical theodolite equipped with one-axis magnetometer known as declination inclination magnetometer (DIM). DIMs have several difficulties. Measurement process is carried out manually. Difficult to use DIM for I observation in equatorial region because the microscope cannot be read in nearly vertical position even with diagonal eyepiece. The computation of magnetic meridian is calculated by the operator during the measurements. To overcome this problem at MinGeo company we developed a cable-less, digital, non-magnetic DIM instrument, named as FluxSet Declination Inclination Digital Station (DS), which was designed to facilitate the absolute magnetic measurements. The aim of this presentation to asses the accuracy and precision of the absolute magnetic measurements, which were measured by some reference DIMs and DS instrument using null and this new proposed method.","PeriodicalId":134345,"journal":{"name":"10th Congress of the Balkan Geophysical Society","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123085670","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}

引用次数: 0

Digital terrain model of the seafloor of south bulgarian black sea coast 保加利亚南部黑海海岸海底数字地形模型

10th Congress of the Balkan Geophysical Society Pub Date : 2019-09-18 DOI: 10.3997/2214-4609.201902665

T. Lambev, B. Prodanov

{"title":"Digital terrain model of the seafloor of south bulgarian black sea coast","authors":"T. Lambev, B. Prodanov","doi":"10.3997/2214-4609.201902665","DOIUrl":"https://doi.org/10.3997/2214-4609.201902665","url":null,"abstract":"Summary The paper discuss the creation of a composite seafloor digital terrain model of the south Bulgarian Black Sea coast - broad Burgas Bay from Cape Emine to Cape Maslen nos. It is a result of processing and assembling data from single beam echosounder and multibeam sonar systems derived from the Institute of Oceanology-BAS, bathymetric LiDAR data and data from digitizing water lines from marine navigational charts. Data from single beam echosounder and multibeam sonar systems were acquired during the implementation of various national and international projects of IO-BAS. Areas where no data are available were completed by manually drown isobaths built on the grounds of the surrounding terrain and circular interpolation with step of 55 meters. By combining all the data a comprehensive 3D digital terrain model of the topography of the seafloor with resolution of 1/128 arc minute or cell size of 14 meters was created. The digital terrain model allows detailed understanding of the seafloor morphology and successfully can be used in the compilation of highly accurate, navigational charts. The work is a result of the implementation of a project under the Program for supporting young scientists and PhD students at the Bulgarian Academy of Sciences.","PeriodicalId":134345,"journal":{"name":"10th Congress of the Balkan Geophysical Society","volume":"2014 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127510322","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}

引用次数: 3