Pub Date : 1900-01-01DOI: 10.22564/16cisbgf2019.177
Klaus Contiero, L. Diogo
Automation of human activities through computational methods is essential in today's world, whether in the academic world, in the corporate world or in everyday tasks, and in geophysical processing is not different. Much of the time spent processing a shallow refraction seismic study is spent on picking for first break identification, which, despite technological advances, remains dependent on the visual evaluation of the seismic interpreter. Thus, the automation of this process provides a more efficient result and provides more time for interpretation. In this work we used the peak detection program (Zscore). The application of the Z-score showed automatic picking efficiency, identifying 88% of the first breaks, with 92% of the detections having an error less or equal to 2%. In addition, a method for interpreting seismic events, identifying the velocities and thicknesses of the layers, was successful: Simultaneous Inversion. Thus, several automations in the processes of the seismic refraction method have proved to be satisfactory in real data.
{"title":"Shallow Seismic Refraction - Identification and Automatic Interpretation of Arrival Times","authors":"Klaus Contiero, L. Diogo","doi":"10.22564/16cisbgf2019.177","DOIUrl":"https://doi.org/10.22564/16cisbgf2019.177","url":null,"abstract":"Automation of human activities through computational methods is essential in today's world, whether in the academic world, in the corporate world or in everyday tasks, and in geophysical processing is not different. Much of the time spent processing a shallow refraction seismic study is spent on picking for first break identification, which, despite technological advances, remains dependent on the visual evaluation of the seismic interpreter. Thus, the automation of this process provides a more efficient result and provides more time for interpretation. In this work we used the peak detection program (Zscore). The application of the Z-score showed automatic picking efficiency, identifying 88% of the first breaks, with 92% of the detections having an error less or equal to 2%. In addition, a method for interpreting seismic events, identifying the velocities and thicknesses of the layers, was successful: Simultaneous Inversion. Thus, several automations in the processes of the seismic refraction method have proved to be satisfactory in real data.","PeriodicalId":332941,"journal":{"name":"Proceedings of the 16th International Congress of the Brazilian Geophysical Society&Expogef","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121805777","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 : 1900-01-01DOI: 10.22564/16cisbgf2019.018
J. Nobre, A. Freire, C. Silva
Present work consists in the measurement of the total and spectral gamma radiation of cutting samples from a well located at the Parque dos Gaviões Gas field, Parnaíba Basin, NE Brazil. Here, we propose to perform tests in the well 3-PGN-5-MA from three different acquisition times in order to evaluate the accuracy of measurements by comparing and calibrating with the total gamma ray curve acquired directly in the open hole. If we succeed with these measurements, an important working tool opens up, since it will be possible to have the spectral measurement of the natural radiation based on cutting samples, representing optimization especially in the initial phases of drilling, where logging is not performed in some cases, as well as promoting subsidies for paleoenvironmental discussions.
目前的工作包括测量位于巴西东北部Parnaíba盆地Parque dos Gaviões气田的一口井的切割样品的总伽马辐射和光谱伽马辐射。在这里，我们建议在3-PGN-5-MA井中进行三次不同采集时间的测试，通过与直接在裸眼井中获得的总伽马射线曲线进行比较和校准，以评估测量的准确性。如果我们成功地进行了这些测量，一个重要的工作工具就打开了，因为它将有可能基于切割样本进行自然辐射的光谱测量，这代表了优化，特别是在钻探的初始阶段，在某些情况下不进行测井，同时也促进了对古环境讨论的补贴。
{"title":"A test of gamma-spectrometry in well-cuttings for paleoenvironmental and depositional studies on the Parque dos Gaviões Gas Field, Parnaíba Basin, Brazil","authors":"J. Nobre, A. Freire, C. Silva","doi":"10.22564/16cisbgf2019.018","DOIUrl":"https://doi.org/10.22564/16cisbgf2019.018","url":null,"abstract":"Present work consists in the measurement of the total and spectral gamma radiation of cutting samples from a well located at the Parque dos Gaviões Gas field, Parnaíba Basin, NE Brazil. Here, we propose to perform tests in the well 3-PGN-5-MA from three different acquisition times in order to evaluate the accuracy of measurements by comparing and calibrating with the total gamma ray curve acquired directly in the open hole. If we succeed with these measurements, an important working tool opens up, since it will be possible to have the spectral measurement of the natural radiation based on cutting samples, representing optimization especially in the initial phases of drilling, where logging is not performed in some cases, as well as promoting subsidies for paleoenvironmental discussions.","PeriodicalId":332941,"journal":{"name":"Proceedings of the 16th International Congress of the Brazilian Geophysical Society&Expogef","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122101489","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 : 1900-01-01DOI: 10.22564/16cisbgf2019.105
D. Grana
{"title":"Predicting, sampling, or optimizing the spatial distribution of petrophysical properties from seismic data","authors":"D. Grana","doi":"10.22564/16cisbgf2019.105","DOIUrl":"https://doi.org/10.22564/16cisbgf2019.105","url":null,"abstract":"","PeriodicalId":332941,"journal":{"name":"Proceedings of the 16th International Congress of the Brazilian Geophysical Society&Expogef","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116535650","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 : 1900-01-01DOI: 10.22564/16cisbgf2019.314
P. Fontana, M. Rocke
{"title":"Near-field measurements versus far-field estimations of air gun array sound pressure levels and sound exposure levels for blended source acquisition","authors":"P. Fontana, M. Rocke","doi":"10.22564/16cisbgf2019.314","DOIUrl":"https://doi.org/10.22564/16cisbgf2019.314","url":null,"abstract":"","PeriodicalId":332941,"journal":{"name":"Proceedings of the 16th International Congress of the Brazilian Geophysical Society&Expogef","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116644559","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 : 1900-01-01DOI: 10.22564/16cisbgf2019.299
T. M. Castro, W. Lupinacci
Pre-salt carbonates of the Santos Basin represent many challenges in the characterization of their reservoirs. This paper proposes the reservoir characterization of the Barra Velha and Itapema Formations based on the analysis of geophysical well logs, highlighting the influence of fine-grains presence. In the analyzed well, the results show that the Itapema and Barra Velha Formations are the exploratory targets in the Buzios Field. The Itapema Fm is less influenced by the occurrence of fine-grains, and presents better permo-porous characteristics than in the Barra Velha Fm. The presence of fine-grains causes a great negative impact on the Barra Velha Fm reservoir, affecting substantially the response of the well logs and compromising the reservoir quality. Due to this behavior, we propose the Barra Velha Fm sag phase division into Lower Sag and Upper Sag. This division is grounded at the end of fine-grain deposition. In its turn, the intra-Alagoas unconformity which separates the Upper Rift phase from the Sag phase, in the well logs, was correlated with the beginning of fine-grains deposition.
{"title":"Evaluation of fine-grains in pre-salt reservoirs","authors":"T. M. Castro, W. Lupinacci","doi":"10.22564/16cisbgf2019.299","DOIUrl":"https://doi.org/10.22564/16cisbgf2019.299","url":null,"abstract":"Pre-salt carbonates of the Santos Basin represent many challenges in the characterization of their reservoirs. This paper proposes the reservoir characterization of the Barra Velha and Itapema Formations based on the analysis of geophysical well logs, highlighting the influence of fine-grains presence. In the analyzed well, the results show that the Itapema and Barra Velha Formations are the exploratory targets in the Buzios Field. The Itapema Fm is less influenced by the occurrence of fine-grains, and presents better permo-porous characteristics than in the Barra Velha Fm. The presence of fine-grains causes a great negative impact on the Barra Velha Fm reservoir, affecting substantially the response of the well logs and compromising the reservoir quality. Due to this behavior, we propose the Barra Velha Fm sag phase division into Lower Sag and Upper Sag. This division is grounded at the end of fine-grain deposition. In its turn, the intra-Alagoas unconformity which separates the Upper Rift phase from the Sag phase, in the well logs, was correlated with the beginning of fine-grains deposition.","PeriodicalId":332941,"journal":{"name":"Proceedings of the 16th International Congress of the Brazilian Geophysical Society&Expogef","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114758521","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 : 1900-01-01DOI: 10.22564/16cisbgf2019.157
Chao Wang, P. Farmer, David Yngist, J. Brittan, I. Jones, C. Calderón
{"title":"Preconditioned Reflection Full Waveform Inversion for Subsalt Modeling Building","authors":"Chao Wang, P. Farmer, David Yngist, J. Brittan, I. Jones, C. Calderón","doi":"10.22564/16cisbgf2019.157","DOIUrl":"https://doi.org/10.22564/16cisbgf2019.157","url":null,"abstract":"","PeriodicalId":332941,"journal":{"name":"Proceedings of the 16th International Congress of the Brazilian Geophysical Society&Expogef","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116840788","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 : 1900-01-01DOI: 10.22564/16cisbgf2019.054
M. taniyama, João Andrade dos Reis Júnior, G. Duarte, D. Miranda
{"title":"Aplicação de técnicas de processamento de dados GPR para delimitação de infiltração de água em vazamento de tubulação em via urbana","authors":"M. taniyama, João Andrade dos Reis Júnior, G. Duarte, D. Miranda","doi":"10.22564/16cisbgf2019.054","DOIUrl":"https://doi.org/10.22564/16cisbgf2019.054","url":null,"abstract":"","PeriodicalId":332941,"journal":{"name":"Proceedings of the 16th International Congress of the Brazilian Geophysical Society&Expogef","volume":"616 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116342603","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 : 1900-01-01DOI: 10.22564/16cisbgf2019.180
L. Vergne, M. Porsani
Using the methods of deconvolution it was possible to reach the objective of delimiting the reflections obtained by the seismogram, improving the temporal resolution. The following deconvolutions were used: Wiener deconvolution (spike), adaptive deconvolution, and Lp norm deconvolution. Among the deconvolutions used, it was established which one showed the best result after application of the SRME filtering method in the seismic flow, where the effects of the surface multiple should be smoothed in the marine data of the Jequitinhonha Basin, making it possible to obtain a better seismic section closer to the subsurface geological reality of the study area.
{"title":"The Influence of Deconvolution on Surface-Related Multiple Elimination Filtering","authors":"L. Vergne, M. Porsani","doi":"10.22564/16cisbgf2019.180","DOIUrl":"https://doi.org/10.22564/16cisbgf2019.180","url":null,"abstract":"Using the methods of deconvolution it was possible to reach the objective of delimiting the reflections obtained by the seismogram, improving the temporal resolution. The following deconvolutions were used: Wiener deconvolution (spike), adaptive deconvolution, and Lp norm deconvolution. Among the deconvolutions used, it was established which one showed the best result after application of the SRME filtering method in the seismic flow, where the effects of the surface multiple should be smoothed in the marine data of the Jequitinhonha Basin, making it possible to obtain a better seismic section closer to the subsurface geological reality of the study area.","PeriodicalId":332941,"journal":{"name":"Proceedings of the 16th International Congress of the Brazilian Geophysical Society&Expogef","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116583122","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 : 1900-01-01DOI: 10.22564/16cisbgf2019.121
A. Barbosa, M. Bologna
{"title":"Preliminary Results from a Magnetotelluric Transect Across the Northern Paraguay Belt","authors":"A. Barbosa, M. Bologna","doi":"10.22564/16cisbgf2019.121","DOIUrl":"https://doi.org/10.22564/16cisbgf2019.121","url":null,"abstract":"","PeriodicalId":332941,"journal":{"name":"Proceedings of the 16th International Congress of the Brazilian Geophysical Society&Expogef","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121597597","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 : 1900-01-01DOI: 10.22564/16cisbgf2019.213
Mohammad Al-lahham, A. Carrasquilla
The selection of artificial intelligence (AI) techniques in the petroleum industry is very efficient because it will have a direct impact on the outcome of the study and the future use of the operation. In this study, we discuss the efficiency of the AI techniques by verification the results of permeability of a lower Albian carbonate reservoir of Campos Basin using the Winland method and cluster analysis. The permeability measured by AI techniques as fuzzy logic (FL), artificial neural network (ANN) and genetic algorithm (GA) were applied in three wells, being the first used for learning and the others as blind tests. Well logs are gamma ray, density, sonic, neutron porosity and SDR permeability logs. ANN obtained better performance compared to the FL, but the results have become better with GA. Employing artificial intelligence (AI) modern techniques together with a dataset composed by well logs, lithological information and sample laboratory measurements of permeability and porosity.
{"title":"Evaluation of the efficiency of artificial intelligence techniques of permeability results of a lower Albian carbonate reservoir of Campos Basin using the Winland method and cluster analysis","authors":"Mohammad Al-lahham, A. Carrasquilla","doi":"10.22564/16cisbgf2019.213","DOIUrl":"https://doi.org/10.22564/16cisbgf2019.213","url":null,"abstract":"The selection of artificial intelligence (AI) techniques in the petroleum industry is very efficient because it will have a direct impact on the outcome of the study and the future use of the operation. In this study, we discuss the efficiency of the AI techniques by verification the results of permeability of a lower Albian carbonate reservoir of Campos Basin using the Winland method and cluster analysis. The permeability measured by AI techniques as fuzzy logic (FL), artificial neural network (ANN) and genetic algorithm (GA) were applied in three wells, being the first used for learning and the others as blind tests. Well logs are gamma ray, density, sonic, neutron porosity and SDR permeability logs. ANN obtained better performance compared to the FL, but the results have become better with GA. Employing artificial intelligence (AI) modern techniques together with a dataset composed by well logs, lithological information and sample laboratory measurements of permeability and porosity.","PeriodicalId":332941,"journal":{"name":"Proceedings of the 16th International Congress of the Brazilian Geophysical Society&Expogef","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121627413","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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