Pub Date : 2019-06-03DOI: 10.3997/2214-4609.201900967
G. Bancalà, L. Luca, S. Ratti, E. Mattos
Summary The Chihuahua trough is a Mesozoic sedimentary basin located along the southwestern margin of the North American Craton in northeastern Mexico. Its long and complex tectonic evolution, coupled with a limited history of exploration in the region, has left many unanswered questions about its geodynamical evolution, basement relief, and stratigraphy. This under-explored geological province has neither the high-quality structural data nor the quantitative models necessary to plan future exploration work. A dedicated workflow was applied with the objective to investigate from regional to basin understanding in the Chihuahua area by means of integrating seismci and potential field data, in which, for the first time, the interpretation of the latter anticipated interpreting the seismic data and it provided an uplift to the geological understanding of the area of interest.
{"title":"Multiscale Modelling and Integrated Interpretation of Potential Field and Seismic Data Onshore Mexico","authors":"G. Bancalà, L. Luca, S. Ratti, E. Mattos","doi":"10.3997/2214-4609.201900967","DOIUrl":"https://doi.org/10.3997/2214-4609.201900967","url":null,"abstract":"Summary The Chihuahua trough is a Mesozoic sedimentary basin located along the southwestern margin of the North American Craton in northeastern Mexico. Its long and complex tectonic evolution, coupled with a limited history of exploration in the region, has left many unanswered questions about its geodynamical evolution, basement relief, and stratigraphy. This under-explored geological province has neither the high-quality structural data nor the quantitative models necessary to plan future exploration work. A dedicated workflow was applied with the objective to investigate from regional to basin understanding in the Chihuahua area by means of integrating seismci and potential field data, in which, for the first time, the interpretation of the latter anticipated interpreting the seismic data and it provided an uplift to the geological understanding of the area of interest.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85672799","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 : 2019-06-03DOI: 10.3997/2214-4609.201900742
M. Etchebes, A. Bounaim, T. Brenna, D. Steckhan
Summary This paper presents a set of 3D-based automated solutions that has been designed to maximize the use of seismic data to characterize structurally complex reservoirs by providing structural properties such as fault distribution, geometry, throw, fault-related rock deformation and a prognosis of fractured zone intersecting the planned well's trajectory. Such information and its associated uncertainties are critical since they can greatly improve the decision-making process while drilling as well as improve the planning of new wells in structurally complex reservoirs.
{"title":"Fault Characterization Using Advanced Seismic Interpretation Techniques–Quantitative Input for Optimal Well Placement in Structurally Complex Reservoirs","authors":"M. Etchebes, A. Bounaim, T. Brenna, D. Steckhan","doi":"10.3997/2214-4609.201900742","DOIUrl":"https://doi.org/10.3997/2214-4609.201900742","url":null,"abstract":"Summary This paper presents a set of 3D-based automated solutions that has been designed to maximize the use of seismic data to characterize structurally complex reservoirs by providing structural properties such as fault distribution, geometry, throw, fault-related rock deformation and a prognosis of fractured zone intersecting the planned well's trajectory. Such information and its associated uncertainties are critical since they can greatly improve the decision-making process while drilling as well as improve the planning of new wells in structurally complex reservoirs.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85882945","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 : 2019-06-03DOI: 10.3997/2214-4609.201901378
D. Lu, J. Gao, D. Chen, H. Chen, Q. Wang
In reflection seismology, seismic wavelet estimation is of great significance for high resolution reflectivity inversion. The method for wavelet estimation can be classified into two categories. One is deterministic and the other is statistic. For the latter, a conventional method uses a spectrum fitting method to estimate the seismic wavelet. The commonly used methods are correlation-based method, the log-spectrum-averaging method and spectrum-shaping method. All of these methods assume that the reflection coefficient sequence (RCS) is white and the source wavelets are zero-phase which may not be valid under certain conditions. In this paper, we propose a new approach to obtain the seismic wavelet based on deep neural network (DNN). We compare the wavelet obtained by our method with the wavelet obtained by widely used spectrum modeling method. Then, the obtained wavelet is applied to perform the inversion of the RCS using the HPP algorithm. Compared with the conventional method, DNN can achieve a more accurate wavelet even if source wavelet is not zero-phase. The resolution of reflectivity inversion is significantly enhanced by using the obtained wavelet.
{"title":"Extraction of the Seismic Wavelet Based on Deep Neural Networks","authors":"D. Lu, J. Gao, D. Chen, H. Chen, Q. Wang","doi":"10.3997/2214-4609.201901378","DOIUrl":"https://doi.org/10.3997/2214-4609.201901378","url":null,"abstract":"In reflection seismology, seismic wavelet estimation is of great significance for high resolution reflectivity inversion. The method for wavelet estimation can be classified into two categories. One is deterministic and the other is statistic. For the latter, a conventional method uses a spectrum fitting method to estimate the seismic wavelet. The commonly used methods are correlation-based method, the log-spectrum-averaging method and spectrum-shaping method. All of these methods assume that the reflection coefficient sequence (RCS) is white and the source wavelets are zero-phase which may not be valid under certain conditions. In this paper, we propose a new approach to obtain the seismic wavelet based on deep neural network (DNN). We compare the wavelet obtained by our method with the wavelet obtained by widely used spectrum modeling method. Then, the obtained wavelet is applied to perform the inversion of the RCS using the HPP algorithm. Compared with the conventional method, DNN can achieve a more accurate wavelet even if source wavelet is not zero-phase. The resolution of reflectivity inversion is significantly enhanced by using the obtained wavelet.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85951703","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 : 2019-06-03DOI: 10.3997/2214-4609.201900901
S. Grohmann, F. Nader, M. Romero-Sarmiento, F. Baudin, R. Littke
Summary In order to better understand petroleum systems in the eastern Mediterranean Sea, an integrated approach is presented to characterize potential source rocks by means of organic geochemistry and stratigraphic forward modeling. Upper Cretaceous and Upper Eocene organic matter-rich deposits were found in the OPD Leg 160 boreholes along the Eratosthenes Seamount, south of Cyprus and within the Upper Miocene strata onshore Cyprus. The geochemical results indicate a mainly marine type of organic matter that was deposited as a result of upwelling systems above the seamount. Onshore, nutrients were derived together with clastic material, leading to increased bio-productivity. These results together with literature data for Cretaceous source rocks along the Levant Margin were the base for a large scale stratigraphic forward model, which was used to simulate the distribution of different sediments including organic matter within the respective intervals. The simulations could reproduce organic matter-rich deposits along the Levant margin as well as on top of the Eratosthenes Seamount. The simulated intervals are in accordance with published facies maps and show relatively small thickness errors compared to depth-converted seismic horizons. These models can provide valuable process-based facies input parameters for petroleum system modelling.
为了更好地认识东地中海含油气系统，提出了一种综合的有机地球化学和地层正演模拟方法来表征潜在烃源岩。沿塞浦路斯南部Eratosthenes海山和塞浦路斯陆上上中新世地层，在OPD Leg 160钻孔中发现了上白垩统和上始新统富含有机质的矿床。地球化学结果表明，海山上方的上升流系统沉积了以海相为主的有机质。在陆地上，营养物质与碎屑物质一起产生，从而提高了生物生产力。这些结果结合黎凡特边缘白垩系烃源岩的文献资料，为建立大尺度地层正演模型奠定了基础，并用于模拟不同层段内不同沉积物(包括有机质)的分布。模拟可以重现黎凡特边缘和埃拉托色尼海底山顶部富含有机质的沉积物。模拟的层段与已发表的相图一致，与深度转换的地震层相比，厚度误差相对较小。这些模型可以为油气系统建模提供有价值的基于过程的相输入参数。
{"title":"An Integrated Approach for Characterizing Source Rocks in Frontier Hydrocarbon Basins by Organic Geochemical Analyses and Stratigraphic Forward Modeling: the Case of the Eastern Mediterranean Region","authors":"S. Grohmann, F. Nader, M. Romero-Sarmiento, F. Baudin, R. Littke","doi":"10.3997/2214-4609.201900901","DOIUrl":"https://doi.org/10.3997/2214-4609.201900901","url":null,"abstract":"Summary In order to better understand petroleum systems in the eastern Mediterranean Sea, an integrated approach is presented to characterize potential source rocks by means of organic geochemistry and stratigraphic forward modeling. Upper Cretaceous and Upper Eocene organic matter-rich deposits were found in the OPD Leg 160 boreholes along the Eratosthenes Seamount, south of Cyprus and within the Upper Miocene strata onshore Cyprus. The geochemical results indicate a mainly marine type of organic matter that was deposited as a result of upwelling systems above the seamount. Onshore, nutrients were derived together with clastic material, leading to increased bio-productivity. These results together with literature data for Cretaceous source rocks along the Levant Margin were the base for a large scale stratigraphic forward model, which was used to simulate the distribution of different sediments including organic matter within the respective intervals. The simulations could reproduce organic matter-rich deposits along the Levant margin as well as on top of the Eratosthenes Seamount. The simulated intervals are in accordance with published facies maps and show relatively small thickness errors compared to depth-converted seismic horizons. These models can provide valuable process-based facies input parameters for petroleum system modelling.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76840032","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 : 2019-06-03DOI: 10.3997/2214-4609.201901462
W. Jaluakbar, I. S. Putra
Summary In the last decade, volatility of oil prices has increased rapidly. Dealing with high default risk conditions, increased volatility and a downward trend in oil prices since 2015, oil and gas companies are advised to hold on to the mantra of capital discipline (cost reduction, standardization, collaboration) and refocus investment and efforts on asset maintenance. On the other hand, the oil and gas industry in Indonesia is one of the source of state revenues and as a provider of basic energy needs for economic growth. The decrease in upstream oil and gas investment is a bad signal for the country's budget and energy in the future. Declining production levels (marginal fields and no significant new discoveries) are the main causes of this problem. Oil imports as a solution to the deficit is a poor signal both national energy security and exchange rate stability. For this reason, the Indonesian government needs giant discoveries as one of the solutions for the above problems. With all above reason, the Government of Indonesia need to take a corrective and make improvisation actions in order to provide incentives and improve existing investment climate to support massive exploration activities.
{"title":"Managing Non-Technical Risk in Upstream Oil and Gas Industry in Indonesia","authors":"W. Jaluakbar, I. S. Putra","doi":"10.3997/2214-4609.201901462","DOIUrl":"https://doi.org/10.3997/2214-4609.201901462","url":null,"abstract":"Summary In the last decade, volatility of oil prices has increased rapidly. Dealing with high default risk conditions, increased volatility and a downward trend in oil prices since 2015, oil and gas companies are advised to hold on to the mantra of capital discipline (cost reduction, standardization, collaboration) and refocus investment and efforts on asset maintenance. On the other hand, the oil and gas industry in Indonesia is one of the source of state revenues and as a provider of basic energy needs for economic growth. The decrease in upstream oil and gas investment is a bad signal for the country's budget and energy in the future. Declining production levels (marginal fields and no significant new discoveries) are the main causes of this problem. Oil imports as a solution to the deficit is a poor signal both national energy security and exchange rate stability. For this reason, the Indonesian government needs giant discoveries as one of the solutions for the above problems. With all above reason, the Government of Indonesia need to take a corrective and make improvisation actions in order to provide incentives and improve existing investment climate to support massive exploration activities.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"321 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76896522","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 : 2019-06-03DOI: 10.3997/2214-4609.201900667
C. Wu, H. Wang, J. Hu, F. Luo, S. Sheng
{"title":"Imaging Enhancement of Reverse Time Migration Using Dynamic Time Warping and Local Similarity","authors":"C. Wu, H. Wang, J. Hu, F. Luo, S. Sheng","doi":"10.3997/2214-4609.201900667","DOIUrl":"https://doi.org/10.3997/2214-4609.201900667","url":null,"abstract":"","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77021269","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 : 2019-06-03DOI: 10.3997/2214-4609.201900672
B. Witten, A. Booterbaugh, R. Segstro
{"title":"A Novel Array Acquisition and Processing Methodology for Microseismic Monitoring","authors":"B. Witten, A. Booterbaugh, R. Segstro","doi":"10.3997/2214-4609.201900672","DOIUrl":"https://doi.org/10.3997/2214-4609.201900672","url":null,"abstract":"","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"156 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77131367","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 : 2019-06-03DOI: 10.3997/2214-4609.201901667
M. Manzi, A. Malehmir, R. Durrheim
Summary The word “seismics” in the geoscience community is often used synonymously with “oil and gas”, despite its successes in other applications, for example, in mineral exploration, engineering application, mine planning and safety.Over the past few decades, the method has been developed and successfully used for mineral exploration, mine planning, and safety in “hard rock” metallogenic provinces worldwide (e.g., Australia, Europe, Canada, and South Africa), leading to the discovery of giant minerals and metal deposits.However, despite these successes, the method's capabilities in mining still remains less-known to many geoscientists and some mining companies are still reluctant to use it for “hard rock” exploration and mining.The purpose of this paper is to demonstrate how the reflection seismic method has been successfully used to explore and discover some of the world's largest mineral and metal deposits that are located deep underground - where exploration drilling is more costly and risky. A wide range of case studies from hard rock environments are covered, for example, from South Africa and Canada.
{"title":"The Value of Seismics in Mineral Exploration and Mine Safety","authors":"M. Manzi, A. Malehmir, R. Durrheim","doi":"10.3997/2214-4609.201901667","DOIUrl":"https://doi.org/10.3997/2214-4609.201901667","url":null,"abstract":"Summary The word “seismics” in the geoscience community is often used synonymously with “oil and gas”, despite its successes in other applications, for example, in mineral exploration, engineering application, mine planning and safety.Over the past few decades, the method has been developed and successfully used for mineral exploration, mine planning, and safety in “hard rock” metallogenic provinces worldwide (e.g., Australia, Europe, Canada, and South Africa), leading to the discovery of giant minerals and metal deposits.However, despite these successes, the method's capabilities in mining still remains less-known to many geoscientists and some mining companies are still reluctant to use it for “hard rock” exploration and mining.The purpose of this paper is to demonstrate how the reflection seismic method has been successfully used to explore and discover some of the world's largest mineral and metal deposits that are located deep underground - where exploration drilling is more costly and risky. A wide range of case studies from hard rock environments are covered, for example, from South Africa and Canada.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81132760","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 : 2019-06-03DOI: 10.3997/2214-4609.201900664
Ø. Korsmo, A. Osen, A. Pankov, O. Sandstad
{"title":"Optimized and Cost-Efficient Visco-Acoustic Iterative Least-Squares Migration","authors":"Ø. Korsmo, A. Osen, A. Pankov, O. Sandstad","doi":"10.3997/2214-4609.201900664","DOIUrl":"https://doi.org/10.3997/2214-4609.201900664","url":null,"abstract":"","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83592178","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 : 2019-06-03DOI: 10.3997/2214-4609.201900883
S. Wang, Haiyang Li, D. Wang, S. Zhou
Summary This abstract extends the finite-difference contrast source inversion (FD-CSI) method to reconstruct the P-wave and S-wave velocity for two-dimensional elastic wave inversion in the framework of the full-waveform inversion. The FD-CSI method is an iterative nonlinear inversion method, which exhibits several strengths. First, the finite-difference operator only relies on the background media and the given frequency, both of which are unchanged during inversion. Therefore, the full forward problem is required to be solved only once at the beginning of the inversion process, which makes the method very computationally efficient and ideal for large-scale 3D inversion calculations. Another attractive feature of the inversion method is that it is with strong capability in dealing with nonlinear inverse problems in an inhomogeneous background medium, because a 25 points finite-difference operator is used to represent the differential operator governing the two-dimensional elastic wave propagation. Numerical reconstruction results show that the inversion method has an excellent performance for reconstructing P-wave and S-wave and can provide more accurate velocity information for seismic data processing and interpretation.
{"title":"Finite-Difference Contrast Source Inversion Method for Elastic Wave Equation","authors":"S. Wang, Haiyang Li, D. Wang, S. Zhou","doi":"10.3997/2214-4609.201900883","DOIUrl":"https://doi.org/10.3997/2214-4609.201900883","url":null,"abstract":"Summary This abstract extends the finite-difference contrast source inversion (FD-CSI) method to reconstruct the P-wave and S-wave velocity for two-dimensional elastic wave inversion in the framework of the full-waveform inversion. The FD-CSI method is an iterative nonlinear inversion method, which exhibits several strengths. First, the finite-difference operator only relies on the background media and the given frequency, both of which are unchanged during inversion. Therefore, the full forward problem is required to be solved only once at the beginning of the inversion process, which makes the method very computationally efficient and ideal for large-scale 3D inversion calculations. Another attractive feature of the inversion method is that it is with strong capability in dealing with nonlinear inverse problems in an inhomogeneous background medium, because a 25 points finite-difference operator is used to represent the differential operator governing the two-dimensional elastic wave propagation. Numerical reconstruction results show that the inversion method has an excellent performance for reconstructing P-wave and S-wave and can provide more accurate velocity information for seismic data processing and interpretation.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"75 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83601143","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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