Pub Date : 2023-11-01DOI: 10.3997/1365-2397.fb2023088
Wang Zongjun, MA Liangtao, Dong Hongchao
Seismic inversion is one of the main methods for reservoir prediction by integrating logging and seismic information, but the rationality of the prediction results is heavily dependent on the initial model. For offshore oil fields, limited by the sparse and non-uniform distributed wells, the initial model obtained by mathematical interpolation is often deviated from the actual reservoir distribution, especially for the complex sedimentary environment case. Sedimentary facies control can solve this problem to a certain extent, but it is easily affected by the subjective understanding. In this paper, a seismic inversion technology based on self-facies-control low-frequency model is studied, which can make full use of the horizontal identification and spatial structure to constrain the ability of seismic data. Based on the self-facies-control initial model, the pre-stack geostatistical inversion is suitable for non-parallel structure reservoir, and the inversion results highlight the reservoir spatial structure. The method effectively improves the spatial structure resolution of the inversion result, and achieved the ideal application effect in the actual oilfield. The predicted coincidence of sand bodies with thickness greater than 12 m is more than 85%, and the average drilling rate of sandstone in the horizontal section of the horizontal well is 92.77%.
{"title":"A Pre-Stack Inversion Method Based on a Self-Facies-Control Low-Frequency Model and its Application in Offshore Reservoirs","authors":"Wang Zongjun, MA Liangtao, Dong Hongchao","doi":"10.3997/1365-2397.fb2023088","DOIUrl":"https://doi.org/10.3997/1365-2397.fb2023088","url":null,"abstract":"Seismic inversion is one of the main methods for reservoir prediction by integrating logging and seismic information, but the rationality of the prediction results is heavily dependent on the initial model. For offshore oil fields, limited by the sparse and non-uniform distributed wells, the initial model obtained by mathematical interpolation is often deviated from the actual reservoir distribution, especially for the complex sedimentary environment case. Sedimentary facies control can solve this problem to a certain extent, but it is easily affected by the subjective understanding. In this paper, a seismic inversion technology based on self-facies-control low-frequency model is studied, which can make full use of the horizontal identification and spatial structure to constrain the ability of seismic data. Based on the self-facies-control initial model, the pre-stack geostatistical inversion is suitable for non-parallel structure reservoir, and the inversion results highlight the reservoir spatial structure. The method effectively improves the spatial structure resolution of the inversion result, and achieved the ideal application effect in the actual oilfield. The predicted coincidence of sand bodies with thickness greater than 12 m is more than 85%, and the average drilling rate of sandstone in the horizontal section of the horizontal well is 92.77%.","PeriodicalId":35692,"journal":{"name":"First Break","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135510663","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 : 2023-11-01DOI: 10.3997/1365-2397.fb2023091
Fabio Mancini, Ben Hollings, Giorgio Mangano, Dhimitraq Gjini, Damien Dieulangard, Ted Manning, Henry A. Debens
This article discusses the development of a novel marine seismic acquisition system that utilises a fleet of fully autonomous underwater vehicles (AUVs) as ocean-bottom nodes (OBNs). The primary objective is to eliminate remotely operated vehicles (ROVs) or use of ropes for the deployment and recovery of ocean-bottom seismic sensors, thereby enabling ocean-bottom seismic surveys that are significantly more efficient, cost-effective with improved environmental impact. This is achieved by developing buoyancy driven AUVs, which offer long endurance and are capable of self-locating to pre-determined positions without the need for any direct surface control. Additionally, the system proposed is designed for scalability, allowing for large inventories of AUVs to be deployed in parallel to satisfy the requirements of large-scale seismic surveys. This system is expected to service sub-surface imaging needs of both hydrocarbon business and emerging low carbon businesses such as CCS. This system will also permit a shift from dense source side to dense receiver side sampling, with a clear benefit to limit sound emission levels even as sampling density (and so data quality) increases.
{"title":"Advances in Seismic Acquisition: a Novel Approach Using Autonomous Underwater Gliding Nodes","authors":"Fabio Mancini, Ben Hollings, Giorgio Mangano, Dhimitraq Gjini, Damien Dieulangard, Ted Manning, Henry A. Debens","doi":"10.3997/1365-2397.fb2023091","DOIUrl":"https://doi.org/10.3997/1365-2397.fb2023091","url":null,"abstract":"This article discusses the development of a novel marine seismic acquisition system that utilises a fleet of fully autonomous underwater vehicles (AUVs) as ocean-bottom nodes (OBNs). The primary objective is to eliminate remotely operated vehicles (ROVs) or use of ropes for the deployment and recovery of ocean-bottom seismic sensors, thereby enabling ocean-bottom seismic surveys that are significantly more efficient, cost-effective with improved environmental impact. This is achieved by developing buoyancy driven AUVs, which offer long endurance and are capable of self-locating to pre-determined positions without the need for any direct surface control. Additionally, the system proposed is designed for scalability, allowing for large inventories of AUVs to be deployed in parallel to satisfy the requirements of large-scale seismic surveys. This system is expected to service sub-surface imaging needs of both hydrocarbon business and emerging low carbon businesses such as CCS. This system will also permit a shift from dense source side to dense receiver side sampling, with a clear benefit to limit sound emission levels even as sampling density (and so data quality) increases.","PeriodicalId":35692,"journal":{"name":"First Break","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135515111","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 : 2023-11-01DOI: 10.3997/1365-2397.fb2023089
Ahmed Bakr, Mohamed Reda, Mohamed Fathy
Summary The Kharita reservoir in Karam field is a prolific Early Cretaceous reservoir located in Badr El-Din concessions, Abu Gharadig Basin, Western Desert, Egypt. This reservoir is characterised by lateral and vertical variations in facies type, reservoir quality, connectivity and low gas recovery which in turn affect the efficiency of further exploitation in the Karam field. Herein, a 3D static reservoir model was conducted using multidisciplinary datasets to provide a comprehensive understanding of reservoir characteristics helping to optimise the strategies of hydrocarbon field development. The conducted well correlation reveals potentially multiple gas accumulations separated by a very low net-to-gross sequence. Two types of reservoir quality were interpreted: good-quality active distributary channels and poor tidal flat deposits. The different types of genetic facies have different property distribution and connectivity behaviours. Active distributary channels have higher connectivity than the tidally influenced channels and the tidal flat sands. The estimated initial gas in-place demonstrated that half of the gas volume is attributed to poor-quality sands which show very low productivity. This work procedure will lead to a more precise prediction of reservoir performance, and select the optimum subsurface development plan, including the location and number of infills required to increase the ultimate gas recovery.
{"title":"Application of 3D Static Modelling and Reservoir Characterisation for Optimal Field Development: a Case Study from the Kharita Formation, Karam Field, Western Desert, Egypt","authors":"Ahmed Bakr, Mohamed Reda, Mohamed Fathy","doi":"10.3997/1365-2397.fb2023089","DOIUrl":"https://doi.org/10.3997/1365-2397.fb2023089","url":null,"abstract":"Summary The Kharita reservoir in Karam field is a prolific Early Cretaceous reservoir located in Badr El-Din concessions, Abu Gharadig Basin, Western Desert, Egypt. This reservoir is characterised by lateral and vertical variations in facies type, reservoir quality, connectivity and low gas recovery which in turn affect the efficiency of further exploitation in the Karam field. Herein, a 3D static reservoir model was conducted using multidisciplinary datasets to provide a comprehensive understanding of reservoir characteristics helping to optimise the strategies of hydrocarbon field development. The conducted well correlation reveals potentially multiple gas accumulations separated by a very low net-to-gross sequence. Two types of reservoir quality were interpreted: good-quality active distributary channels and poor tidal flat deposits. The different types of genetic facies have different property distribution and connectivity behaviours. Active distributary channels have higher connectivity than the tidally influenced channels and the tidal flat sands. The estimated initial gas in-place demonstrated that half of the gas volume is attributed to poor-quality sands which show very low productivity. This work procedure will lead to a more precise prediction of reservoir performance, and select the optimum subsurface development plan, including the location and number of infills required to increase the ultimate gas recovery.","PeriodicalId":35692,"journal":{"name":"First Break","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135515766","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 : 2023-11-01DOI: 10.3997/1365-2397.fb2023096
Marc Rocke, Carsten Udengaard, David Brookes, Curt Schneider
The resistance of low-frequency seismic energy to scattering and absorption, and its resulting ability to be recorded over long ray paths through attenuating media is well established. This relative resistance to scattering and attenuation makes it vital for capturing information with depth and offset, both for model-building and illumination. There is likely to be no better example of this than modern long-offset OBN (ocean bottom node) surveys of the Gulf of Mexico – however the importance of high-quality low frequencies in unravelling imaging challenges below complex overburden such as shallow gas, carbonates, salt, and volcanics is well documented. Consequently, interest in recording low frequencies in the field extends beyond OBN surveys to include single-vessel and multi-vessel towed-streamer designs. We have seen strong focus on designing sources that produce rich low frequencies over the last decade as a result.
{"title":"The Increasing Appeal of Single-Element Pneumatic Point Sources","authors":"Marc Rocke, Carsten Udengaard, David Brookes, Curt Schneider","doi":"10.3997/1365-2397.fb2023096","DOIUrl":"https://doi.org/10.3997/1365-2397.fb2023096","url":null,"abstract":"The resistance of low-frequency seismic energy to scattering and absorption, and its resulting ability to be recorded over long ray paths through attenuating media is well established. This relative resistance to scattering and attenuation makes it vital for capturing information with depth and offset, both for model-building and illumination. There is likely to be no better example of this than modern long-offset OBN (ocean bottom node) surveys of the Gulf of Mexico – however the importance of high-quality low frequencies in unravelling imaging challenges below complex overburden such as shallow gas, carbonates, salt, and volcanics is well documented. Consequently, interest in recording low frequencies in the field extends beyond OBN surveys to include single-vessel and multi-vessel towed-streamer designs. We have seen strong focus on designing sources that produce rich low frequencies over the last decade as a result.","PeriodicalId":35692,"journal":{"name":"First Break","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135515757","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 : 2023-11-01DOI: 10.3997/1365-2397.fb2023090
Martin Widmaier, Carine Roalkvam, Okwudili Orji
Preview this article: Advanced 3D Seismic Crossover Technologies Between Hydrocarbon Exploration, CCS Development, and Offshore Wind, Page 1 of 1 < Previous page | Next page > /docserver/preview/fulltext/fb/41/11/fb2023090-1.gif
Pub Date : 2023-10-01DOI: 10.3997/1365-2397.fb2023083
Benjamin Durot
Preview this article: Interpretation of 3D UHRS to Emphasise Quaternary Glacial Structures in the Ten Noorden van de Waddeneilanden Wind Farm Zone, Page 1 of 1 < Previous page | Next page > /docserver/preview/fulltext/fb/41/10/fb2023083-1.gif
预览本文:Ten Noorden van de Waddeneilanden风电场区的3D UHRS解释以强调第四纪冰川结构，Page 1 of 1 <上一页|下一页> /docserver/ Preview /fulltext/fb/41/10/fb2023083-1.gif
{"title":"Interpretation of 3D UHRS to Emphasise Quaternary Glacial Structures in the Ten Noorden van de Waddeneilanden Wind Farm Zone","authors":"Benjamin Durot","doi":"10.3997/1365-2397.fb2023083","DOIUrl":"https://doi.org/10.3997/1365-2397.fb2023083","url":null,"abstract":"Preview this article: Interpretation of 3D UHRS to Emphasise Quaternary Glacial Structures in the Ten Noorden van de Waddeneilanden Wind Farm Zone, Page 1 of 1 < Previous page | Next page > /docserver/preview/fulltext/fb/41/10/fb2023083-1.gif","PeriodicalId":35692,"journal":{"name":"First Break","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134977229","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 : 2023-10-01DOI: 10.3997/1365-2397.fb2023082
Jordan Bos, Nick Tranter, Ben Turner, Guy Drijkoningen
Reducing carbon emissions and minimising land disturbances are key motivators to use innovations for onshore seismic acquisition. Seismic Mechatronics B V, through its fully battery-powered electric seismic source, has now enabled zero carbon-emission from vibrators and project vehicles during seismic acquisition with minimal disturbance on land. It recently proved this in a seismic survey in a noise-limited zone at the border of the Netherlands and Belgium. Being able to minimise environmental impact and to acquire higher-quality results in an environment with a challenging sub-surface made this project a success. This article compares the results achieved by one Storm10 eVibe in combination with STRYDE autonomous nodes, operated with zero carbon-emissions, to results obtained in mid-2022 using three conventional Mertz M12 diesel powered Vibroseis trucks in combination with Sercel WiNG nodes. We demonstrate that even with challenging operational conditions, the results achieved with the eVibe are superior for both the near-surface and deeper subsurface.
减少碳排放和减少土地干扰是陆地地震采集技术创新的主要动力。Seismic Mechatronics B V公司通过其全电池供电的电震源，在地震采集过程中实现了振动器和项目车辆的零碳排放，对陆地的干扰最小。最近，在荷兰和比利时边境的一个噪音限制区进行的地震调查证明了这一点。由于能够最大限度地减少对环境的影响，并在具有挑战性的地下环境中获得更高质量的结果，该项目取得了成功。本文将一辆Storm10 eVibe与STRYDE自动节点(零碳排放)相结合的结果与2022年年中使用三辆传统Mertz M12柴油动力振动震源卡车与Sercel WiNG节点相结合的结果进行了比较。我们证明，即使在具有挑战性的作业条件下，eVibe在近地表和更深的地下都取得了卓越的效果。
{"title":"Zero Carbon-Emission Field Operations for Onshore Seismic Acquisition","authors":"Jordan Bos, Nick Tranter, Ben Turner, Guy Drijkoningen","doi":"10.3997/1365-2397.fb2023082","DOIUrl":"https://doi.org/10.3997/1365-2397.fb2023082","url":null,"abstract":"Reducing carbon emissions and minimising land disturbances are key motivators to use innovations for onshore seismic acquisition. Seismic Mechatronics B V, through its fully battery-powered electric seismic source, has now enabled zero carbon-emission from vibrators and project vehicles during seismic acquisition with minimal disturbance on land. It recently proved this in a seismic survey in a noise-limited zone at the border of the Netherlands and Belgium. Being able to minimise environmental impact and to acquire higher-quality results in an environment with a challenging sub-surface made this project a success. This article compares the results achieved by one Storm10 eVibe in combination with STRYDE autonomous nodes, operated with zero carbon-emissions, to results obtained in mid-2022 using three conventional Mertz M12 diesel powered Vibroseis trucks in combination with Sercel WiNG nodes. We demonstrate that even with challenging operational conditions, the results achieved with the eVibe are superior for both the near-surface and deeper subsurface.","PeriodicalId":35692,"journal":{"name":"First Break","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134977228","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 : 2023-10-01DOI: 10.3997/1365-2397.fb2023086
Rasoul Sorkhabi
Preview this article: Geoscience Education and Workforce Development for the Energy Transition, Page 1 of 1 < Previous page | Next page > /docserver/preview/fulltext/fb/41/10/fb2023086-1.gif
{"title":"Geoscience Education and Workforce Development for the Energy Transition","authors":"Rasoul Sorkhabi","doi":"10.3997/1365-2397.fb2023086","DOIUrl":"https://doi.org/10.3997/1365-2397.fb2023086","url":null,"abstract":"Preview this article: Geoscience Education and Workforce Development for the Energy Transition, Page 1 of 1 < Previous page | Next page > /docserver/preview/fulltext/fb/41/10/fb2023086-1.gif","PeriodicalId":35692,"journal":{"name":"First Break","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134977453","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 : 2023-10-01DOI: 10.3997/1365-2397.fb2023079
Leon Barens, Yan Chen, Ross Wood, Chris Gunn, Robin Carter
The hydrocarbons of the Quad 9 fields in the Continental Shelf of the United Kingdom (UKCS) are stored in both submarine fans and injectites emerging from these fans. These injectites are imaged using both Depth Migrated and Diffraction Imaged seismic data. In the latter data set, the energy is focused on these lateral discontinuities in the subsurface. The interpretation of these data is not simple and needs to be done in conjunction with both seismic data sets to extract the most out of these data. After construction of a reservoir simulation model, the pressure and production history match quality were poor. When additional small scale injectites are interpreted on these data sets and included in the simulation model, the reservoir history match is improved significantly.
{"title":"Diffraction Imaging Used to Aid the Understanding of an Injectite Field Reservoir Connectivity – Example on the Quad 9 UK Continental Shelf","authors":"Leon Barens, Yan Chen, Ross Wood, Chris Gunn, Robin Carter","doi":"10.3997/1365-2397.fb2023079","DOIUrl":"https://doi.org/10.3997/1365-2397.fb2023079","url":null,"abstract":"The hydrocarbons of the Quad 9 fields in the Continental Shelf of the United Kingdom (UKCS) are stored in both submarine fans and injectites emerging from these fans. These injectites are imaged using both Depth Migrated and Diffraction Imaged seismic data. In the latter data set, the energy is focused on these lateral discontinuities in the subsurface. The interpretation of these data is not simple and needs to be done in conjunction with both seismic data sets to extract the most out of these data. After construction of a reservoir simulation model, the pressure and production history match quality were poor. When additional small scale injectites are interpreted on these data sets and included in the simulation model, the reservoir history match is improved significantly.","PeriodicalId":35692,"journal":{"name":"First Break","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134976772","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 : 2023-10-01DOI: 10.3997/1365-2397.fb2023080
Guilherme Vasquez, Marcio Morschbacher, Julio Justen, Elita de Abreu
Summary The Brazilian pre-salt comprises giant oil fields with high productivity carbonate reservoirs. Petroelastic modelling is an important tool for seismic interpretation. It uses rock physics models to estimate the elastic properties from petrophysical and compositional information and may be applied to forecast reservoir elastic behaviour from conceptual geological models as well as to estimate petrophysical properties from seismic elastic inversion results. We discuss the application of three rock physics models to pre-salt rocks from the Santos Basin: Stiff sand model (SSM), Vernik-Kachanov model (VKM) and Differential Effective Media (DEM). The results show that these three models perform very well in predicting reservoir elastic properties. We believe that the choice of a particular model can be based on the available parameters and on the desired application.
{"title":"Petroelastic Models for Santos Basin Pre-Salt Carbonates","authors":"Guilherme Vasquez, Marcio Morschbacher, Julio Justen, Elita de Abreu","doi":"10.3997/1365-2397.fb2023080","DOIUrl":"https://doi.org/10.3997/1365-2397.fb2023080","url":null,"abstract":"Summary The Brazilian pre-salt comprises giant oil fields with high productivity carbonate reservoirs. Petroelastic modelling is an important tool for seismic interpretation. It uses rock physics models to estimate the elastic properties from petrophysical and compositional information and may be applied to forecast reservoir elastic behaviour from conceptual geological models as well as to estimate petrophysical properties from seismic elastic inversion results. We discuss the application of three rock physics models to pre-salt rocks from the Santos Basin: Stiff sand model (SSM), Vernik-Kachanov model (VKM) and Differential Effective Media (DEM). The results show that these three models perform very well in predicting reservoir elastic properties. We believe that the choice of a particular model can be based on the available parameters and on the desired application.","PeriodicalId":35692,"journal":{"name":"First Break","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134976775","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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