Pub Date : 2018-12-06DOI: 10.3997/2214-4609.201803039
V. Kosmidou, S. Bellas, Y. Bassias
This paper suggests that the carbonate units south of the Kefalonia Transform Zone (KTZ) (Scordilis et al., 1985) bear similarities to the northern Paxi formations. From North to South and crossing the KTZ, we encounter sharply, from the Apulian Platform north of the KTZ, the Mediterranean Ridge, the backstop, the Hellenic Trench and the Hellenides Thrust and Fold Belt (TFB), south of the KTZ. Interpretation of data based on the 2012-2013 MC 2D seismic acquisition of PGS.
本文认为，Kefalonia转换带(KTZ)以南的碳酸盐岩单元(Scordilis et al.， 1985)与北部的Paxi组具有相似性。从北到南，穿过KTZ，我们从KTZ以北的阿普利亚台地，地中海山脊，后方，希腊海沟和KTZ以南的Hellenides逆冲和褶皱带(TFB)尖锐地遇到。基于PGS 2012-2013年MC 2D地震采集数据的解释
{"title":"Offshore Western Peloponnese: Structural Elements And Differences From Northern Ionian, Greece","authors":"V. Kosmidou, S. Bellas, Y. Bassias","doi":"10.3997/2214-4609.201803039","DOIUrl":"https://doi.org/10.3997/2214-4609.201803039","url":null,"abstract":"This paper suggests that the carbonate units south of the Kefalonia Transform Zone (KTZ) (Scordilis et al., 1985) bear similarities to the northern Paxi formations. From North to South and crossing the KTZ, we encounter sharply, from the Apulian Platform north of the KTZ, the Mediterranean Ridge, the backstop, the Hellenic Trench and the Hellenides Thrust and Fold Belt (TFB), south of the KTZ. Interpretation of data based on the 2012-2013 MC 2D seismic acquisition of PGS.","PeriodicalId":213700,"journal":{"name":"Eastern Mediterranean Workshop 2018","volume":"127 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123445580","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 : 2018-12-06DOI: 10.3997/2214-4609.201803052
H. Singh, A. Shahbazi
For any reservoir engineering issue or manage production from the petroleum reservoir, it is required to have seismic characterizations in quantitative manner, rather than qualitative geological interpretations. Herewith, seismic inversion could assist reservoir engineer as the technique to transform seismic data to quantitative rock properties. General steps in interpretation of seismic data preparing for porosity estimations consist of seismic structural interpretation, inversion procedure and attributes analysis. Since there is no direct measurement for the lithological parameters, they are to be computed from other geophysical logs or seismic attributes. This process also requires repeated intervention of the experts for fine tuning the prediction results. Standard regression methods are not suitable for this problem due to the high degree of the unknown nonlinearity. The problem is further complicated because of uncertainties associated with lithological units. In this context, Artificial Neural Network is considered to be useful tools to establish a mapping between lithological and well log properties. In this study, a strategy is presented for defining 3D seismic reservoir porosity model based on advanced method of artificial intelligence (AI) concept. This strategy then would be applied on a complex and heterogeneous oil reservoir which is a relatively symmetrical anticline whose trend is N-S. Required input data was prepared by seismic attribute and the velocity was modeled by vertical seismic profiling data. The general characterization strategy followed by initial inversion model construction for acoustic impedance of total cube for the target formation. Consequently, initial inversion model for effective and total porosity of the target formation was obtained. Acoustic impedance logs were used for neural network training and the genetic algorithm were used for calculation. High correlation values around 86% in cross plots, confirm accuracy of the porosity estimation by the AI method. This model then was used to precise the geological and geometrical properties of the reservoir for well location proposal.
{"title":"Improvement in Seismic Reservoir Characterization by Artificial Intelligence in Heterogeneous Media","authors":"H. Singh, A. Shahbazi","doi":"10.3997/2214-4609.201803052","DOIUrl":"https://doi.org/10.3997/2214-4609.201803052","url":null,"abstract":"For any reservoir engineering issue or manage production from the petroleum reservoir, it is required to have seismic characterizations in quantitative manner, rather than qualitative geological interpretations. Herewith, seismic inversion could assist reservoir engineer as the technique to transform seismic data to quantitative rock properties. General steps in interpretation of seismic data preparing for porosity estimations consist of seismic structural interpretation, inversion procedure and attributes analysis. Since there is no direct measurement for the lithological parameters, they are to be computed from other geophysical logs or seismic attributes. This process also requires repeated intervention of the experts for fine tuning the prediction results. Standard regression methods are not suitable for this problem due to the high degree of the unknown nonlinearity. The problem is further complicated because of uncertainties associated with lithological units. In this context, Artificial Neural Network is considered to be useful tools to establish a mapping between lithological and well log properties. In this study, a strategy is presented for defining 3D seismic reservoir porosity model based on advanced method of artificial intelligence (AI) concept. This strategy then would be applied on a complex and heterogeneous oil reservoir which is a relatively symmetrical anticline whose trend is N-S. Required input data was prepared by seismic attribute and the velocity was modeled by vertical seismic profiling data. The general characterization strategy followed by initial inversion model construction for acoustic impedance of total cube for the target formation. Consequently, initial inversion model for effective and total porosity of the target formation was obtained. Acoustic impedance logs were used for neural network training and the genetic algorithm were used for calculation. High correlation values around 86% in cross plots, confirm accuracy of the porosity estimation by the AI method. This model then was used to precise the geological and geometrical properties of the reservoir for well location proposal.","PeriodicalId":213700,"journal":{"name":"Eastern Mediterranean Workshop 2018","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132239820","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 : 2018-12-06DOI: 10.3997/2214-4609.201803046
A. El-Bassiony, J. Kumar, T. Martin, M. Bell
Recent large sub-salt discoveries in east Mediterranean waters have steered the focus on imaging beneath complex salt structures, where the main challenge is to correctly illuminate the sub-salt section. This involves optimizing acquisition parameters as well as building an accurate subsurface geological model. Only limited regions in the east Mediterranean are covered by multi-azimuth surveys; most of the 3D surveys available are narrow-azimuth. A lack of data diversity degrades the imaging of sub-salt zones even when using accurate subsurface models. Optimal model building for depth imaging involves the application of many complimentary imaging technologies to mitigate assumptions in any singular process. Illumination issues in the east Mediterranean are primarily caused by the complex interaction of shales and salt. The geometry of the salt layer and the velocity contrast across neighbouring lithologies determine the illumination and imaging quality beneath the salt layer. Using accurate interpretation of the top and base salt, and inserting a reliable velocity in the model, enhances the sub-salt imaging. This work focuses on the salt layer model building in three zones across the east Mediterranean Sea and the optimization of the salt/shales, and salt/carbonates velocities to enhance the sub-salt imaging and improve the reliability of amplitude data.
{"title":"Velocity Model Building Challenges And Solutions In The Eastern Mediterranean: Case Studies From The Region","authors":"A. El-Bassiony, J. Kumar, T. Martin, M. Bell","doi":"10.3997/2214-4609.201803046","DOIUrl":"https://doi.org/10.3997/2214-4609.201803046","url":null,"abstract":"Recent large sub-salt discoveries in east Mediterranean waters have steered the focus on imaging beneath complex salt structures, where the main challenge is to correctly illuminate the sub-salt section. This involves optimizing acquisition parameters as well as building an accurate subsurface geological model. Only limited regions in the east Mediterranean are covered by multi-azimuth surveys; most of the 3D surveys available are narrow-azimuth. A lack of data diversity degrades the imaging of sub-salt zones even when using accurate subsurface models. Optimal model building for depth imaging involves the application of many complimentary imaging technologies to mitigate assumptions in any singular process. Illumination issues in the east Mediterranean are primarily caused by the complex interaction of shales and salt. The geometry of the salt layer and the velocity contrast across neighbouring lithologies determine the illumination and imaging quality beneath the salt layer. Using accurate interpretation of the top and base salt, and inserting a reliable velocity in the model, enhances the sub-salt imaging. This work focuses on the salt layer model building in three zones across the east Mediterranean Sea and the optimization of the salt/shales, and salt/carbonates velocities to enhance the sub-salt imaging and improve the reliability of amplitude data.","PeriodicalId":213700,"journal":{"name":"Eastern Mediterranean Workshop 2018","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130025368","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 : 2018-12-06DOI: 10.3997/2214-4609.201803043
P. Pace, E. Battara, A. Riva, S. Borello, P. Ferretto, R. D. Cuia
The vertical and lateral facies variability related to the different depositional environments combined with the distribution of contrasting fracture network have relevant impacts on carbonate reservoir properties. In this study, we examine the impact of these features in a carbonate system composed of vertically-coupled porous-tight carbonates exposed on a structural high around the city of Matera in Southern Italy. The different facies, depositional processes and fracture characteristics that can be expected on similar subsurface settings are here documented from the selected outcrop analogue. The horst shows different lithologies and sedimentary bodies related to the occurrence of different processes linked to the morpho-tectonic configuration of the substratum and to the hydrodynamic conditions. The deformation mechanisms reflect the mechanical stratigraphy variation from tight to porous carbonates and the contrasting FF Sirte Basin) shedding light on the stratigraphic, sedimentary and structural complexities that can be expected in the subsurface.
{"title":"The Matera Carbonate Structural High: An Outcrop Analogue For Hydrocarbon Plays In The Mediterranean Region","authors":"P. Pace, E. Battara, A. Riva, S. Borello, P. Ferretto, R. D. Cuia","doi":"10.3997/2214-4609.201803043","DOIUrl":"https://doi.org/10.3997/2214-4609.201803043","url":null,"abstract":"The vertical and lateral facies variability related to the different depositional environments combined with the distribution of contrasting fracture network have relevant impacts on carbonate reservoir properties. In this study, we examine the impact of these features in a carbonate system composed of vertically-coupled porous-tight carbonates exposed on a structural high around the city of Matera in Southern Italy. The different facies, depositional processes and fracture characteristics that can be expected on similar subsurface settings are here documented from the selected outcrop analogue. The horst shows different lithologies and sedimentary bodies related to the occurrence of different processes linked to the morpho-tectonic configuration of the substratum and to the hydrodynamic conditions. The deformation mechanisms reflect the mechanical stratigraphy variation from tight to porous carbonates and the contrasting FF Sirte Basin) shedding light on the stratigraphic, sedimentary and structural complexities that can be expected in the subsurface.","PeriodicalId":213700,"journal":{"name":"Eastern Mediterranean Workshop 2018","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131375316","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 : 2018-12-06DOI: 10.3997/2214-4609.201803047
E. Landa, K. Smirnov, C. M. Paleari
The authors hereby propose diffraction imaging as a tool to de-risk small-scale features, as those related to a fractured carbonate reservoir. Diffraction imaging has indeed increasingly generated interest as a method for the detection and delineation of small-scale (less than the wave length) subsurface elements such as faults, pinchouts, karsts, fracture corridors, injectites, etc. These elements cause sharp changes/contrasts in the subsurface physical properties and geometry, and they are generic sources that scattered/diffracted seismic energy (Landa 2012). The diffracted energy carries however much lower intensity than the reflected one and this fact hinders the confident identification and delineation of the small-scale objects with standard methodologies. Therefore, the main aspect in diffraction imaging is the accurate separation of the diffracted and reflected components of the total wave field. Such separation can be performed efficiently in the structural dip-angle domain (Landa et al. 2008). In this study we present examples of diffraction imaging and interpretation for carbonate reservoirs. The results achieved show the high resolution and reliability of the proposed methodology.
在此，作者建议将衍射成像作为一种工具，以消除与裂缝性碳酸盐岩储层有关的小尺度特征的风险。衍射成像作为一种探测和描绘小尺度(小于波长)地下元素(如断层、针尖、岩溶、裂缝走廊、注入物等)的方法，确实越来越引起人们的兴趣。这些因素导致地下物理性质和几何形状的急剧变化/对比，它们是散射/衍射地震能量的一般来源(Landa 2012)。然而，衍射能量的强度比反射能量低得多，这一事实阻碍了用标准方法对小尺度物体的自信识别和描绘。因此，衍射成像的主要方面是准确分离总波场的衍射和反射分量。这种分离可以在结构倾角域中有效地进行(Landa et al. 2008)。本文介绍了碳酸盐岩储层的衍射成像和解释实例。结果表明，该方法具有较高的分辨率和可靠性。
{"title":"Diffraction Imaging: Tackling Challenges in the Current Imaging of Complex Carbonate Environments","authors":"E. Landa, K. Smirnov, C. M. Paleari","doi":"10.3997/2214-4609.201803047","DOIUrl":"https://doi.org/10.3997/2214-4609.201803047","url":null,"abstract":"The authors hereby propose diffraction imaging as a tool to de-risk small-scale features, as those related to a fractured carbonate reservoir. Diffraction imaging has indeed increasingly generated interest as a method for the detection and delineation of small-scale (less than the wave length) subsurface elements such as faults, pinchouts, karsts, fracture corridors, injectites, etc. These elements cause sharp changes/contrasts in the subsurface physical properties and geometry, and they are generic sources that scattered/diffracted seismic energy (Landa 2012). The diffracted energy carries however much lower intensity than the reflected one and this fact hinders the confident identification and delineation of the small-scale objects with standard methodologies. Therefore, the main aspect in diffraction imaging is the accurate separation of the diffracted and reflected components of the total wave field. Such separation can be performed efficiently in the structural dip-angle domain (Landa et al. 2008). In this study we present examples of diffraction imaging and interpretation for carbonate reservoirs. The results achieved show the high resolution and reliability of the proposed methodology.","PeriodicalId":213700,"journal":{"name":"Eastern Mediterranean Workshop 2018","volume":"214 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132390535","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 : 2018-12-06DOI: 10.3997/2214-4609.201803033
S. Kiselev
A new methodology for the study of the structure of the top layer for a more accurate construction of deep image seismic data
为更准确地构建深成像地震资料提供了一种研究顶层结构的新方法
{"title":"Step-By-Step Solutions Of Structural Geophysics Problem","authors":"S. Kiselev","doi":"10.3997/2214-4609.201803033","DOIUrl":"https://doi.org/10.3997/2214-4609.201803033","url":null,"abstract":"A new methodology for the study of the structure of the top layer for a more accurate construction of deep image seismic data","PeriodicalId":213700,"journal":{"name":"Eastern Mediterranean Workshop 2018","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134230504","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 : 2018-12-06DOI: 10.3997/2214-4609.201803050
K. Oikonomopoulos, G. Makrodimitras, Y. Bassias, A. Vafidis, N. Andronikidis
The recent seismic data offshore Greece revealed, south of Crete, the presence of an external Hellenides carbonate unit similar in dimensions to this of the island of Crete. Velocity modelling helps in this study to emphasise the tectonic-stratigraphic image below the seafloor at depths reaching 9 kilometres.
{"title":"Integration Of Geophysical Tools To Determine The Structural Setting Offshore South Of The Island Of Crete","authors":"K. Oikonomopoulos, G. Makrodimitras, Y. Bassias, A. Vafidis, N. Andronikidis","doi":"10.3997/2214-4609.201803050","DOIUrl":"https://doi.org/10.3997/2214-4609.201803050","url":null,"abstract":"The recent seismic data offshore Greece revealed, south of Crete, the presence of an external Hellenides carbonate unit similar in dimensions to this of the island of Crete. Velocity modelling helps in this study to emphasise the tectonic-stratigraphic image below the seafloor at depths reaching 9 kilometres.","PeriodicalId":213700,"journal":{"name":"Eastern Mediterranean Workshop 2018","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116774696","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 : 2018-12-06DOI: 10.3997/2214-4609.201803040
N. Papadimitriou, C. Gorini, A. Tassy, F. Nader, R. Deschamps, J. Lecomte
The Eratosthenes carbonate system tells us a complex story of the establishment, growth, and development of this giant isolated carbonate platform through intervals of partial demise and recovery. The Eratosthenes isolated platform shows an evolution partly similar to other Tethyan margins. It's Jurassic retrograding lower unit is followed by a Cretaceous aggrading carbonate platform (forereef breccia, buildups and probably lagoonal facies). The seismic interpretation has shown that the Early Cretaceous platforms on the Levant margin and Eratosthenes Seamount were both drowned in the late Cretaceous. Then, the drowning was followed by the deposition of shallow carbonates during the Miocene. Such an interpretation is enhanced by the recent discoveries of hydrocarbons south of the Eratosthenes seamount (e.g., Zhor). In fact, ENI Oil Company confirmed the presence of greater than 16 Tcf in subsalt either Cretaceous or Miocene carbonate build-ups, indicating that the understanding of the evolution of this new frontier hydrocarbon province is of great importance.
{"title":"Anatomy of the Mesozoic Tethyan Margins: The Eratosthenes Carbonate Platforms of the Levant Basin","authors":"N. Papadimitriou, C. Gorini, A. Tassy, F. Nader, R. Deschamps, J. Lecomte","doi":"10.3997/2214-4609.201803040","DOIUrl":"https://doi.org/10.3997/2214-4609.201803040","url":null,"abstract":"The Eratosthenes carbonate system tells us a complex story of the establishment, growth, and development of this giant isolated carbonate platform through intervals of partial demise and recovery. The Eratosthenes isolated platform shows an evolution partly similar to other Tethyan margins. It's Jurassic retrograding lower unit is followed by a Cretaceous aggrading carbonate platform (forereef breccia, buildups and probably lagoonal facies). The seismic interpretation has shown that the Early Cretaceous platforms on the Levant margin and Eratosthenes Seamount were both drowned in the late Cretaceous. Then, the drowning was followed by the deposition of shallow carbonates during the Miocene. Such an interpretation is enhanced by the recent discoveries of hydrocarbons south of the Eratosthenes seamount (e.g., Zhor). In fact, ENI Oil Company confirmed the presence of greater than 16 Tcf in subsalt either Cretaceous or Miocene carbonate build-ups, indicating that the understanding of the evolution of this new frontier hydrocarbon province is of great importance.","PeriodicalId":213700,"journal":{"name":"Eastern Mediterranean Workshop 2018","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132161189","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 : 2018-12-06DOI: 10.3997/2214-4609.201803044
O. Shtukert, O. Schenk, F. Winter, R. Cooke, A. Checconi, G. Milne
The Maltese Islands have a long hydrocarbon exploration history, but with limited success, so far. However, as the southern part of the Ragusa plateau (Hyblean foreland) has major oil fields offshore Southern Sicily it should be considered as prospective region. In terms of prospectivity, the area in the south is surrounded by proven petroleum systems and shows; and from an exploration point of view, with important analogies to the well-known offshore Tunisia and northern Libyan petroleum provinces. In the north, the area is next to offshore southern Sicily with well-known large oil fields on the Ragusa plateau. Offshore Malta is covered by several seismic vintages of 2D data (WG and TGS). Interpretation of 2D, both structural and stratigraphic, delineates a better understanding of the individual petroleum systems within the area. The objective of the study is to summarize the results of the interpretation completed by WG and TGS tying areas covered by both parties’ seismic, extrapolate the findings across the plays and leads identified on seismic offshore Malta and update our insight with new petroleum system analyses, to assess the geological evolution of the area, and give our perspective on the exploration potential of this under-explored area.
{"title":"Offshore Malta: Play Types And Results From Petroleum System Modelling","authors":"O. Shtukert, O. Schenk, F. Winter, R. Cooke, A. Checconi, G. Milne","doi":"10.3997/2214-4609.201803044","DOIUrl":"https://doi.org/10.3997/2214-4609.201803044","url":null,"abstract":"The Maltese Islands have a long hydrocarbon exploration history, but with limited success, so far. However, as the southern part of the Ragusa plateau (Hyblean foreland) has major oil fields offshore Southern Sicily it should be considered as prospective region. In terms of prospectivity, the area in the south is surrounded by proven petroleum systems and shows; and from an exploration point of view, with important analogies to the well-known offshore Tunisia and northern Libyan petroleum provinces. In the north, the area is next to offshore southern Sicily with well-known large oil fields on the Ragusa plateau. Offshore Malta is covered by several seismic vintages of 2D data (WG and TGS). Interpretation of 2D, both structural and stratigraphic, delineates a better understanding of the individual petroleum systems within the area. The objective of the study is to summarize the results of the interpretation completed by WG and TGS tying areas covered by both parties’ seismic, extrapolate the findings across the plays and leads identified on seismic offshore Malta and update our insight with new petroleum system analyses, to assess the geological evolution of the area, and give our perspective on the exploration potential of this under-explored area.","PeriodicalId":213700,"journal":{"name":"Eastern Mediterranean Workshop 2018","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114280664","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 : 2018-12-06DOI: 10.3997/2214-4609.201803045
I. Deighton, R. Cooke, F. Winter
TGS have enjoyed a longstanding relationship with Malta, having first acquired ~10,000 km of 2D seismic data surrounding the islands in 2000/01. In 2013/4, ~6,500 km was reprocessed to better delineate a range of features from Triassic to Tertiary. With 11 wells drilled in Maltese waters between 1971 and 1998, exploration has significantly slowed down with only two wells being drilled since. Despite an absence of commercial hydrocarbons encountered, there have been numerous oil and gas shows ranging from Triassic to Tertiary. The petroleum potential of Malta is prospective and varied since the various working petroleum systems from the prolific neighbouring offshore regions of Tunisia, Sicily and Libya are postulated to be present. TGS have been granted data from the Maltese government to produce an updated temperature model. Using Fobos Pro, TGS’ internal basin modelling software package, a regional temperature model will be built and adjusted to to output ‘optimal temperature zones’ pertaining to source and reservoir. Preliminary reviews of the data suggest that there are clear trends such as an increased geothermal gradient in the Mesozoic basins (south of Malta) in contrast to the lower gradient on the Malta Plateau. Full details will be presented at the Workshop.
{"title":"A Study Of Petroleum Systems Offshore Malta Through Updated Basin Modelling Providing Enhanced Regional Prospectivity","authors":"I. Deighton, R. Cooke, F. Winter","doi":"10.3997/2214-4609.201803045","DOIUrl":"https://doi.org/10.3997/2214-4609.201803045","url":null,"abstract":"TGS have enjoyed a longstanding relationship with Malta, having first acquired ~10,000 km of 2D seismic data surrounding the islands in 2000/01. In 2013/4, ~6,500 km was reprocessed to better delineate a range of features from Triassic to Tertiary. With 11 wells drilled in Maltese waters between 1971 and 1998, exploration has significantly slowed down with only two wells being drilled since. Despite an absence of commercial hydrocarbons encountered, there have been numerous oil and gas shows ranging from Triassic to Tertiary. The petroleum potential of Malta is prospective and varied since the various working petroleum systems from the prolific neighbouring offshore regions of Tunisia, Sicily and Libya are postulated to be present. TGS have been granted data from the Maltese government to produce an updated temperature model. Using Fobos Pro, TGS’ internal basin modelling software package, a regional temperature model will be built and adjusted to to output ‘optimal temperature zones’ pertaining to source and reservoir. Preliminary reviews of the data suggest that there are clear trends such as an increased geothermal gradient in the Mesozoic basins (south of Malta) in contrast to the lower gradient on the Malta Plateau. Full details will be presented at the Workshop.","PeriodicalId":213700,"journal":{"name":"Eastern Mediterranean Workshop 2018","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134502475","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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