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EAGE Conference on Geology and Petroleum Geology of the Mediterranean and Circum-Mediterranean Basins
- Conference date: 01 Oct 2000 - 04 Oct 2000
- Location: St. Julians, Malta
- ISBN: 978-90-73781-14-6
- Published: 01 October 2000
1 - 50 of 107 results
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On The Foreland Monoclines and Foredeeps in the Mediterranean Belts
Authors C. Doglioni and G. MariottiThe foreland monocline is a common feature for all thrust belts or accretionary wedges and related foredeep (Bally, 1983). The foreland geology is often understated in regional studies of orogens, in spite of its crucial role in controlling the thrust belts evolution. The foreland monocline tends to increase its dip toward the interior of the belts (Boyer, 1995), and its subsidence rate controls the development of the trench or the foreland basin, whatever is their origin.
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Miocene Valley Filled Network in the Rhodanian-Provencal Basin, Influence of the Alpine Forebulge
Authors J. -L. Rubino, G. Clauzon, O. Parize and D. BessonThe Rhodanian-Provencal Basin is the southernmost part of the Peri-Alpine Seaway developed during the Miocene from Austria to the Mediterranean Sea (Fig. 1). This basin is located in a peripheral or external domain of the Western Alps foreland basin. Flexural subsidence related to alpine thrust loading provides accomodation space.
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Structual Model of Central Eastern Sicily
Authors M. Bello and S. MerliniSeismic surveys in Central-Eastern Sicily are located mostly where hydrocarbon exploration is concentrated, namely Hyblean area to the South and the Nebrodi range to the North (Fig 1). The recent acquisition of three regional seismic profiles in the central Sicily created a link between these two areas. This has supplied a lot of informations on the structural setting of this part of the Sicilian thrust belt, in comhination with well log, surface stratigraphic and structural data, magnetometric and gravirnetric data and allowed us to define a new geo-structural model for this area.
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Crustal Structures from the Eastern Algerian Basin to the Ionian Ocean - Central Mediterranean
Authors R. Catalano, A. Franchino, S. Merlini and A. SulliResults from the interpretation of deep seismic lines (CROP Italian Deep Crust Project) provide the first, continuous, 900-km-long crustal geologic transect crossing the Central Mediterranean from the Algerian Sea to the lonian Sea (Fig. 1). The geoseismic section (Fig. 2) reveals crustal and Moho reflections to a depth of about 30 km and elucidates the crustal architecture and processes associated with the opening of the Oligo-Miocene Algerian-Provencal basin, the Tertiary mountain building of the Alpidic chain and the Mesozoic continental rifting to oceanic spreading of Malta-Iblean margin-lonian abyssal plain.
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Spatio-Temporal Distribution Petrological Characteristics of the Various Magmatic Phases in Tunisisa
More LessThe study concerns the magmatic rocks found in the various structural domains of Tunisia. The recent deposit, mineralogical, geochimical, isotopic and radiochronological data permit the definition of the spatio-temporal distribution of the various magmatic phases, their importance, the mode of their formation, their petrological characteristics as well as the geodynamic contexts.
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The Geological Evaluation of Concession 9 Area in Northwest Libya
More LessA study of the geological history and hydrocarbon prospectivity of Concession 9 and its surrounding area in northwest Libya (fig 1), has been undertaken, based on the interpretation of about 1000 km of seismic reflection data and information from 15 wells. One third of the seismic coverage is onland and ties to a well to the south of the Concession. The remaining coverage is offshore and ties to two wells to the north of the Concession. The study area is situated in the northern part of the onshore Jeffara Basin and extends northward across the Libyan continental shelf into the southern flank of the offshore Gabes-Tripoli-Misurata Basin.
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USGS Petroleum Assessment of the World - How Do the Rift Basins of the Mediterranean Rank?
More LessThe USGS recently completed an assessment of the conventionally recoverable undiscovered oil and gas resources of the world . Of the 246 assessment units in the world, 88 were identified a s being, at least in part, in extensional tectonic or rilt areas. An additional; 21 assessment units veere identified as being in solely extensional areas.
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Undiscovered Resources in Rift Basins of The Mediterranean - Comparison to the North Sea
Authors D. L. Gautier, T. S. J. Ahlbrandt and M. PawlewiczThree prominent rift basins in the immediate vicinity of the Mediterranean Sea are identified as having significant petroleum potential: the Sirte Basin, the Red Sea Basin, and the Provence Basin. It is estimated that these three petroleum provinces contain undiscovered resources in excess of 126 trilbon cubic feet of natural gas and 12 billion barrels of oil as well as abundant natural gas liquids.
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Multidisciplinary Approach - A Leverage for 3D Pre Stack Depth Migration
Authors N. Pajola, F. Luoni, R. Awad and I. El DosoukiThe aim of the study was to obtain a reliable image of the subsurface, in order to properly evaluate the residual hydrocarbon potential of the Ras Garra Development Lease.
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Laminar Flow Modelling of Initial Salt Deformation
More LessAlthough salt structures can assume complex geometries, their gross regional distribution in a salt province is often observed to follow a more simple and regular pattern that can be mathematically described in terms of an initial horizontal salt flow caused by loading variations in the overburden.
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Palaeoenvironments of the Palaeogene in the Sirt Basin
By A. GammudiOstrucod faunas are widely used for palaeoenvironmental reconstruction, because of their abundant and high diversity throughout geological history, and their occurrence in a wide environmental spectrum such as fresh, brackish water, marine and even rarely terrestrial habites.
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Petroleum Exploration Strategies in Mobile Belts
Authors F. Roure, D. G. Howell and R. SwennenForeland fold-and-thrust belts (FFTB) still comprise the World's largest petroleum reserves. However, due to their structural complexity, FFTB frequently constitute a frontier for the exploration. Based on the distribution of surficial seepages, first drillings were focused on shallow targets, either in shallow anticlines near the thrust front, or in dominantly stratigraphic traps, up-dope the regional foreland flexure.
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The Southern Apennine Thrust Belt - Forward Structural and Geochemical Modelling Since Messinian Times
Authors S. Sciamanna, R. Gambini, F. Mosca, C. Nicolai, J. L. Rudkiewicz and W. SassiThe Southern Apenmines Thrust Belt (SATB) is a prolific petroleum province in Italy. In this work, we reconstruct its structural evolution since the Messinian and the timing of hydrocarbon generation and expulsion, integrating geological and geochemical constraints.
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Oil Plays and Exploration Potential of Italy
Authors R. Gambini and C. NicolaiSummary not available
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Computer Modelling of Petroleum Systems Along Regional Cross-Sections in Foreland and Fold-and-Thrustbelts
Authors W. Sassi and J. L. RudkiewiczThis paper describes a methodology to evaluate a petroleum system in fold-and-thrustbelts. This methodology is based on the reconstruction of the structural evolution on a regional cross-section and on the modelling of the thermal regime at present time and through geological time. The onset of hydrocarbon generation and expulsion from source rocks into traps, resulting from the temperature history and the kinetics of the kerogens can be investigated. The modelling accounts for the changes in the composition of hydrocarbons during generation and expulsion from the source rocks and may be instrumental to predict the global composition of trapped hydrocarbons in developing structures. This methodology was applied to many history cases from well known petroleum provinces of fold and thrustbelts environments. In many case, initial geologic interpretations can significantly be improved by reconstructing the past thermal regimes and maturity evolution computed from the result of a geometric and kinematic forward evolution on a regional cross-section.
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Surface Controls on the Thermal Regime of External Zones of Orogenic Belts
Authors L. Husson and I. MorettiIn extensional settings, the thermal evolution is closely linked to the global geodynamic development (lithospheric and crustal thinning). In collision areas, numerous processes acting on the thermal field. are superimposed and the evolution through time is subsequently more complex. The surface heat flow density (HFD) distribution across active orogenic belts show large variations and illustrates that no standard profile can be proposed (fig .1).
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A New Technique for 3D Restoration of Flexural Slip Folds
Authors P. A. Griffiths, N. Saltar, F. Schaefer, S. Jones and H. ReiserA new structural restoration and forward modelling flexural slip technique for three-dimensional (3D) digital models has been developed. The flexural slip method preserves volume in 3D, line length (of the template surface and layers parallel to this surface) in a given unfolding direction and orthogonal bed thickness. The model surfaces need not be parallel to each other. These constraints allow 3D fault-propagation, fault-bend and detachment folds to be restored or forward modelled.
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An Analytical Approach for Modelling the Three-Dimensional Distribution of Cataclastic Rocks
Authors F. Salvini, A. Billi, F. Storti and R. GambiniSpatial distribution and three-dimensional location of cataclastic rocks within fault zones deeply influence their rheology and permeability properties. Despite their importance in hydrocarbon research and development, location and triggering factors of cataclasite formation are poorly understood.
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Self-Constrained Computer Models of Fault-Related Folding
Authors F. Salvini and F. StortiA great contribution in the study of fault-related folds in foreland belts derives from kinematic and geometric models. This technique proved efficient both in the interpretastion and balancing of the tectonic structures.
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Semi-Automatic Detection of Subsurface Seismic Bodies of Relevant Stratigraphic Interest
Authors L. Ferri, M. Fervari, M. T. Galli and P. RocchiniExtensive 3D seismic volumes from around the world have started to show geometry and facies textures of geobodies, which traditionally interpreted through conventional 2D vertical sections, following a time-consuming seismic stratigraphic approach. This method is too labor-intensive and error-prove to be cost-effective.
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Widespread Lgm Axial Incision in Submarine Canyons of the Western Gulf of Lions
Authors J. Baztán, S. Berné, M. Canals, J-L. Olivet, M. Rabineau, J-P. Rénault and J. LofiA detailed morphological analysis of the submarine canyons in the Western Gulf of Lions shows the widespread occurrence of an axial incision excavated within the main valley. Such an incision is interpreted as a relict feature dating from the Last Glacial Maximum when sediment transfer from river mouths to canyon heads was enhanced due to sea level lowstand and to increased continental runoff.
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High-Frequency Sea-Level Changes Control the Recent Sedimentary Architecture of a Small Modern Turbidite System
Authors F. Pérez-Belzuz, B. Alonso and A. GalimontThe morphology, sedimentary architecture and recent sedimentary evolution of the Calahonda Turbidite System (Alboran Sea, SW Mediterranean) was established through the analysis of ultra-high resolution seismic profiles, swath bathymetry and sediment cores.
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Control of Thrust Propagation on Turbidite Sedimentation
Authors A. Artoni, D. Di Biase, E. Mutti and R. TinterriIn foreland basins, the deep and narrow trough which forms adjacent to the thrust front is commonly termed foredeep, and, until the orogenic wedge is not significantly uplifted and emerged, the trough is characteristically filled in with axial turbidites sourced from fluvio-deltaic systems located in emerged areas of adjacent orogens where substantial tectonic uplift has already occurred.
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Deep-Water Canyons in Circum-Mediterranean Regions - From Erosional Vacuities to Entrenched Meanders
Authors B. T. Cronin and A. HurstThe origin and morphology of deep-water canyons bas been the subject of many oceanographic expeditions since the late 1960s. Their recognition at outcrop has been inferred in many turbidite basins on the basis of evidence for prolonged periods of sediment bypass, usually during tectonically driven periods of basin margin reconfiguration, or the presence of attenuated packages of clast-supported gravels in association with deep-water shales.
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Facies and Processes of Turbidite Systems
Authors E. Mutti and R. TinterriOver the past two decades marine geological investigations, outcrop studies, laboratory experiments and numerical modelling, and, particularly, a wealth of seismic, well-log and core data derived from extensive exploration for hydrocarbons carried out in many offshore basins worldwide, have provided an increasing body of evidente indicating the very complex and stip poorly understood nature of many deep-water sandstone facies.
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Tectonics of the Eastern Mediterranean
Authors X. Lepichon, C. Rangin and N. Chamot-RookeThere has been a considerable amount of studies of the lands bordering the Eastern Mediterranean basin but the basin itself is still relatively poorly known. The tectonic analysis of this basin is difficult to do because a great part of it has disappeared within a double system of subduction zones, the Hellenic one that is stip active and the Calabrian one that stopped being active less than one million years ago.
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New Insights on the Mechanisms of Deformation on the Eastern Mediterranean Ridge
Authors A. Camerlenghi, E. Costa, A. Polonia, C. Cooper, P. Fabretti, A. Moscini, P. Murelli, M. Romanelli, L. Sormani and N. WardellShortening along the Mediterranean Ridge is the result of convergente between Africa and Eurasia plates and the motion of the Aegean microplate.
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Deformational Styles of the Central and Eastern Mediterranean Ridge
Authors J. Mascle, C. Huguan, J. Benkhelil, A. Volkonskaia, J. Woodside and theScientific PartyDetails of the sea floor and of deformational styles of large portions of the central and eastern Mediterranean Ridge (MR) are revealed in recent 100% coverage swath bathymetry, acoustic imagery, together with continuons seismic profiling.The MR is a wide accretionnary wedge that results from convergente and ongoing incipient collision between Europe, Africa and the Anatolia-Aegea microplate, in Eastern Mediterranean.
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General Tectonic Framework of the Eastern Mediterranean
More LessOur understanding of the tectonic framework of the eastern Mediterranean has greatly improved in the past ten years or so. New research has benefited from deep sea drilling by the Ocean Drilling Program (ODP), the extensive use of new techniques such as multibeam swath mapping, unexpected results from investigations of mud volcanoes and fluid seeps, and exploration of areas of potential resources like the Nile offshore.
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First Results from the Multi-Channel Seismic Reflection Study in the Gulf of Marmaris
Authors N. Ocakoglu, E. Demirbag, B. Ecevitogli, I. Kuscu, C. Gocmen and S. KaragozThe active tectonism in the Gulf of Marmaris located at the southwest Anatolia Renion was investigated by means of multi-channel seismic reflection data.
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Exploration in NW Greece with Application of Passive Seismic Tomography
Authors K. Eleni, T. G-Akis and M. AlbertoTomographic Passive Seismic Inversion utilising P and S-wave travel times from 455 local micro-earthquakes has been applied in Epirus (NW Greece). The objective of the project was to image the sub-surface volume in the region, an area which is currently being explored for hydrocarbons by a consortium operated by Enterprise Oil.
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A New Sub-Thrust Play for Hydrocarbon Exploration in Central Albania - Seismic and Structural Interpretation
Authors E. Deville and A. CollakuThe stratigraphy of the Ionian and Kruja Albanian zones can be subdivided in four sedimentary sequences: 1. Triassic evaporites, 2. lonian Triassic to Eocene basin and Kruja platform carbonates, 3. Oligocene to Burdigalian flysch, and 4. Tortonian to Pliocene molassic sediments deposited in the foreland basin.
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Neotectonic Features Revealed by Seismic Data on Periadriatic Depression, Albania
By J. SkramiThe Preadriatic Depression is located in the western part of Albania. The Preadriatic basin is formed after the main folding and .thrusting of Ionian zone and is filled with Mio-Pliocene molasse. The folding and thrusting of Preadriatic Depression is finally due to the Early Pleistocene compressional phase that is evidenced by some important structural unconformities. The Preadriatic Depression is built by some linear relatively narrow anticlines, superimposed over thrust or backthrust faults, and wide synclines.
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The Western Prerif Area, Northern Morocco Geology an Exploration Play Concepts
Authors M. Dakki and M. El MostaineThe western Prerif area, located in northem Morocco, constitutes the most extemal structural unit of the Rif Alpine domain which inciudes essentially Mesozoic and Cenozoic folded sediment overlaying the Paleozoic basement.
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Continental, Sabkha and Shallow Open Marine Liassic-Triassic Sequence Offers New Exploration Plays in Malta
Authors G. Debono, S. Xerri and W. F. BishopEarly Jurassic and Triassic sedimentary rocks from a deep well on the island of Gozo, Malta, show a remarkable correlation with contemporaneous ones in North Africa The prevailing depositional environment during the Middle to earliest Late Triassic in the Gozo area was transitional with deposition of anhydrite and shales equivalent to the evaporitic facies of the Currusc Formation of North Africa.
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Norian Carbonate Platform and Related Basins - An Example from the East Lombardy Southern Alps, Italy
Authors P. Ronchi, R. Fantoni, P. Scotti, G. L. Trombetta and D. MasettiThe Upper Triassic succession of the Lombardy Basin includes petroleum systems composed of carbonate platform reservoirs and intraplatform basin source rocks. These systems are proved to be efficient in the subsurface oil fields of the Po Valley.
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Enhancing Structural Analysis with the Fourier Transform - An Example from the Berkine Basin, Algeria
Authors W. I. Taylor and F. J. GauthierThe primary challenge of structural geologists in the petroleum industry is to characterize the spatial distribution of folds, faults, and joints in the subsurface and to understand how these features effect the migration and entrapment of hydrocarbons. In most cases, subsurface data are insufficient to accurately characterize rock deformation at the desired scale. As a result, conceptual models are invoked to help translate sparse data sets into structural interpretations. The selection of an appropriate model is often lelt to intuition or is based on a "common perception" that has not been verified.
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High-Resolution Chemostratigraphy, Biostratigraphy and Paleoceano-Graphic Significance of the Thetyan "Livello Selli" from the Hybla Formation, Nw Sicily
Authors A. Bellanca, E. Erba, R. Neri, I. Premoli Silva, M. Sprovieri, F. Tremolada, D. Verga, F. Meli and G. PetroloHigh-resolution curves of carbon and oxygen isotopes and of major and trace elements have been generated for the early Aptian "Livello Selli" (LS, OAE la) from the pelagic sedimentary sequence outcropping at Calabianca in the northwestern margin of Sicily.
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Late Cretaceous Geological History of Zaltan Platform (Concession 59), South Central Sirt Basin, Libya
Authors M. M. Abu Gares and M. T. El BakaiThe Late Cretaceous stratigraphic sequences are widespread and consist of marine shale and limestone ranging in age from the Turonian up to the Maastrichian. In the study area the sequence of the Late Cretaceous is divided into five clearly recognizable formations.
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Exploration Potential in the Offshore Mediterranean, Egypt - Perspectives from the Context of Egypt's Future Resources and Business Challenges
Authors J. C. Dolson, P. J. Boucher and M. V. ShannEgypt has developed 15.4-17 BBOE equivalent resources in three major geological provinces in the last 100 years of exploration. Nine billion barrels have been discovered in the mature province of the Gulf of Suez, an additional 2.5 BBOE in the Western Desert and 25 TCF (4.1 BBOE) in the onshore and offshore Mediterranean Nile Delta. Future growth potential will come primarily from deeper pool Jurassic age reservoirs in the Western Desert and from deep water exploration in the Mediterranean sea.
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Habitat and Exploration Potential of the Ultra-Deepwater Offshore Mediterranean
Authors A. Abdel Aal, A. El Barkooky, M. Gerrits, H. Mayer, M. Schwander and H. ZakiThe Northeast Mediterranean Deepwater Block lies in water depths of 800m to 2800m in front of the Nile Delta Cone. The Block is exceptional for its site (41,500 km2), roughly equal to the total area presently licensed over the Nile Delta, which to date has yielded dry gas and gas/condensate. The structural and stratigraphic setting of the block offers a variety of hydrocarbon trapping possibilities similar to the deegwater settings of other productive deltas. This venture falls in the category of real frontier exploration opportunity.
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Lower Congo Basin, Deepwater Exploration Province, Offshore West Africa
Authors J. Leite, T. W. Schirmer and B. R. LawsThe Lower Congo Basin lies offshore of the west coast of Africa and covers 115,000 square kilometers from the Republic of Congo to central Angola, in water depths extending to over 3500 meters. A large number of oil and gas fields occur in the basin (14 MMMBOEG produced and proven).
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Geophysical Characterisation of the Simian Discovery, West Delta Deep Marine Concession, Nile Delta, Egypt
Authors A. Sharp, A. Samuel and F. FedericiSimian is a deep water (300-1500m depth) discovery located 75 km north-east of Alexandria in the western part of the Offshore Nile Delta.
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The Atlantic Deepwater between Tanger and Safi, Geology and Play Concepts
Authors M. Hssain and M. El MostaineThe study areas located in the northern part of Morocco extend a long the western cost between the cities Safi and Tangier. The continental platform covers an area of about 24,000 sq.km; however, the petroleum exploration zone extends in deep water under 200 m isobath (Fig. 1).
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Gas Chimneys in the Nile Delta Slope and Gas Fields Occurrence
Authors K. Barsoum, M. Della Martera and A. Menardi NogueraGas chimneys" and "gas plumes", poor seismic data zones above gas-hearing structures, are quite common and characteristic in hydrocarbon productive basins. Scatterering of seismic energy causes poor data zones in the cap rock penetrated by leaked gas above a gas reservoir.
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