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1st EAGE North African/Mediterranean Petroleum & Geosciences Conference & Exhibition
- Conference date: 06 Oct 2003 - 09 Oct 2003
- Location: Tunis, Tunisia
- Published: 06 October 2003
61 - 80 of 162 results
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Hameimat Trough (Sirt Basin-Libya) – Early Stage of Rifting – Depositional and Volcaniclastic Processes
Authors M. Fornaciari, H. Seddiq and A. DakshiS011 HAMEIMAT TROUGH (SIRT BASIN -LIBYA) – EARLY STAGE OF RIFTING – DEPOSITIONAL AND VOLCANICLASTIC PROCESSES Summary 1 The Hameimat Trough represents the southeastern arm of the Sirte Basin and it shows an example of rifting development including structural depositional and volcaniclastic processes. The main rifting phase is Upper Cretaceous in age and the leading structural features are two NW-SE border faults linked by a regional NE-SE transfer fault with a strike-slip component. The rift basin is characterized by the deposition of a thick section of evaporites that marks the limits of the subsiding trough. The depositional sequences define the
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Volcanic Intrusions in Southern Tunisia – Characterisation and Development Mechanism
Authors D. Kebaier, N. Larid Ouazaa and F. HamoudaS012 VOLCANIC INTRUSIONS IN SOUTHERN TUNISIA – CHARACTERISATION AND DEVELOPMENT MECHANISM Introduction 1 In Tunisia three magmatic domains can be identified during the Triassic cycle a northern domain represented by the outcropping rocks either in diapiric Triassic or in the Carbonate Triassic in Northern Tunisia a central domain encountered in subsurface close to the North South Axis ; and a southern domain known from wells drilled in Sabria and El Franig areas. The two first domains have often been discussed and documented in the literature. The aims of this paper are to provide a description of the magmatic facies in
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The Geology and Hydrocarbon Potential of Ghadamis and Murzuq Basins, West Libya
More LessS013 THE GEOLOGY AND HYDROCARBON POTENTIAL OF GHADAMIS AND MURZUQ BASINS WEST LIBYA Abstract 1 F. Belhaj¹ R. Khalil² A. Sherif³ 1. TPOC Exploration Dept. Burj Al Fatah 9 th Floor-Tripoli Libya. [email protected]. 2. Petro-Canada. 3. Al-Fatah University The Palaeozoic and Mesezoic potential strata present in both Murzuq and Ghadamis basins is mainly represented by clastic sequences reaching a preserved thickness of more than 20 000ft in north-western Ghadamis Basin. The Palaeozoic strata in the two basins is directly related to the Palaeozoic sequences prevalent in the North African basins (Figure 1 & 2). The detailed interpretation of the Palaeozoic
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Location of the North Saharan Flexure in Southern Tunisia from Gravity Data
Authors H. Gabtni, C. Jallouli, H. Zouari, M.M. Turki and K.L. MickusS014 LOCATION OF THE NORTH SAHARAN FLEXURE IN SOUTHERN TUNISIA FROM GRAVITY DATA 1 H. GABTNI 1&2 C. JALLOULI 1 H. ZOUARI 2 M.M. TURKI 1 K.L. MICKUS 3 1 Département de Géologie Faculté des Sciences de Tunis Campus Universitaire 1060 Tunis Tunisia. 2 Laboratoire de Géoressources Institut National de Recherche Scientifique et Technique Borj-Cedria B.P. 95 2050 Hammam-Lif Tunisia. 3 Department of Geosciences Southwest Missouri State University Springfield MI 65804 USA. SUMMARY Gravity data were analysed to locate the boundary between a stable Saharan domain which is characterized by a shallow depth to basement and the Tunisian Atlas characterized
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The Structural & Tectonic Evolution of the Berkine-Ghadames Basin
Authors F.J. Gauthier, R.J. Hedley and S. McKennaS015 THE STRUCTURAL & TECTONIC EVOLUTION OF THE BERKINE-GHADAMES BASIN Anadarko has been successfully exploring in the Berkine Basin of Algeria for more than a decade and has access to an extensive seismic and well database including 4000 km 2 of contiguous 3d seismic coverage 12 000 Km of 2d seismic and over four hundred wells. The seismic data volumes and associated coherency time slices have been interpreted and integrated with the well data to better understand the structural history and stratigraphic development of the basin. Illizi Basin 1 Berkine-Ghadames Basin Basin Figure 1: Location Map showing major Tectonic Elements
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An Active Overthrust Belt and Associated Foredeep in the Chott Region of Central Tunisia – Some Implications for Hydrocarbon Exploration
Authors D.W. Klepacki and J.A. BatchelorS016 AN ACTIVE OVERTHRUST BELT AND ASSOCIATED FOREDEEP IN THE CHOTT REGION OF CENTRAL TUNISIA. SOME IMPLICATIONS FOR HYDROCARBON EXPLORATION Introduction 1 We view the topographical depression occupied by Chott El Gharsa Chott Jerid and Chott El Fajaj as an actively subsiding foredeep loaded by southward-verging overthrusts along the southern Atlas mountains in central Tunisian. Recognition of the foredeep geometry in the Chott region has implications for source maturation and play viability involving both Silurian and Jurassic source rocks. Modern earthquake seismicity uplifted alluvial fans and active deposition in the adjacent Chotts indicate the southern Atlas Mountains are actively uplifting.
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Late Cretaceous-Lower Eocene Structural and Subsidence Evolution in the Sahel Margin, Tunisia
Authors S. Khomsi, M. Bédir, H. Zouari and M.G. Ben JemiaS017 LATE CRETACEOUS-LOWER EOCENE STRUCTURAL AND SUBSIDENCE EVOLUTION IN THE SAHEL MARGIN. TUNISIA Abstract 1 Integrating different sources data for late Cretaceous-Palaeogene in oriental Tunisia permit quantify total subsidence subsidence rates and tectonic subsidence. The data sources are: outcrops well logs and regional seismic profiles. For the late cretaceous times we noted essentially eustatic accommodation. At the Palaeocene we noted tectonic and sedimentary subsidence in relation with local tectonic activity. At Lower Eocene times the subsidence seems to be of purely eustatic origin whereas at Middle to upper Eocene the tectonic subsidence increases. The mapping of thickness distribution compiled with
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New Techniques in Predicting and Risking Deepwater Nile Delta Prospects
Authors S.C. Bland, D. Roques and D.G. HodgeS018 NEW TECHNIQUES IN PREDICTING AND RISKING DEEPWATER NILE DELTA PROSPECTS 1 STUART BLAND DELPHINE ROQUES AND DAN HODGE Midland Valley Exploration Ltd. 14 Park Circus Glasgow G3 6AX United Kingdom Techniques are presented which enable the prediction of hydrocarbon prospects. Hydrocarbon migration studies enhanced by seismic attribute maps which define lateral changes in lithology allow the identified prospects to be risked in terms of charge and size. By assessing the changes and importantly the similarities in migration patterns at different stages of the prospect’s geological evolution increased understanding is gained on the key controls influencing prospect generation. Structural restoration
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Regional Structural and Stratigraphic Framework for the Eastern Mediterranean – Influence of Early Structure and Stratigraphy on the Development of the Levant Basin from Middle Jurassic to Recent
Authors M.A. Griffiths and M. FarrisS019 REGIONAL STRUCTURAL AND STRATIGRAPHIC FRAMEWORK FOR THE EASTERN MEDITERRANEAN – INFLUENCE OF EARLY STRUCTURE AND STRATIGRAPHY ON THE DEVELOPMENT OF THE LEVANT BASIN FROM MIDDLE JURASSIC TO RECENT Abstract 1 M. FARRIS and M.A. GRIFFITHS Shell U.K. Exploration and Production 1 Altens Farm Road Nigg Aberdeen AB12 3FY The Eastern Mediterranean is at present a frontier exploration province. There are currently no well penetrations in the deep water Levant Basin although recent seismic programmes have provided a framework upon which regional structural and stratigraphic interpretations can be built. Key events evident in Arabian Plate stratigraphy outcrop and well penetrations
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Improved Synthetic Well Ties in Deep Water Unconsolidated Turbidite Channels
Authors J. Faroppa, M. Noaman, E. Webb, R. Heath and T. KlimentosS020 IMPROVED SYNTHETIC WELL TIES IN DEEP WATER UNCONSOLIDATED TURBIDITE CHANNELS Abstract 1 JAMES FAROPPA 1 ; MAHMOUD NOAMAN 1 EDDIE WEBB 1 ROGER HEATH 1 THEODORE KLIMENTOS 2 *1 Rashpetco Joint Venture Company Building 18 Road 293 New Maadi Cairo Egypt *2 Sclumberger Logelco Inc. 25 Misr Helwan Rd Zeiny Tower Maadi Cairo Egypt Well to seismic ties are of critical importance in any study that attempts to match the wellbased depth data to the seismic time domain data. This is generally undertaken through a zero offset synthetic seismogram checkshot calibrated using the density and sonic logs and an
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Finding the Sweet Spots in a Large Under-Explored Block – Refocusing Exploration in the Northeast Mediterranean Deep Water Area
Authors E. Rowley, S. Hart, M. Gerrits, H. Meyer, M. Schwander, R. Demyttenaere, M. Nour El-Din, J. Stainforth and A. Abdel-AalS021 FINDING THE SWEET SPOTS IN A LARGE UNDER-EXPLORED BLOCK – REFOCUSING EXPLORATION IN THE NORTHEAST MEDITERRANEAN DEEP WATER AREA 1 To optimise Shell Egypt’s exploration strategy in the Nemed block a regional framework study has been completed involving calibration with the whole offshore Nile Delta. The current hydrocarbon discoveries in the area (c. 36 Tcf of gas) fall into a number of discrete trends. The aim of the study was to use a hydrocarbon system analysis to understand the controls on these trends. The remaining exploration ‘sweet spots’ have been predicted where the chances of optimal charge migration reservoir
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Flow Behavior Evaluation of the Static Reservoir Model in the Giant Ourhoud Field (Berkine Basin, Algeria)
Authors J. Salvadores, C. Carr, R. Reid, A. Martín, C. Yuste, J. del Moral, J. Malagón, A. Alaminos, T. Bartrina, J.L. Ruiz, C. Rossi and O. KälinS022 FLOW BEHAVIOR EVALUATION OF THE STATIC RESERVOIR MODEL IN THE GIANT OURHOUD FIELD (BERKINE BASIN ALGERIA) Ourhoud was one of the world’s largest on-shore oil discoveries in the nineties. The field is a structural trap bounded to the east by a major normal fault and elsewhere by three-way dip closure. The reservoir consists of TAGI amalgamated fluviatile sediments present in three major and distinct stratigraphic units (Lower Middle and Upper). They build-up into a complex and segregated reservoir system. 1 J. SALVADORES C. CARR R. REID A. MARTÍN C. YUSTE J. DEL MORAL J. MALAGÓN A. ALAMINOS T. BARTRINA
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Development of the Hassi Berkine South (HBNS) Giant Oil Field, Ghadames/Berkine Basin, Algeria
Authors P. Loader, J. Peffer, L. Bouazza, J. Thilliez, J. Rowney, W. Masino, M. Vickers, W. Brown, M. Pinel and H. MessaoudS023 DEVELOPMENT OF THE HASSI BERKINE SOUTH (HBNS) GIANT OIL FIELD GHADAMES / BERKINE BASIN ALGERIA 1 JOHN PEFFER LAKHDAR BOUAZZA JOEL THILLIEZ JOHN ROWNEY WILLIAM MASINO MICHAEL VICKERS WILLIAM BROWN and MARK PINEL Groupement Berkine Hassi Messaoud Algeria The HBNS field was discovered in January of 1995. Located within the Berkine Basin of Algeria the field lies approximately 200 km to the south east of the giant Hassi Messaoud field. The HBNS discovery well was located on 2D seismic data acquired in the early 1990’s thereafter followed by the acquisition of a 3D seismic survey in 1996. This dataset
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A Geological Overview of Four Giant Hydrocarbon Fields of Libya
Authors W. Ziza and F. BertelloS024 A GEOLOGICAL OVERVIEW OF FOUR GIANT HYDROCARBON FIELDS OF LIBYA Introduction 1 The exploration activity in Libya by the Italian ENI Company started in the late fifties. Nowadays the company is the major foreign oil and gas producer in the country: its production is from two giant fields Abu Attifel and Bouri and will be soon increased by that of two other giants - Al Wafa and Elephant – currently under development. This paper presents an overview of these four giant fields each of which is located in a different petroleum province of Libya. The exploration history the geology
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Giant Fields in the Sirt Basin, Libya
Authors M.I. Abuhajar and M. RoohiS025 GIANT FIELDS IN THE SIRT BASIN LIBYA Abstract The Sirt Basin with known recoverable reserves of 42-45 billion barrels of oil and 33 trillion cubic feet of gas ranks 15th among the world’s petroleum provinces. It covers an area of about 500 000 sq km in the north-central part of Libya and is characterized by regionally extensive NW-SE trending horsts and grabens (platforms and troughs). More than 25 large oil fields with an average of about 300 million barrels of recoverable oil; 16 giant fields with an average of 2000 million barrels recoverable oil; and at least one giant
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El Borma – Management of a Giant
Authors F. Ghaddab, M. Barbieri, M. Ali Fekih, B. Yahmadi, J. Zighni, N. Sabri and J. GuerboujS026 El BORMA – MANAGEMENT OF A GIANT SUMMARY 1 F. GHADDAB M. BARBIERI M. ALI FEKIH B. YAHMADI J. ZIGHNI N. SABRI and J. GUERBOUJ The evolution of technology has greatly affected the life of the oil fields and has helped in exploiting reserves which companies did not even foreseen at the time of development. Discovered in the early 60’s the El Borma field represents an example of longevity and capability of revamping itself by means of constant monitoring and innovation. The different phases of its life from natural depletion to water injection and extensive artificial lifting until horizontal
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Central Atlantic Tectonics in NW Africa – Implications for Hydrocarbon Potential
Authors I. Davison and M. TaylorS027 CENTRAL ATLANTIC TECTONICS IN NW AFRICA – IMPLICATIONS FOR HYDROCARBON POTENTIAL Central Atlantic Continental fit 1 We have produced a new continental fit of the Central Atlantic from Iberia to Guinea Bissau at the end of rifting (ca. 165 Ma) which relies on close matching of oceanic fracture zones and the ocean-continent boundaries between Mauritania and the US margin. Internal Mesozoic rifts strike-slip movements and extension of the Newfoundland Grand Banks area have been restored to improve the fit. Restoration of 650 km of right-lateral shear along the Gibraltar Fracture Zone produces an alignment of the Guadalquivir-Betic Salt Basin
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Regional Geology and Hydrocarbon Potential of Morocco – An Overview
By A.M. MorabetS028 REGIONAL GEOLOGY AND HYDROCARBON POTENTIAL OF MOROCCO – AN OVERVIEW 1 Hydrocarbons occur in Morocco throughout the sedimentary sequence from Paleozoic to Neogene and are represented by a variety of gas and liquid petroleums ranging from biogenic gas in the Rharb condensate in Essaouira light oil in Essaouira and Prerif to heavy oil in Tarfaya. In addition to a variety of seeps oil and gas shows have been encountered in most Moroccan sedimentary basins. Recent integrated studies based on substantial amounts of seismic geochemical and well data have permitted the development of many new exploration concepts in these basins.
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The Hydrocarbon Habitat of the Tarfaya-Lagwira Basin, Offshore Morocco
By M. NahimS029 THE HYDROCARBON HABITAT OF THE TARFAYA-LAGWIRA BASIN OFFSHORE MOROCCO 1 The Tarfaya-Lagwira segment located in southern Morocco is a part of the Eastern Atlantic passive margin.This zone covers a total area of about 200.000 sq Km comprising large shelf and deep-water zones. From Petroleum Exploration point of view this area is still under explored. The shelf was tested by only 4 wells while the deep water zone still untested up today. Exploration efforts conducted revealed that the area is characterised by the presence of a world-class source rock ( the Cenomano-Turonian Tarfaya shale ). Drilling activities during the seventies
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Petroleum Potential and Future Outlook of the Safi Offshore Area – A Segment of the Promising Atlantic Margin of Morocco
Authors A. Ait Salem, H. Jabour, S. Ait Brahim, A. El Ouataoui and M. IdrissiS030 PETROLEUM POTENTIAL AND FUTURE OUTLOOK OF THE SAFI OFFSHORE AREA – A SEGMENT OF THE PROMISING ATLANTIC MARGIN OF MOROCCO 1 A. AIT SALEM H. JABOUR S. AIT BRAHIM A. EL OUATAOUI and M. IDRISSI In the deep water areas of Safi Segment a thick Mesozoic to Cenozoic sedimentary section was deposited contemporaneously with intense salt tectonics leading to development of relatively large and highly subsiding basins between salt diapers on a graded slope. The near onshore Lower Cretaceous outcrops show several episodes of quartz rich influxes shed from Palaeozoic reliefs and transported into the basin through fluvial systems.
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