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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
81 - 100 of 162 results
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El Hamra Permit, Southern Tunisia – Application of Surface Geology to Oil Exploration
Authors L. Macchi, E. Caamano, D. Klepacki and R. SandmanS031 EL HAMRA PERMIT SOUTHERN TUNISIA – APPLICATION OF SURFACE GEOLOGY TO OIL EXPLORATION 1 L. MACCHI 1 E. CAAMANO 2 D. KLEPACKI 3 and R. SANDMAN 1 1 Reservoir Associates International Laburnum House Shocklach Cheshire SY14 7BT U.K. 2 Pioneer Natural Resources USA Inc. The El Hamra exploration permit is located some 50km north of the El Borma Field in southern Tunisia and covers an area of 5122km 2 of which approximately 3350km 2 is buried by sand dunes of the eastern flank of the Erg Oriental. This paper presents the results of a reconnaissance geological survey conducted in
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The Hydrocarbon Potential of the Golf of Hammamet Basin, Tunisia
Authors N. Brahim, S. Brahim and F. ZargouniS032 THE HYDROCARBON POTENTIAL OF THE GOLF OF HAMMAMET BASIN (TUNISIE) Abstract 1 N. BRAHIM* S. BRAHIM F. ZARGOUNI AUTHOR ECOLE NATIONALE DES INGENIEURS DE SFAX BP:W 3038 SFAX TUNISIEAddress The golf of Hammamet area could be considered as an attractive hydrocarbon province which is still hiding most of its hydrocarbon reserves. In fact all favorable conditions to generate big amount of hydrocarbon are satisfactory (presence of good source rock units high geothermal gradient good reservoir quality and favorable trapping mechanism). The Mactaris-1 well which penetrated a vertical column of 850 meters of bitumen at Serdj reservoir represents a sound
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Silurian Acacus Play in Ghadames Basin, Southern Tunisia
Authors K. Rourou, A. Ouahchi, A. M‘Rabet and M.H. AchecheS033 SILURIAN ACACUS PLAY IN GHADAMES BASIN SOUTHERN TUNISIA 1 KAMEL ROUROU ABDERRAHMEN OUAHCHI ALI M’RABET AND MOHAMED HEDI ACHECHE ETAP 27 bis Avenue Kheireddine Pacha BP 367 1002 Tunis Tunisia INTRODUCTION The Acacus play began in 1996 when the Oued Zar#1 well reentered by AGIP flowed 2500 BOPD from the low resistivity Upper Silurian Acacus sandstones. The reservoir has generally low resistivity values of less than 3ohm with some as low as 0.7ohms. Conventional logs analysis techniques calculate very high water saturations and are common reasons for potential zone to be bypassed or unrecognised. Re-evaluation of the reservoir based
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Characteristics of Recent Oil and Gas Discoveries in the Deep Water Portion of the Western Nile Delta, Egypt
Authors D. Phelps, J. Bedingfield, R. Roberts, T. Maher and T. DoddS034 CHARACTERISTICS OF RECENT OIL AND GAS DISCOVERIES IN THE DEEP WATER PORTION OF THE WESTERN NILE DELTA EGYPT 1 DAVID PHELPS 1 JOHN BEDINGFIELD 1 RON ROBERTS 1 TOM MAHER 1 and TIM DODD 2 1 Apache Egypt P.O. Box 27582 Houston TX 77227 2 BP Egypt Cairo Egypt Over the past 35 years more than 4.0 BBOE have been discovered in the Nile Delta primarily as gas and condensate. With the discovery of multi-TCF gas fields in the western Nile Delta interest in the deepwater Pliocene play has increased significantly in the past few years. In 2002 Apache
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Exploration on the Eastern Border of the Reggane Basin, SW Algeria – Are the Old Assumptions Still Valid?
Authors A. Chambers, M. Baene, R. Ferrando, I. Polonio, M. Rodrigo and E. FigariS035 EXPLORATION ON THE EASTERN BORDER OF THE REGGANE BASIN SW ALGERIA – ARE THE OLD ASSUMPTIONS STILL VALID? 1 M BAENA A.CHAMBERS R. FERRANDO I. POLONIO M. RODRIGO and E. FIGARI Repsol-YPF Exploarcion SA Paseo de la Castellana 280 28008 Madrid Spain Exploration activity in the Reggane Basin began in the late 1950s. Early wells encountered oil and gas shows at Strunian-Tournaisian and Visean C levels but the first discovery was done in the Reggane structure (1964) which flowed gas from Lower Devonian reservoirs. Continued exploration on trend led to further discoveries (Tiouliline (1980) and Azrafil (2000)) that also
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Paleozoic Petroleum Systems in Ghadames Basin, Southern Tunisia
Authors M.H. Acheche, H. Troudi, M. Ferjaoui and D. KebaierS036 PALEOZOIC PETROLEUM SYSTEMS IN GHADAMES BASIN SOUTHERN TUNISIA 1 HABIB TROUDI MOUNIR FERJAOUI DORSAF KEBAIER and MOHAMED HEDI ACHECHEI ETAP 27 bis Avenue Kheireddine Pacha BP 367 1002 Tunis Tunisia INTRODUCTION The Ghadames Basin is an intracratonic depression extending from western Algeria to Eastern Libya and encompassing the southernmost of Tunisia. It is a major hydrocarbon province as evidenced by the numerous producing fields. Until the mid-nineties most of the reserves occurred at the Triassic level. The contribution of Paleozoic horizons was insignificant and it was limited to three small size finds made in the Ordovician and in the
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Tectonic and Sedimentary Factors Controlling the Petroleum System of the Murzuk Basin, Libya
Authors F. Bertello, A. Fattorini and C. VisentinS037 TECTONIC AND SEDIMENTARY FACTORS CONTROLLING THE PETROLEUM SYSTEM OF THE MURZUK BASIN LIBYA Introduction 1 The Murzuk Basin lies some 800 km south of Tripoli and covers an area of about 350 000 km 2 . More than ninety exploratory wells have been drilled so far leading to the discovery of 21 commercial oil fields among which are the giant fields A-NC115 (“Sharara” Repsol operated) and F-NC174 (“Elephant” ENI operated). The primary petroleum play consists of the Upper Ordovician reservoir sandstones (Memouniat Fm. and part of the underlying Haouaz Fm.) and of the Lower Silurian shales (Tanezzuft Fm.) the
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A New Insight to the Hydrocarbon Potential of the RKF Field (Berkine Basin, Algeria)
Authors J. Navarro, T. Bartrina, I. Ferroukhi, C. Rosi, J.L. Ruiz and J. MalagónS038 A NEW INSIGHT TO THE HYDROCARBON POTENTIAL OF THE RKF FIELD (BERKINE BASIN ALGERIA) by Jorge Navarro* Teresa Bartrina* Ictyssem Ferroukhi** Carlos Rossi*** Jose Luis Ruiz* Jesús Malagón*. * CEPSA E&P Madrid Spain ** PED SONATRACH Algiers Algeria ***Dpt. Petrología y Geoquímica Instituto de Geología Económica (CSIC-UCM) Universidad Complutense Madrid Spain In 1992 the Sonatrach/CEPSA Association discovered the Rhourde El Krouf (RKF) oil field located in the Berkine Basin of eastern Algeria in the Erg Oriental region (Figure 1). The RKF-1 exploration well drilled to a total depth of 5 081 m tested a combined rate of 5 000
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3D Seismic Acquisition Covering Jakhira Oasis, Libya
More LessS039 3D SEISMIC ACQUISITION COVERING JAKHIRA OASIS LIBYA 1 Concession C96 with a surface area of 185 sq. km is located in the south-east of the Sirte Basin 450 kilometres south-west of Benghazi in Libya. Wintershall-Libya has a 100% interest in the concession in which two oil fields are present: As Sarah and Jakhira. As Sarah was discovered in 1989 and is a giant with over 1 billion barrels of OOIP in the Sarir reservoir (depth 12 000 feet) which consists of medium to coarse grained well-sorted sandstone deposited in the medial part of a sand dominated braided river system
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A Novel Approach to Processing Vibroseis/TZ Seismic Data – Teamwork Finds Good Solutions
Authors M.S. Al Nahhas, A.B. Al Jeelani, P. Fouchard, M. Boekholt, F. Al Shekaili, E. Kleiss, M. West, C. Tsingas and O. LangtonS040 A NOVEL APPROACH TO PROCESSING VIBROSEIS/TZ SEISMIC DATA – TEAMWORK FINDS GOOD SOLUTIONS Abstract 1 A large vibroseis survey over sand dunes and coastal plain and an adjacent dynamite/airgun near-shore transition zone survey were jointly reprocessed. The surveys cover two low-relief major oil fields. Key to the processing was deterministic zero-phasing for the vibroseis data and partly-deterministic partly-adaptive zero-phasing for the impulsive data before picking first-breaks for refraction statics. This was complemented by a hybrid residual refraction statics approach and careful stacking velocity picking including non-hyperbolic move-out correction. The result is a more reliable seismic image of these oil
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Seismic Acquisition in Sensitive Environment, Archeology and Visual Impac – Example of the NC 191 Block, Murzuk Basin, Libya
By O. WattezS041 SEISMIC ACQUISITION IN SENSITIVE ENVIRONMENT ARCHAEOLOGY AND VISUAL IMPACT – EXAMPLE OF THE NC 191 BLOCK MURZUK BASIN LIBYA In December 2001 TotalFinaElf E&P Libye (TEP Libye) started a 3400 km 2D seismic acquisition campaign on block NC191 in a desert area of the Murzuk basin in the southwest of Libya. Results from EBS and EIA studies showed that the environment is very sensitive and has a rich Paleolithic and Neolithic archaeological patrimony. 1 OLIVIER WATTEZ 1 FRANCIS CLEMENT 1 and MARIE PIERRE DUVAL-VALENTIN 2 TEP Libye decided to put a permanent archeological team of European and Libyan experts
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The Importance of Anisotropy for Prestack Imaging of Extensional Fault Systems
Authors B. Ver West, P. Hilton and D. WilkinsonS042 THE IMPORTANCE OF ANISOTROPY FOR PRESTACK IMAGING OF EXTENSIONAL FAULT SYSTEMS Introduction 1 The presence of anisotropy in the subsurface is a generally accepted but commonly overlooked concept in processing. When it is addressed usually only the effect on moveout is considered. This paper shows the importance of including anisotropy in imaging not only because it properly handles the long offset moveout but also because it correctly handles the focusing and spatial positioning which is subtler but may be even more important. The paper shows an imaging problem from the coast of the Gulf of Mexico. It is a
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Prestack Depth Imaging Onshore Libya
Authors C. Hanitzsch, B. van der Es and W. HeerdeS043 PRESTACK DEPTH IMAGING ONSHORE LIBYA Summary 1 Improved imaging below a complex fault zone more continuity of reflections better focusing of faults and less noise are achieved by anisotropic prestack depth migration of a case study in the eastern Sirte basin of Libya. The area studied is generally of low structural relief usually not typical of prestack depth migration projects but has complex faulting resulting in strong lateral changes in velocity. These were degrading the seismic image from the original standard time processing. The prestack depth imaging work showed at an early stage that the geology is anisotropic and
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Large Scale Fracturing, from Identification to Reservoir Model Integration – a Case Study
Authors D. Foulon, S. Delisle and Y. LagalayeS044 LARGE SCALE FRACTURING FROM IDENTIFICATION TO RESERVOIR MODEL INTEGRATION - A CASE STUDY Summary This paper describes a field case on a deep fractured onshore gas field where the challenges of characterising large size fracturing objects of primary dynamic impact despite a poor-quality seismic coverage have been overcome leading to a complete redefinition of the reservoir model. 1 Sources of information were extensively analysed : outcrops studies aerial photography and satellite imagery well imagery cores. These complementary but dispersed analyses were then put in coherence through the use of innovative tools developed in-house. The resulting synthesis enabled a proper
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Petrophysical Analysis in Reservoir Characterisation – Application in Triasic of Hamra Field – Gas Field Algeria
By R. BaoucheS045 PETROPHYSICAL ANALYSIS IN RESERVOIR CHARACTERISATION – APPLICATION IN TRIASIC OF HAMRA FIELD – GAS FIELD ALGERIA 1 R. BAOUCHE* * University Ahmed Bouguerra Faculty of Hydrocarbons and Chemistry. Avenue del’indépendance.35000 Boumerdès Algéria ABSTRACT This study shows the role of Wireline pterophysical analysis as a Tool in reservoir characterisation of the shaly sands in Sahara. This paper examines the use of log analysis and mean petrophysical reservoir parameters as Tool to determine is successfully establishing reservoir architecture and fluid-flow trends. Using the data log of Gamma_Ray Neutron density sonic and resistivity for petrophysical analysis to correlate some layers in the
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Validation of Theoretical Coning Models Using Numerical Single-Well Simulation
Authors S.M. Alakhdar, A.A. Urayet and M.A. BenrwinS046 VALIDATION OF THEORETICAL CONING MODELS USING NUMERICAL SINGLE-WELL SIMULATION Abstract 1 SALEM M. ALAKHDAR* ABDELHAMEED A. URAYET** and MABRUK A. BENRWIN** Water coning is often a serious operational problem in oil formations producing with strong bottom water drive. In Libya many of the oil reservoirs have water coning problem. The production theory in such fields would normally consider limitation of the production rate to a certain minimum (critical rate) to prevent water cone from happening. However since such a rate is normally very small (i.e. not economical) the company will be producing at a higher rate and it becomes
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Sedimentology and Petrophysics in the Reservoir Characterization of the Ourhoud Field, Algeria
Authors N. Lee, A. Oudjida, C. Howells and K. CorriganS047 SEDIMENTOLOGY AND PETROPHYSICS IN THE RESERVOIR CHARACTERIZATION OF THE OURHOUD FIELD ALGERIA 1 NICK LEE AZIZ OUDJIDA CHRIS HOWELLS and KEVIN CORRIGAN Anadarko Algeria Company LLC The Ourhoud Field is one of the largest oil discoveries of recent times in the Algerian Berkine Basin containing more than 2 billion barrels of oil in place. The reservoir interval is within sandstones of the Triassic Argileux Greseux Inferieur Formation (TAGI). These are characterised by a complex sequence of fluvial lacustrine lacustrine-deltaic aeolian and palaeosol facies associations. The complexity of this continental depositional system as a reservoir is further enhanced by the
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Chemostratigraphy and Correlation of a Chalk Petroleum Reservoir – Case of the Campanian-basal Maastrichtian Abiod Formation in Tunisia
Authors A. Mabrouk, I. Jarvis, R.T.J. Moody, H. Belayouni, A. Ben Brahim and S. De CabreraS048 CHEMOSTRATIGRAPHY AND CORRELATION OF A CHALK PETROLEUM RESERVOIR – CASE OF THE CAMPANIAN-BASAL MAASTRICHTIAN ABIOD FORMATION IN TUNISIA 1 A. MABROUK 1 2 I. JARVIS 2 R.T.J. MOODY 1 H. BELAYOUNI 2 A. BEN BRAHIM and S. DE CABRERA 3 1 School of Earth Sciences and Geography Centre for Earth and Environmental Science Research Kingston University Penrhyn Road Kingston upon Thames Surrey KT1 2EE UK 2 Département de Géologie Faculté des Sciences de Tunis Campus Universitaire 1060 Tunis Tunisie 3 PDVSA Exploracion y Produccion Introduction In Tunisia Campanian-Maastrichtian chalky limestones constitute reservoir rocks in several oil fields (Sidi el
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The Application of Borehole Imaging in Appraising a Triassic (TAGI) Fluvial Reservoir, the Ourhoud Field, Berkine Basin Algeria – Constraining the Reservoir Model Build
More LessS049 THE APPLICATION OF BOREHOLE IMAGING IN APPRAISING A TRIASSIC (TAGI) FLUVIAL RESERVOIR THE OURHOUD FIELD BERKINE BASIN ALGERIA – CONSTRAINING THE RESERVOIR MODEL BUILD Abstract 1 The Ourhoud Field is located in the Berkine intracratonic basin of Algeria (Fig. 1). The field discovered in 1994 straddles Blocks 404 405 and 406a and is expected to contain recoverable reserves in excess of 1 billion barrels making it the second largest oil field in Algeria. The Triassic Argilo-Grèseux inférieur (TAGI) reservoir is subdivided into three lithostratigraphic intervals (Fig. 2): • Lower TAGI • Middle TAGI • Upper TAGI T. GLOVER 1
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Continuous Coring of a Slim-Hole, a Cost Effective Exploration Alternative?
By E. CaamanoS050 CONTINUOUS CORING OF A SLIM-HOLE A COST EFFECTIVE EXPLORATION ALTERNATIVE? Introduction 1 The statement “In the final analysis oil is first found in the mind” (Wallace Pratt 1952) recognizes that discovery is rooted in the imagination of the geoscientist. This is true only because our understanding of the truth is so limited that for any given set of facts only our imagination can restrict our ability to generate innovative geological concepts that honor the data and may still lead to the discovery of a new hydrocarbon accumulation. Pratt’s memorable quote captures the essence of Thomas C. Chamberlain’s thesis presented
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