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EAGE/AAPG 3rd Research Symposium - Developing and Managing Turbidite Reservoirs
- Conference date: 03 Oct 1998 - 09 Oct 1998
- Location: Almeria, Spain
- ISBN: 978-94-6282-120-0
- Published: 03 October 1998
21 - 40 of 43 results
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Development and Management of Turbidite Reservoirs in Campos Basin, Brazil
Authors W. B. Maciel, C. Del Lucchese Jr., C. A. G. Córa and A. C. C. PintoCampos basin is located in southeastern Brazil, offshore Rio de Janeiro state. The basin covers an area of about 100,000 km², from the coast to the 3400 m isobath, and contains a maximum sedimentary thickness of about 10 km. Campos basin evolution from the Lower Cretaceous period to present day can be divided into three megasequences, as shown on Figure 1: (1) Non-Marine Megasequence, which comprises Neocomian basalts and lacustrine sequences; (2) Transitional Megasequence, which includes evaporites and associated siliciclastic deposits developed during the Aptian; and (3) Marine Megasequence represented by Albian carbonates at the base, overlain by two siliciclastic sequences: a transgressive (Upper Albian to Lower Tertiary) and a regressive (Lower Tertiary to present).
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Reservoir Architecture in Recent and Subsurface, Deepwater Meandri-Channel and Related Depositional Forms
Authors V. Kolla, P. Bourges, J. M. Urruty, D. Claude, M. Morice, E. Durand and N. H. KenyonMeandri-channelforms are typical of the turbidite systems, fed by mud-rich terrigenous sediment sources. Based on 2D high-resolution and 3D seismic, side-scan imagery, wireline logs and cores of several examples worldwide, we present here a synthesis and summary of the meso- and larger-scale reservoir architectures of the recent and subsurface meander channels and related depositional forms: levee-overbank and lobe fonns. Reservoir architecture here includes morphology, geometry and intemal stacking of reservoir-prone lithologic facies of the different depositional forms.
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Post-Burial Deformation of Clastic Series, Mechanisms and Impact on Reservoir Geometry
More LessPost-depositional, post-burial in situ defonnation of siliciclastic series is increasingly recognised as a common phenomenon affecting deep-water sediments. Well-known postburial features include sand sills and dykes, mud volcanoes, the former largely reported from the Palaeocene of the North Sea (e.g. Jenssen et al., 1993, Dixon et al., 1995) ; another related feature, more recently identified, is the large-scale polygonal pattem that affects thick basinal shale series in the North Sea and other areas (Cartwright, 1994, 1995, 1996).
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3D Sedimentary Evolution of a Turbidite Channel Reservoir (Early Miocene-Age) of the Baudroie Marine and Baliste Fields, Offshore, Gabon
Authors J. P. Wonham, S. Jayr, P. Chuilon and R. MougambaConstruction of a 3D geological model from seismic and weIl data has led to an improved understanding of the 3D sedimentary evolution of meandering turbidite channel reservoirs in the Mandorove Formation (early Miocene-age) of offshore Gabon. The data used by this study comes from the Baudroie Marine and Baliste fields. The reservoir is a low net-to-gross unit up to 450 m thick. Numerous sandstone bodies (10- 50 m thick) in a background of shale are recognised in this interval from weIl data. Standard seismic stratigraphic study has defined the architecture of the reservoir interval. The reservoir body has a ribbon-like geometry. At the margins of the body, a series of stacked erosion surfaces are recognised, however it is difficult to trace these erosion surfaces into the interior of the body. The reservoir is situated between two radioactive shale horizons.
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Turbidite Giants - Lessons from the World's 40 Largest Turbidite Discoveries
More LessWhat are the ingredients that make a giant turbidite field? This question is important as industry focuses on global deep water plays, because, although turbidites are not the only reservoir type of deep water plays, they are the primary reservoir type in deep water. This has been recently reinforced by deep water drilling in Brazil, the Gulf of Mexico, and West Africa.
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Geology of the Miocene Lower Rudeis Deepwater Sandstone Reservoir, Gulf of Suez
More LessThe lower Rudeis deep water sandstone lies within the subsurface of the central Gulf of Suez, Egypt, and is a significant reservoir at July Field. It was deposited during a major period of tectonic subsidence and eustatic sea level rise. As such, it is an interesting end member in the myriad world of deep water reservoirs.
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Deepwater Sedimentary Systems - New Models for 21st Century
More LessAs exploration for hydrocarbons moves into progressively deeper waters and as production comes on line trom an ever increasing number and variety of turbidite-related plays, it is essential that we critically appraise existing models for deep-water sedimeIitary systems, The turbidite paradigm is 50 years old and everything trom a 1 cm thick silt-Iaminated mudstone bed to a 50 m thick boulder-pebble-sand graded megabed has been called a turbidite. The contourite paradigm is 35 years old and there remains an enormous controversy surrounding the recognition of fossil contourites in ancient series. The submarine fan model is 30 years old and, in its heyday, almost any ancient turbidite succession was interpreted as part of a fan system, typically with reference to thinning-upward or thickening upward sequences of bedthickness variation.
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Microseismic Gravity Research for Delineation of Turbidite Reservoirs - A Status Report With Recent Field Data
Authors V. G. Budanov, A. B. Beklemischev, G. A. Maximova, O. A. Potapov and B. S. LokshinWe present the new data of the delineation of turbidite reservoirs and connected fault zones based on the simulataneous registration of the readings of a specially selected group of high precision gravimeters and measurement of natural microseisms. We discovered and investigated the phenomenon of influence of extremely low vibration (with the amplitude below 10 nanometers) on the position of the pendulum of sensitive system of high-precision gravimeters as early as 70-s. The influence of vibration was confined to the frequency band of 30-200 Hz and had a resonance character. We attempted to use the resonance reaction of different gravimeters to microseisms for the delineation of the hydrocarbon reservoirs (including turbidite ones).
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Modelling the Effect of Turbidite Amalgamation on Reservoir Flow Properties Using Outcrop Data
Authors K. D. Stephen, J. D. Clark and T. R. GoodSheet-like clastic deposits form in a variety of deep-water environments and are significant reservoirs for hydrocarbons. Outcrop observations show howeve that there is a considerable variability in the geometry and intemal connectivity of sandstone beds that form sheet-like turbidite units. These genetic units are differentiated by distinct bed geometry and facies characteristics, such as thin-bedded low net-to-gross systems (e.g. levee units), and thick bedded high net-to-gross systems (e.g. proximal sandy lobe units). In these systems the principal heterogeneities considered to affect hydrocarbon recovery are the distribution of facies with highly contrasting permeabilities and the degree of lateral and vertical connectivity of pay zones. These heterogeneities arise from the interbedding of sandstone and genetically related shale caps resulting from the deposits of discrete turbidity current events. Depending upon the erosive potentialof successive turbulent flows, shale caps can be locally preserved or removed, the latter resulting in improved vertical connectivity ofthe reservoir.
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Producibility of Turbidite Reservoirs - A Comparison of the North Sea and Gulf of Mexico
By S. CosseyMuch of the focus of current hydrocarbon exploration is in frontier areas of the world where deepwater clastic reservoirs are expected to be found. Exploration for these reservoirs has recently been conducted in areas such as West Africa, the Gulf of Mexico and the West of Shetlands where major accumulations have been found. However, deepwater clastic reservoirs are architecturally complex, making the process of appraising new discoveries a difficult balance between understanding the reservoirs and minimizing the number of expensive appraisal wells. It is therefore increasingly important to understand the lessons that can be learned from analogue fields and reservoirs. It is these analogues that provide us with a range of uncertainty for producibility and performance in architecturally different reservoirs such as sheet sands, channels and levees.
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Generic Components of Deepwater Clastics - Building Blocks for the Subsurface from Modern and Ancient Analogue Data
More LessAnalogue data for subsurface modelling of deep-water clastic reservoirs are often not collected or transferred in a suitable format. Though published data and many ongoing research projects provide information which could be used in subsurface prediction, different companies with similar prospects are producing diametrically opposed reservoir models from the same information. The principal reasons for this appear to be: (i) scale and type of data collected from the analogue, and how this is transferred to the reservoir modelling system (data format); (ii) reliance on end-member geologic models to reconstruct the subsurface (model forcing); and (iii) the analogue specialist's preoccupation with the 'uniqueness' of their analogue system (lack of generic focus).
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A Novel Geochemical Correlation Technique - Application to a Turbidite Reservoir
Authors A. J. Hartley, A. Hutchison, M. J. Hole and D. BoydThree cores in a Tertiary deep marine reservoir succession from the UKCS have been analysed using trace element geochemistry and petrography in order to: 1) assess the broad relationships between the wells, 2) to produce a high resolution reservoir zonation scheme and 3) to make correlations where appropriate. The trace element geochemical technique, developed at the University of Aberdeen, is based upon the presence of characteristic immobile trace elements in certain heavy mineral species.
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3D Architecture of Turbidite Reservoirs from Outcrop Analogues in the French Alps and Application to Brazilian Fields
Authors P. Joseph, O. Gomes De Souza Jr., R. Eschard, D. Granjeon, O. Lerat and C. RavenneThe Eocene Annot Sandstone in the French Alps corresponds to a turbiditic system up to 1000m thick, which has filled large morphologic gutters induced by tectonic activity. Detailed field studies have recently been undertaken on well-exposed 3D outcrops at a reservoir scale (kilometric), in order to analyse and reconstruct the architecture of deep-marine gravity deposits. These selected sites belong to different sedirnentary settings (inner fan valley, channel-levee system, depositional lobes) and different morphological configurations (narrow trough controlled by faulting, unconfined basin), and they exhibit a large variety of facies (slumps, debris-flows, high and low density turbidites).
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A Multidisciplinary Approach to Sedimentological Modelling and Reservoir Characterization - Andrew A1 Sandstone, Central Graben, North Sea
Authors B. Kneller, B. Mccaffrey, I. Knight, E. Hailwood and R. BayesThe Palaeocene Al reservoir is located in blocks 30/7a and 30/13, and contained within a metre-scale thickness sand interpreted as the deposit of a single event: the A1 sand. Reservoir-interval core was taken from seven wells, and was subject to sedimentological, micropermeametry and AMS (anisotropy of magnetic susceptibility) analysis.
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Claymore Field, North Sea - Integrated Seismic Stratigraphy, Depositional Models and Reservoir Mapping
Authors A. F. Gordon, V. Kolla and R. CooperDelineation and mapping of reservoir compartments within Northem Area Claymore (NAC) has proved difficult to reconcile with reservoir engineering data. An integrated seismic stratigraphy study was undertaken to solve this problem.
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Slumping, Sliding and Basin Floor Physiography - Controls on Turbidite Deposition and Fan Geometries in the Paleocene Gran Field Area, Block 25/11, Norwegian North Sea
Authors O. J. Martinsen, G. Indrevær, T. Dreyer, G. Mangerud, A. Ryseth and L. SøysethUpper Paleocene reservoir units of the Grane Field area in the Viking Graben in the Norwegian sector of the North Sea occur in two submarine fan systems of widely variable geometry.
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Reservoir Architecture of Deepwater Slope Apron Deposits of the Cuesta Creek Member, NW Territories, Canada - an Outcrop Analog for Cretaceous Deepwater Reservoirs on the North Slope of Alaska
Authors W. R. Morris, M. D. Myers, R. Hannon, D. Bannon and M. H. ScheihingSummary not available
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Devonian Turbidites in Dnieper-Donets Depression - the Genesis and Oil/Gas Bearingness
Authors V. I. Savtchenko, M. B. Politshuk and V. A. PupovFor a long time there existed an opinion of inherited structure of all Paleozoik horizons from Devonian till Permian including within the Dnieper - Donets depression. They admitted differences only on places of halogenesis active development. The accumulation of facts and the lack of essential oil/gas fields discoveries in the Devonian sediments only compiled to doubt in correctness of this idea.
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Outcrop-Behind Outcrop Characterization of Thin-Bedded Turbidites for Improved Understanding of Analog Reservoirs - New Zealand and Gulf of Mexico
Authors R. M. Slatt, G. H. Browne, G. R. Clemenceau, R. J. Davis, R. A. Young, H. Anxionnaz and R. J. SpangA 200m high by 10km long coastal cliff section of the Late Miocene Mt. Messenger Formation, New Zealand consists of 200+ meters of mainly thick-bedded turbidite fan sands overlain by 300m of thin-bedded slope fan, levee/overbank sands/silts.
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From Geologic Characterization to 'Reservoir Simulation' of a Turbidite Outcrop, Arkansas, USA
Authors R. M. Slatt, A. Al-Siyabi, C. W. Van Kirk and R. W. WilliamsDetailed geologic mapping and correlation of several outcrop exposures and subsurface core borings of the Lower Pennsylvanian, upper Jackfork Group in the DeGray Lake Spillway-Intake area of Arkansas have allowed us to develop a 5,600ft. X 1,600ft. X 90ft.
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