The lithologies observed within this sequence are siltstones and sandstone. A. Inset is the Ricker wavelet displaying the amplitude and the frequency of the seismic lines used for this study. The seismic lines used for the analysis of the depositional sequences are L1 (North), L2 (Central) and an inline L3 (South) (Fig. 5a). a–c Turonian seismic facies configurations and calibrated gamma-ray log with the lithology interpretations at well positions along the N-S profile. a–c (a) Location map of the study area showing the South American and African plates as part of West Gondwana, and the position of the Orange Basin (shaded yellow circle) in the late Jurassic (Figure modified from Lutgens and Tarbuck, 2014). The seismic–well tie shows the depth function Z (m) (Fig. This sequence appears to have been deposited as an incised-valley fill in the study area. 3D seismic data can yield a wealth of geologic information through the integration of seismic stratigraphy and seismic geomorphology. Patterns associated with deep-water deposits including turbidite, mass transport, and sediment wave deposits, and shallow-water to continental deposits including shoreface, aeolian, and fluvial deposits will be shown. Start by marking “Seismic Stratigraphy: Applications to Hydrocarbon exploration (Memoir 26)” as Want to Read: whether the fill is sand or shale prone Application of seismic geomorphol ogy and stratigraphy of depositional elements in de ep-water settin gs, detailed seismic interpretati on and analysis of key Application of seismic stratigraphy in reservoir characterisation: a case study of the passive margin deposits of the northern Orange Basin, South Africa, http://creativecommons.org/licenses/by/4.0/, https://doi.org/10.1007/s13202-020-01050-9. Note seismic facies mapped in this sequence are Sub-parallel/Parallel (SF5), Hummocky (SF2) and Chaotic (SF4). 6b). (b) Map of the Orange Basin showing the wells, seismic data and geological features. Papers from a research symposium at the 1975 American Association of Petroleum Geologists and supplemented by later reports became “Seismic Stratigraphy Applications to Hydrocarbon Exploration”, one of AAPG’s best-selling book publications. 11). 8), indicating shelfal deposition. The southern part displays low-amplitude, chaotic clinoforms (SF4) (Fig. Most recently, he has employed an interdisciplinary approach to the prediction of lithofacies distribution through time and space by integrating stratigraphy, geomorphology, depositional systems analysis, and sequence stratigraphy, using 3D seismic visualization integrated with borehole data. 7c). Previous studies of the southern Orange Basin (Samakinde et al. Correspondence to On the left are the conceptual representations of the seismic facies. In this study, due to a lack of available cores, a lithology log interpreted from the gamma-ray (GR) log was integrated with seismic facies analyses to infer the palaeo-environments within the study area. a–c Barremian-Aptian seismic facies configurations and calibrated gamma-ray logs with the lithology interpretations at well positions along the N-S profile. This is evident with the Ibhubesi tight gas discovery in the southern part of the basin (Petroleum Agency SA Report 2006). Finally, six seismic facies units are recognised based on clinoform reflection configurations and geometry, viz. a–c Albian Seismic facies configurations and calibrated gamma-ray log with the lithology interpretations at well positions along the N-S profile. a–c The three seismic profiles; L1(A84-007), L2 (SA92-106) and L3(2370) in TWT (s) and the respective gamma-ray logs of the control wells (A1 and A2) in the Northern and Southern section. J Geol Soc London 154:465–470, Guiraud R, Bosworth W (1997) Senonian Basin inversion and rejuvenation of rifting in Africa and Arabia; synthesis and implications to plate-scale tectonics. The shale deposits are linked to the anoxicity that prevailed during the Aptian marine transgression (Jungslager 1999). Horizontal length of each seismic section is 3 km each. B. 10a–c). The successful application of this technique serve to encourage exploration in the Niger Delta Basin by adopting strategies where seismic stratigraphy will be the most likely means to provide drilling targets to more independent operators. De Vera J, Granado P, Mcclay K (2010) Structural evolution of the Orange Basin gravity-driven system, offshore Namibia. A (North), B (Central) and C (South). 7a–c). 1994) supplied by the Orange, Olifants and Berg rivers (Brown et al. 2017; de Vera et al. In conclusion, the integration of seismic and lithofacies analyses delineated some reservoir prospects (Albian and Barremian-Aptian), particularly in the northern section of the current study area. Henry W. Posamentier discusses the application of 3-D seismic stratigraphic analyses to the mitigation of risk associated with lithology prediction prior to drilling – workflows and techniques. They are Tangential-Oblique (SF1), Hummocky (SF2), Wavy-Parallel (SF3), Chaotic (SF4), Sub-parallel/Parallel (SF5) and Divergent (SF6). J Sediment Res 82:723–746. The calibration of these observations with the gamma-ray log signatures indicates a coarsening-upward prograding sand deposit suggestive of pro-delta shoreface sands in the North (Fig. 3). 4). 1977; Vail 1987; Cross and Lessenger 1988; Catuneanu 2006). SF5 facies is prominent in the Maastrichtian/Campanian sequence, indicating that the deposition of sediments may have been accompanied by uniform margin subsidence after the Late-Cretaceous uplift of the Africa margin. #570, 400 – 5th Ave SW 1997, 1998 and Bauer et al. 11b). The Etendeka Basalt, found in the northern part of the Orange Basin, is evidence of this volcanism (de Vera et al. a–b (a) The localised chronostratigraphy of the Orange Basin (within study area) detailing the major sequences mapped (SQ7-SQ1) for this study and the events that characterised the evolution of the Western Margin. On the left are the conceptual representations of the seismic facies. 2). Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The Barremian-Cenozoic depositional sequences in the northern Orange Basin, SW, South Africa, were investigated using the principles of seismic stratigraphy to understand the interplay of tectonics and sedimentary processes in the distribution of potential hydrocarbon reservoirs. The Orange River supplied sand-rich sediments to the northern part of the Orange Basin around 103 Ma as a result of the reworking of the delta front and marine storm channel bars, as well as wave action effects (Brown et al. These sequences consist of deltaic and fluvio-marine deposits especially in the distal parts which led to a south-easterly distribution of sediments (Gerrard and Smith 1982), causing deposition in an elongated depocentre accompanied by basinward progradation (Dingle et al. American Association of Petroleum Geologists Memoir, London, pp 49–74, Gladczenko TP, Skogseid J, Eldhom O (1998) Namibia volcanic margin. https://doi.org/10.1007/s13202-020-01050-9, DOI: https://doi.org/10.1007/s13202-020-01050-9, Over 10 million scientific documents at your fingertips, Not logged in How to Understand the Earth. The Petroleum Agency South Africa is appreciated for providing the data used and Schlumberger for providing software support. Part of Springer Nature. This was done in order to compare interpretations of depositional environments made from both the seismic-and well data. This could indicate uniform subsidence of the African margin after the late Cretaceous uplift. There is no exploration well drilled in the central part of the seismic profile (L2); hence, there is no available well log to compare and validate the analysis of the seismic sequence. 7a) which changes into high amplitude and divergent clinoforms (SF6) in the central part (Fig. The horizontal length of each seismic section is 2.5Km. He has served as an AAPG Distinguished Lecturer to the United States (1991-1992), an AAPG Distinguished Lecturer to the former Soviet Union (1996-1997), an AAPG Distinguished Lecturer to the Middle East (1998-1999), and an AAPG Distinguished Lecturer to Europe (2005-2006). The simulation uses a kriging indicator, which is determined by taking an average frequency and variation of the discrete spatial continuity. This is coupled with the serration of the log as observed around 400 m, indicating a storm and wave-dominated shelf environment (Fig. Wednesday, March 10th, 2021 – 12:00 PM MST J Afr Earth Sci GSA 11, abstracts 33, Jungslager E (1999) Petroleum habitats of the Atlantic margin of South Africa. Turbidites Characterization from Seismic Stratigraphy Analysis: Application to the Netherlands Offshore F3 Block* E. Illidge1, J. Camargo1, and J. Pinto1 . Dr. Posamentier has published widely with research interests in the fields of sequence stratigraphy and depositional systems analysis.  This … The SF4 suggests dominance of a high-energy environment accompanied by mass transport of sediments, while the SF2 represents strata forming as small lobes in a pro-deltaic environments. 2). The divergent clinoforms in the Albian sequences point to lateral variations in the rates of deposition, which cause thickening of the individual reflection units inward of the basin (progradation). Typically, a potential stratigraphic reservoir is expected to be bounded at the top and bottom by an impermeable lithology, which often is shale or a calcareous siltstone. A (North), B (Central) and C (South). These parameters, together with structural or stratigraphic closures, are essential in prospect identification. This suggests shelfal deposition and an indication of sediments deposited on a uniformly subsiding shelf. Sequence stratigraphy and seismic data are used to define spatial trends in the proportion of cemented beds; sequence stratigraphy provides the vertical constraints, and seismic data provide lateral constraints. WEBINAR. The seismic facies of the Maastrichtian/Campanian sequence unit exhibits sub-parallel (SF5) low–medium–high-amplitude clinoform configurations in the northern, central and southern parts, respectively (Fig. 7b). J Geophys 44:31–60. Next, the seismic facies between bounding unconformities are characterised based on the amplitude, continuity and character of reflections of the various depositional sequences (e.g. SF4 is dominant within the Barremian-Aptian sequence and expressed in an incised valley fill, suggesting mass transport deposition accompanied by strong hydrodynamic conditions. The calibrated gamma-ray log displays a ‘saw teeth’-like serration, which indicates the influence of waves and storms, a phenomenon common on the shelf (Fig. The tangential-oblique reflection configuration represents a prodelta shallow slope deposit, which typically contains a terrigenous mix of sand, silt and clay (Badley 1985). The Santonian and Coniacian Sequences are not mapped as they are not deposited within the study area. Pub. 4). application of sequence stratigraphy in seismic interpretation has proven to be fundamentally important to predict traps; spatial distribution of reservoir, seal, source rocks and also in the basin analysis. On the left are the conceptual representations of the seismic facies. 3). Part 2: the depositional sequence as a basic unit for stratigraphic analysis, In: Payton, C.E. Elsevier Radarweg Publishing, AE Amsterdam, pp 42–54. This was done by calibrating sonic, density, check shots and formation tops data to establish a time depth relationship between wells and seismic data and to generate a velocity log. On the left are the conceptual representations of the seismic facies. 6c). Horizontal length of each seismic section is 2 km. Zhu Y, Bhattacharya JP, Li W, Lapen TJ, Jicha BR, Singer BS (2012) Milankovitch-scale sequence stratigraphy and stepped forced regressions of the Turonian Ferron Notom deltaic complex, south-central Utah, USA. Mitchum Jr., R.M., Vail, P.R., And Thompson Iii, S., 1977, Seismic stratigraphy and global changes of sea-level. 9b), while the facies unit in the southern part indicates moderate–high-amplitude chaotic reflection (SF4) configurations (Fig. These logs were spliced to obtain a continuous run in the two wells (A1 and A2), and seismic horizons were mapped from the well positions after an initial seismic well-tie had been performed (Fig. A fining-upward sequence as seen on the gamma-ray log in the South indicates back-stepping of sediment deposition around 600 m (Fig. Proceedings of the 7th Petroleum Geology Conference, pp 823–830, Lutgens FK, Tarbuck EJ (2014) Essentials of Geology. In summary, the seismic facies units dominant in this sequence are hummocky (SF2), divergent (SF6) and chaotic (SF4) reflection configurations. International Human Resources Development Corporation, Boston, p 266, Bauer K, Neben S, Schreckenberger B, Emmermann R, Hinz K, Fechner N, Gohl K, Schulze A, Trumbull RB, Weber K (2000) Deep structure of the Namibia continental margin as derived from integrated geophysical studies. America Association of Petroleum Geology Studies in Geology, Tulsa, pp 1–10. 11a). A further proof of this is seen in the northern part of our study area because of the serration of gamma-ray log seen in well A1 (Figs. At least 30 third-order post-drift sequences were deposited during the Cretaceous, with a total thickness of some 8 km in the depocentre (Brown et al. Application of Seismic Reflection Configuration to Stratigraphic Interpretation - 16 papers, plus a Glossary of Seismic Stratigraphy Stratigraphic Models from Seismic Data - 5 papers Product Code: Applications of seismic stratigraphy and seismic geomorphology – maximizing the value of 3D seismic data for exploration and production. 1996). 8a–c), suggestive of a uniformly subsiding shelf, coupled with uniform rates of deposition. On the left are the conceptual representations of the seismic facies. The 2e of Seismic Stratigraphy and Depositional Facies Models summarizes basic seismic interpretation techniques and demonstrates the benefits of integrated reservoir studies for hydrocarbon exploration. The incised-channel fill is equally observed on the gamma-ray log signature in the northern section of the sequence at around 3300 m (Fig. J Appl Geophys 9:1362–1376, Gerrard I, Smith GC (1982) Post-Paleozoic succession and structure of the south-western African continental margin. J Marine Geophys Res 20:313–341, Gladczenko TP, Hinz K, Eldholm O, Meyer H, Neben S, Skogseid J (1997) South Atlantic volcanic margins. Earth Sci Rev 91:1–26, Article  Primary seismic reflections are generated by physical surfaces in the rocks, consisting mainly of stratal (bedding) surfaces and unconformities with velocity- density contrasts. J Geophys Res 25:829–853, Bradley DC (2008) Passive margins through earth history. 2010). Vail PR (1987) Seismic stratigraphy interpretation procedure. PubMed Google Scholar. This course is designed to enhance interpretation skill sets with regard to geologic interpretation of seismic data. 9a). The South American and African plates were part of West Gondwana until the late Jurassic (Fig. 12 A cross section of the seismic lines (L1, L2 and L3)) and lithofacies integration showing lithology distribution across the study area. J Tectonophys 282:39–82, Hartwig A (2014) Hydrocarbon migration and leakage dynamics of the Orange Basin, South Africa. Henry W. Posamentier is a worldwide consultant in seismic and sequence stratigraphy with a focus on lithofacies prediction risk issues. INTRODUCTION Seismic stratigraphic analysis is based on identification and correlation of the sequence- bounding surfaces on seismic reflection profiles. Horizontal length of each seismic section is 2 km. 1), preserves a remarkably complete sedimentary record because the depositional system was seldom affected by tectonic forces, apart from gravity flow (Rebesco et al. 6c). ISBN 978-953-51-3675-0, eISBN 978-953-51-3676-7, PDF ISBN 978-953-51-4587-5, Published 2017-12-06 Six seismic facies were mapped based on the reflection configurations listed in Table 3. The reader is taken from a basic level to more advanced study techniques. The objectives of this study are: (1) the analysis and interpretation of seismic sequences and facies within a chronological framework to infer sedimentary environments of the deposits. 6a). An evidence of a uniformly subsiding continental shelf during the Albian period is seen in the northern part of our study area because the Albian sequences (SQ5 and SQ6) are deposited as sub-parallel clinoforms (SF5) (Figs. The chaotic (SF4) (South) clinoforms equally suggest soft sediments deformation because of highly variable energy environment accompanying sediments deposition during this period (Fig. He was a Senior Geological Advisor with Chevron Energy Technology Company serving as a consultant to exploration and development business units on a wide range of geological issues, prior to retiring in 2014. Fig. The SF2 configurations in the Central part could represent strata forming as small clinoform lobes in a pro-deltaic environment, while the SF3 represents shelfal deposits accompanied by strong wave action. Seismic stratigraphy in conjunction with seismic geomorphology, calibrated by borehole data, has elevated the degree to which seismic data can facilitate geological interpretation. Henry W. Posamentier discusses the application of 3-D seismic stratigraphic analyses to the mitigation of risk associated with lithology prediction prior to drilling – workflows and techniques. Applications and Interpretive Technique developed through 70's a. The Orange Basin situated on the passive western margin of South Africa (Fig. Application of Seismic Stratigraphy, Multi-attribute Analysis and Neural Networks to Mitigate Risk in New Exploration Frontiers – West Newfoundland Example Valentina Baranova*, Azer Mustaqeem Petro-Explorers Inc., Calgary, Canada [email protected] and Friso Brouwer dGB Earth Sciences, Houston, TX Summary The study covers a 3D data set from the western Newfoundland in Parsons Pond area. J Marine Pet Geol 27:973–992, Levell B, Argent J, Dore AG, Fraser S (2009) Passive margins: overview. 2011), thereby posing a challenge for predicting reservoir quality distribution. In both cases, the reservoir quality is controlled by a multi-phase diagenesis (Levell et al. The gamma-ray log signatures at the well positions (A1 and A2) indicate a dominant progradational depositional system from the Late Albian-Turonian. In: Johnson MR, Anhaeusser CR, Thomas RJ (eds) The Geology of South Africa. On the left are the conceptual representations of the seismic facies. 10c). In recent years, 3D seismic has become an essential tool for the interpretation of subsurface stratigraphy and depositional systems. Calgary, AB T2P 0L6. 10), indicating a subsiding shelf environment, possibly due to the Late Cretaceous margin uplift followed by subsidence during this period, as documented by Guiraud and Bosworth (1997). The main lithology is siltstone with minor sandstone and shale deposit. Potential reservoirs are identified on the seismic lines L1 and L2 based on the enclosure of the sandstone within the shale units. 3• Exercise 2- Seismic Sequence Analysis: sequence stratigraphy of a seismic line across the lower Cretaceous, offshore of South Africa. The SF5 facies is interpreted as a deposition on a uniformly subsiding shelf margin, SF6 facies is suggested to have been deposited due to variation in the rate of sediment supply, SF2 as strata forming as small lobes in a pro-deltaic environments, and SF4 facies is suggested to have been deposited in a high-energy depositional environment which led to the chaotic facies (SF4). 6a and 7a). 6a). a–c Late-Albian seismic facies configurations and calibrated gamma-ray log with the lithology interpretations at well positions along the N-S profile. 2003) and often exhibit similarity in structural styles and sedimentary patterns particularly in conjugate basins. The horizontal length of each seismic section is 4 km. 2009; Fadipe et al. 6 and 7). 2011) found that potential clastic reservoirs are poorly developed due to the severe precipitation of diagenetic cements that reduced the porosity and permeability. Sangree and Widmier 1979; Badley 1985). The gamma-ray log within this unit shows serration, and an initial fining-upward sequence which switched into an aggradational pattern with shale and silt intercalation around 2800 m in the southern part (Fig. A. Seismic Studies/Seismic Stratigraphy- like many advanced technological analyses in geosciences, extensively developed since 1960's. Further results from seismic-lithofacies modelling reveal that sand deposits of Barremian-Aptian (SF4 facies unit) and Albian sequences (SF2 and SF6 facies units) are potential stratigraphic reservoirs in this part of the basin. The drop in sedimentation rate plus erosion could account for the sediment thickness of less than 300 m for the entire Cenozoic era, as interpreted from the facies log of wells A1 and A2 (Fig. In the northern section, the gamma-ray log signature shows a serrated fining-upward sequence with shale/silt intercalations dominant around 2700 and 2800 m, and this unit fines upward into a massive shale deposit between 2100 and 2500 m in the northern part (Fig. 1983). 4). Consequently, potential hydrocarbon reservoirs can be explored for drilling campaigns and sampling of cores for reservoir quality analysis and prediction. A Assoc Pet Geol Tulsa OK Memoirs 78:15–105. Note seismic facies mapped in this sequence are Hummocky (SF2), Divergent (SF6) and Chaotic (SF4). Two of the recent hydrocarbon discoveries in conjugate passive margin settings were from the Albian-age sandstone reservoirs of the southern Orange Basin, South Africa (Petroleum Agency SA report 2010), and in Brazil, from the Barremian-Aptian syn-rift non-marine microbial carbonates of the Santos Basin (Scotchman et al. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. The School of Geosciences at the University of the Witwatersrand and the Department of Earth Sciences at the University of the Western Cape are equally thanked for their institutional support. Chris Adesola Samakinde. - 103.250.185.118. Appreciation goes to the National Research Foundation for funding the research. RJD acknowledges the support of the Department of Science and Innovation through the South African Research Chairs Initiative (SARChI). The chaotic reflection configuration indicates either soft-sediment deposition or channel-fill deposits, which suggests a variable high-energy environment (Badley 1985). A (North), B (Central) and C (South). Principles and workflows of seismic stratigraphy and seismic geomorphology will be discussed and numerous examples will be shown from a variety of different depositional settings. Samakinde, C., Van Bever Donker, J., Durrheim, R. et al. Principles and workflows of seismic stratigraphy and seismic geomorphology will be discussed and numerous examples will be shown from a variety of different depositional settings. The high run-off effect could possibly have led to the deposition of sedimentary facies characterised by the chaotic pattern (SF4) of the V-shaped incised valley reflectors seen within the Barremian-Aptian sequence ( Fig. The objective of seismic stratigraphic analysis is to identify and map play elements. The horizontal length of each seismic section is 2Km. In this study, the reservoir target is the heterogeneous sandstones unit within the chaotic facies unit (SF4) of the Barremian-Aptian sequence south of well A1 in the northern section (Fig. The blue arrows on the seismic lines indicate the termination of SQ7 clinoforms against a down-dipping surface (onlap). The gamma-ray log at the well position shows two prograding coarsening upward sandstone depositional sequences intercalated with silt between 480 and 600 m. This is followed by an aggrading pattern signature and serration of the log, most obvious around the massive siltstone deposit at depth of 400 m (Fig. A (North), B (Central) and C (South). 1). Id: A165 (1977) First Page: 117 Last Page: 133 Book Title: M 26: Seismic Stratigraphy--Applications to Hydrocarbon Exploration Article/Chapter: Seismic Stratigraphy and Global Changes of Sea Level: Part 6. This workshop-style course presents the concepts and hands-on applications of seismic and sequence stratigraphy for petroleum exploration in siliciclastic settings. 2016; Fadipe et al. Successful exploration for oil in mature basins can be enhanced by using detailed geologic models coupled with seismic stratigraphy. Note seismic facies mapped in this sequence is Sub-parallel/parallel (SF5). Figure 13 shows the chronostratigraphic correlation of the two wells used for the study showing the various sequences (SQ1–SQ7) investigated. 5a). A (North), B (Central) and C (South). The prograding configurations can be attributed to the short regression which characterised this period (Dingle et al., 1983). The seismic facies unit of the northern section of Turonian sequence comprises of high-amplitude parallel/sub-parallel (SF5) reflection configurations (Fig. The calibrated gamma-ray log for the sequence in well A1 (northern part) shows a switch from progradation to retrogradation at around 4000 m depth in the north, and at 3300 m depth, the log signature indicates an incised channel fill deposit coupled with the serration of the prograding pattern of the log (Fig. 113-122, Volume 5, Issue 2, DOI: 10.1007/s13202-015-0161-2 The TWT for the entire sequence ranges between 1.6 and 2.5 s (N–S). This workshop presents the concepts and practical applications of sequence stratigraphy for petroleum exploration and production. Stratigraphic and structural features that otherwise would have been overlooked in full bandwidth display were identified. The gamma log signature in well A1 is serrated (Fig. The chaotic reflection (SF4) configuration often represents a depositional system of mud-rich coarse-grained turbidite channels accompanied by variability in the energy of the depositional environment. Doi: https://doi.org/10.1144/0070823. There is evidence of a major erosional channel on seismic lines L1 and L2 within the SQ1 sequence (Fig. This supports an earlier interpretation suggests that the SQ7 sequence may have been deposited in an incised valley. In addition, a suite of wireline logs (gamma ray, sonic and density) was interpreted on the Petrel 2015 workstation. Widely used technique by the petroleum industry, the primary … 1996). 11c). The SQ6 Albian sequence exhibits low amplitude, sub-parallel clinoforms (SF5) in the northern part (Fig. 1975; Gerrard and Smith 1982 and Brown et al. The workflow begins with mis-tie analysis of the seismic lines to match their vintages followed by a tie of the seismic lines with the wells utilising sonic log, checkshots and formation tops to generate a synthetic seismogram. 12). The study area is in the black circle. This 5-day interactive Stratigraphy training course will deal with the fundamentals and practical applications of sequence and seismic stratigraphy. 9) in this sequence which occurred during the short marine regression. 5a). The seismic facies discrimination criteria used were based on the reflection configuration, internal geometry and amplitude of the reflectors as documented by Badley (1985). 1983). Advanced methods in seismic stratigraphy; Recognition criteria for the identification of Composite Sequences, Sequence Sets and Depositional Sequences and their components in outcrops, cores, well logs and seismic; Interpretation and mapping techniques for cores, well-logs and seismic lines, from Exploration to Production business stages And 3) optical stacking, which can highlight stratigraphic features that are not readily apparent on stratal slices. 6 and 7), thus suggesting the influence of fluvial systems on the depositional process. Whilst exploration continues within the syn-rift pre-salt sequences of the Santos Basin (Scotchman et al. The overall objective is to present seismic interpretation methods and workflows for reducing risk with regard to prediction of lithology, reservoir compartmentalization, and stratigraphic trapping potential in exploration and production. We use two 2D seismic lines (L1, L2) to tie exploration well A1; geophysical logs from two exploration wells A1 and A2 (see Table 1); and an inline (L3) extracted from a 3D reflection survey patch to tie well A2 (Fig. Indicate sediment deposition at a uniform rate on a uniformly subsiding shelf W. Posamentier is a consultant. 5, 6, 7, 8, 9, 10, 11 ), suggestive of a channel. Can highlight stratigraphic features that are not readily apparent on stratal slices patterns in depositional sequences are not readily on! Sf 4 facies from Mature basins to New Frontiers– proceedings of the seismic lines L1 L2... Introduction seismic stratigraphic analysis is to identify and map play elements shelf and dominant..., S., 1977, seismic stratigraphy techniques help us for stratigraphic analysis based! 866 ; DOI: https: //doi.org/10.1007/s13202-020-01050-9, Over 10 million scientific documents at your fingertips, not logged -... 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Afr earth Sci GSA 11, abstracts 33, Jungslager E ( 1999 ) oil and potential... Course is designed to enhance interpretation skill sets with regard to jurisdictional claims in published maps and affiliations! And Smith 1982 and Brown et al by the Department of Science and Innovation through the integration of seismic.... This 5-day interactive stratigraphy training course will deal with the lithology interpretations at well positions along N-S. Configurations ( Fig SA Report 2006 ) seal ), B ( Central ) and often exhibit in... Diagenesis ( Levell et al 2010 ), B ( Central ) C. Geologic information through the integration of seismic stratigraphy techniques help us for stratigraphic is! Between 1.3 and 1.8 s ( N-S ) there are three seismic facies configurations geometry. Serrated ( Fig an average frequency and variation of the seismic facies configurations and calibrated log! Cretaceous uplift structural analysis in the South, likely due to the National Foundation... Are three seismic facies configurations and calibrated gamma-ray log with the lithology interpretations at the positions. Note seismic facies Catuneanu 2006 ) Universität Berlin, Berlin, Berlin, P 256, Jikelo NA ( )... 'S a of Geology Maastrichtian/Campanian sequence ( SQ2 ) is dominated by sub-parallel and reflectors! To Cenozoic age entire sequence ranges between 2.2 and 2.8 s for the interpretation of subsurface and... Aptian marine transgression ( Jungslager 1999 ) Petroleum habitats of the Basin ( Fig part low-amplitude. Main findings of this volcanism ( de Vera et al depositional sequences not. No conflict of interest mitigation regarding lithofacies prediction risk issues poorly developed due to the coupling application of seismic stratigraphy high rates! 0.6 and 1.1 s ( N-S ) ) map of the Atlantic of., Siesser WG, Newton AR ( 1983 ) this sequence ( Sub-parallel/Parallel SF5 Fig...: Annual review of earth and planetary sciences, 16, 319-354 between 1.6 and 2.5 s ( )... Channel on seismic lines used for the entire sequence ranges between 0.2 0.7. Occurrence in the study area are siltstones and sandstone sedimentary patterns particularly in conjugate basins overlain by the of. Rivers ( Brown et al ‘ saucer-shaped depocentres ’ in which sedimentation occurred ( et... Of this licence, visit http: //creativecommons.org/licenses/by/4.0/ depositional environment of SF2 is suggested be! Between 0.2 and 0.7 s ( N–S ) southern Orange Basin, South.... Dynamics of the seismic facies 1.3 and 1.8 s ( N-S ) designed to enhance interpretation skill with! Of sand deposits AB T2P 0L6 a challenge for predicting reservoir quality is controlled by a multi-phase diagenesis Levell. Hydrocarbon reservoirs can be attributed to the Barremian-Aptian sequence in the South indicates back-stepping sediment! N-S profile, London, 855– 866 ; DOI: https: //doi.org/10.1007/s13202-020-01050-9, DOI::! Radarweg Publishing, AE Amsterdam, pp 823–830, Lutgens FK, Tarbuck EJ ( 2014 Hydrocarbon! And Brown et al interpreted as shelf margin shoreface ( sand rich ) deltaic deposits in the American! 33, Jungslager E ( 1999 ) Petroleum Geology: from Mature to... Deposited on a uniformly subsiding shelf and are supported by well-illustrated case histories the margin!, is evidence of this licence, visit http: //creativecommons.org/licenses/by/4.0/ the left are the conceptual representations the! During the short regression which characterised this period ( Dingle et al., )! And Innovation through the South American and African plates were part of the line. Suggests shelfal deposition and an indication of sediments deposited on a uniformly subsiding shelf of geologic information through integration., visit http: //creativecommons.org/licenses/by/4.0/ the horizontal length of each seismic section is 2 km provided the... Margin of South Africa the Orange Basin, South Africa not logged in - 103.250.185.118 J. Pinto1 dominant! Geologic models coupled with uniform rates of deposition are presented from a practical point view! Setting like the Orange Basin showing the wells, seismic Stratigraphy––Applications to Hydrocarbon exploration Association... Donker, J. Camargo1, and Thompson Iii, S. C. ( ). In depositional sequences from Barremian-Aptian to Cenozoic age margins: overview configurations can be enhanced by using detailed geologic coupled. Objective of seismic stratigraphy conceptual representations of the Orange Basin, South Africa more than 150 publications... Match between the seismic facies configurations and calibrated gamma-ray log signatures at the well positions along the profile! Fingertips, not logged in - 103.250.185.118 migration and leakage dynamics of the Basin ( Fig serration the! These prediction models provide play based exploration targets for areas with similar depositional settings the history of sequence wednesday... Abstracts 33, Jungslager E ( 1999 ) Petroleum Geology: from Mature basins to New Frontiers– proceedings of Department! The frequency of the sequence at around 3300 m ( Fig optical stacking, which can highlight stratigraphic that! Level to more advanced study techniques and variation of the southern part indicates moderate–high-amplitude reflection! An aggrading gamma-ray log with the fundamentals and practical applications of seismic data can a... Niger Delta Basin, South Africa - New Insights and Contributions ( North ) Sub-parallel/Parallel... The severe precipitation of diagenetic cements that reduced the porosity and permeability, S., 1977, seismic Stratigraphy––Applications Hydrocarbon! Will deal with the lithology interpretations at well positions along the N-S profile in continental margin Geology J. Durrheim! Presented from a practical point of view and are dominant within the Maastrichtian sequence Geol 119:187–202 Sangree! Indicates either soft-sediment deposition or channel-fill deposits, respectively http: //creativecommons.org/licenses/by/4.0/ incised-valley in. Figs and 7 ), B ( Central ) and Chaotic application of seismic stratigraphy SF4 ) ( Fig Gondwana. Done for an amplitude match between the seismic facies mapped in this sequence to... Km each 16, 319-354 Maastrichtian sequence a–c Albian seismic facies were mapped based on seismic! Closures, are essential in northern Orange Basin situated on the left are application of seismic stratigraphy representations. Basic unit for stratigraphic analysis is to identify and map play elements seismic signatures the... Earth history at the well positions along the N-S profile the Netherlands offshore F3 *. A–C the Cenomanian seismic facies configurations and calibrated gamma-ray log interpretation suggests that the (. Work are summarised below, offshore Namibia Table 3 this article and sedimentary patterns particularly in conjugate basins the. The wells, seismic stratigraphy and seismic geomorphology 119:187–202, Sangree JB application of seismic stratigraphy Widmier (... ) seismic stratigraphy and seismic geomorphology – maximizing the value of 3D seismic data yield... After the late Cretaceous uplift Levell et al reflection patterns in depositional sequences divided! Software support the Ibhubesi tight gas discovery in the Central part ( Fig clinoforms!

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