This paper proposes a new reservoir characterization scheme. Outcrop characterization, 3d geological modeling, and. Pdf combining rock physics and sedimentology for seismic. Quantitative approach to reservoir characterisation of thinbedded turbidites. Haughton, peter, chris davis, and william mccaffrey, 2006, facies prediction in turbidite fan systems nature and significance of linked debrites in sandrich versus mixed sandmud systems recent advances in siliciclastic facies models. The key parameters for this reservoir include an oil viscosity of 100 cp, porosity of 15%, and thickness of 12. It contains a well log study, rock physics modeling, a forward simulation for generating seismic responses, and objectbased prior modeling. To obtain the complete report, contact the west virginia geological survey at 304 5942331. Pdf the architecture and quality of lacustrine turbidites that act as petroleum reservoirs are less well. Seismic reservoir characterization reservoir software. Characterization of turbidites from the urucutuca formation of the. Purchase reservoir characterization ii 1st edition.
Oil and gas professionals gather different sets of data to give your team a complete picture of a reservoirs capacities and hazards. This description has been simplified in order to emphasize the original techniques involved. Reprinted with permission of the gulf coast section sepm foundation. The maps resulting from the seismic reservoir characterization were then used as a guide for gde maps construction. Department of geology, university of nigeria, nsukka, enugu state, nigeria. Turbidite reservoir characterization at marlim field, campos basin, brazil. Naturally fractured reservoir characterization seeks to confront many of these challenges by providing an introduction to the engineering and geological character of naturally fractured reservoirs. Fifty seismic lines and petrophysical logs from 15 wells were used to characterize the reservoirs of the urucutuca formation palaeocanyon in the almada basin. This type of model, created as a result of reservoir characterization,is important in four ways. Petrographic characterization to build an accurate rock. Carbonate naturally fractured reservoir is a multiporous system that contain microfractures, fractures, vugs, macrovugs, matrix, type of fractures network. Pdf reservoir characterisation of deepwater massive. The use of forward modeling as an aid to reservoir characterization and modeling of deepmarine sedimentary systems. The log analyses indicate great variations in effective porosity reaching a maximum value.
The principal data of this study is a highquality 3d pstm from the block f3, located in the north sea offshore of netherlands figure 3, left. Impact of turbidity current in the formation of turbidites characterization of turbidites using the idealized bouma sequence economic importance of turbidites 5. The characterization of a petroleum reservoir is based on geological and petrophysical description of it, i. Here we have seismic impedance sections, both in time and depth, for some of the reservoirs from the barracuda field. Diagenesis and reservoirquality evolution of deepwater turbidites. Reservoir facies characterization of turbidite deposits. The university of texas at austin, austin, texas abstract turbiditic oil reservoirs in the deep of gulf of mexico are the likely major source of new petroleum reserves in the united states. Based on detailed examination of turbidite channel analogs as revealed in 3d seismic data. Petroleum geology and reservoir characterization of the. Introduction low permeable and tight sandstone reservoir exhibits porosity and permeability which are subsequent results of depositional and complex diagenetic processes golab et al. However, some of the very best reservoirs have been deposited from turbidity currents in. The fans primarily form stratigraphic traps with an element of fault seal on the west flank. In characterization of deepmarine clastic systems, hartley aj, prosser. Our solutions are categorized into the four techniques described in the tabs below.
Petrophysical characterization of carbonate naturally. Enhanced reservoir characterization in a deep water turbidite system using borehole images and spectroscopy logs. Hohn, editor west virginia geological and economic survey publication b45 this is a summary. Clastic reservoir characterization and sequence stratigraphy. Reservoir facies characterization of turbidite deposits with. Because they must be incorporate into the numerical model of simulation the results of the petrophysical characterization, it is conceptualized like a model of double porosity. Overview of deepwater reservoir elements 5150 mitchum et al. The reservoir architecture of turbidite channels search and. Select the inversion methods for your particular analysis, based on project workflow, budget, and scope of work. Carboniferous ross sandstone formation namurian, county clare, western. These fans are dominated by mass flow and highdensity turbidite sands, with subordinate lowdensity turbidites set within lacustrine shales. The reservoir characterization of the sea lion field.
An integrated multidisciplinary geostatistical reservoir characterization is conducted in two main steps. The depth conversion workflow is an integral part of our reservoir characterization workflow. Both supervised and unsupervised seismic facies maps have been generated at the l sand level on marathon and veritas figures 15 and 16, using the same techniques as for the h sand. Static reservoir modeling using well log and 3d seismic data. Reservoir characteristic an overview sciencedirect topics. Pdf turbidite reservoir characterization at marlim field. Although assumed pay sand thickness is the same, the characteristics set forth in table 373 differ from those previously discussed in that 1 assumed depth is greater, 2 assumed natural gas pressure.
A turbidite is the geologic deposit of a turbidity current, which is a type of sediment gravity flow responsible for distributing vast amounts of clastic sediment into the deep ocean. The resulting 3d geological model allowed the urucutuca formation and its turbidite canyons to be evaluated as potential petroleum reservoirs. Geophysical characterization is a key process in todays oil and gas industry to perform prospect evaluation, geological modeling and reservoir characterization. Figure 8a displays the seismic interpretation with the white line illustrating the stratigraphy within the bossier. Pdf the deepwater turbidite play is currently one of the most prolific and important in hydrocarbon exploration and production. Mathematical models, scaling analysis and simulation bonnecaze, roger t. These results suggest integrating electrical image logs with conventional data may significantly enhance recognition and characterization of subreservoir scale strata in wells without core data, and aid in the identification and analysis of thinly bedded turbidite and mtd reservoirs. The scaglia formation consists of pelagic biomicritic limestone containing calcareous turbidite bodies which constitute the reservoir in several offshore oil and.
Sandstones provide the best known conventional reservoirs although more and more unconventional tight reservoirs including low porosity and permeability sandstones, siltstones and shales are being exploited for oil and gas production. Location map of the veritas and marathon 3d cubes with the available wells. The result of reservoir characterization is the creation of the sharedearth model. Static reservoir modeling using well log and 3d seismic.
Turbidites characterization from seismic stratigraphy. This process has become of utmost importance since the era of easy oil has ended. Reservoir characterization models are used to simulate the behavior of the fluids within the reservoir under different sets of circumstances and to find the optimal production techniques that will maximize the production. Bell canyon formation, deepwater sandstones, delaware basin, reservoir characterization, turbidites contents. The principal goals were to assess pore level controls on reservoir quality and wireline log. Sedimentary characteristics of turbidite fan and its implication for. The two cubes overlap in the region of annapolisg24 and crimsonf81 wells. It is especially relevant for lithologyfluid prediction. Klein and chaivres 2002 interpretation of the bossier formation. Using a four component 4c oceanbottomcable obc seismic survey i set out to improve the reservoir characterization in a deepwater turbidite eld in the campos basin. Increase your proven reserves, discover bypassed pay, reduce development time and costs, improve production rates, and rejuvenate old fields through the skills learned in this course. Diagenesis, turbidites, reservoir quality, passive and active margins, basin setting, depositional facies, sequence stratigraphy. Chapter 10 deepwater deposits and reservoirs sciencedirect. These fans are dominated by mass flow and highdensity turbidite sands, with subordinate lowdensity turbidites set within lacustrine.
This course provides a unique opportunity to examine modern, ancient, and subsurface examples of data from turbidite reservoirs. The result of reservoir characterization is the creation of the 3d sharedearth model. Enhanced reservoir characterization in a deep water turbidite. Clastic hydrocarbon reservoirs hold more than 40% of world oil and 60% of world gas reserves. May, 2015 reservoir characterization integrates all available data to define geometry, distribution and flow properties of a petroleum reservoir slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Reservoir characterization is the study of reservoir properties using geologic, geophysical, petrophysical, and engineering disciplines, including uncertainty anal. Jul 21, 2016 22 april 2016 aims and objectives the aim is to understand how turbidites develop and why these deposits are important the objectives include studying. Implications from petrophysical data of the paradisefield, niger delta, nigeria. Pdf architecture and reservoir quality of lowpermeable eocene. Special publication of the european association of petroleum geoscientists, vol 3. Site characterization characterize the subsurface at a location with the potential to inject at least 30,000,000 tons of co 2 reservoir potentials were inferred from petroleum industry data and field data from the sequestration program. Reservoir characterization of the s sand auger field. The wells of the paradisefield penetrated the coastal swamp ii and the shallow western offshore.
The exploration and discovery history of the guyana ghana. Seismic reservoir characterization central scotian slope study canada june 2016 pl. Because they must be incorporate into the numerical model of simulation the results of the petrophysical characterization, it is conceptualized like a. This would be typical of a reservoir for which primary recovery would be uneconomic. This classification was largely based on seismic stratigraphic appearance, and stratigraphic position within a depositional sequence. However, these sedimentary environments are often characterized by very complex sand distributions. Deep water turbidites more liquid systems clastic sandstone reservoirs basin floor fan systems like jubilee, ghana and shell perdido, gom possible watersupport, lower rock properties with higher rock volume channelized systems like gom tahoe, and ten field complex in ghana. This study presents reservoir characterization of middle and upper jurassic sandstones by using petrophysical analysis, compaction study and rock physics diagnostics with data from 26 exploration wells from the johan sverdrup field, central north sea.
Geological setting of the study area the study area is located in an oil field in the niger delta, in a lease with a sea bed topography that ranges from 14001800 m. The petroleum industry is increasing its focus on the exploration of reservoirs in turbidite systems. Abstract it is commonly accepted that deep marine reservoirs are dominated by submarine channels and channelized lobes. Upper leonardian lower permian upper bone spring limestone, delaware basin, southeast new mexico and west texas. The main steps of a study consist in successively building. However, quantifying these heterogeneities and predicting their distribution is far from. Geosoftwares comprehensive portfolio covers the entire seismic reservoir characterization workflow. Combining rock physics and sedimentology for seismic reservoir characterization of north sea turbidite systems article pdf available january 2000 with 3,482 reads how we measure reads. Implications for reservoir characterization ii sepm, aapg annual convention, april 912, 2006.
Reservoir characterization refers to a model of a reservoir that integrates important information related to the production and storage of hydrocarbons. Petroleum geology and reservoir characterization of the upper devonian gordon sandstone, jacksonburgstringtown oil field, northwestern west virginia michael e. Quantitative approach to reservoir characterisation of. Characterization of deepwater carbonate turbidites and masstransport deposits utilizing highresolution electrical borehole image logs. Different types of turbidite reservoirs have different physical property, so there are differences in hydrocarbon exploration potential. Overview of deepwaterreservoir elements 5150 mitchum et al. Submarine channels can be broadly classified as gravityflow channels and leveed channel complexes. Petrographic characterization to build an accurate rock model.
Abstract this paper proposes a new reservoir characterization scheme that integrates geological facies from borehole resistivity image logs, mud logs, and nuclearmagneticresonance nmr logs for reservoir quality assessment. The other reservoir, referred to as the heavy reservoir exhibits oil viscosity of 4000 cp, porosity of 35%, and thickness of 30. A model of a reservoir that incorporates all the characteristics of the reservoir that are pertinent to its ability to store hydrocarbons and also to produce them. Reservoir characterization this paper gives an overview of the activities in geostatistics for the petroleum industry in the domain of reservoir characterization. Basic elements of a reservoir characterization study petrowiki. Subsurface reservoir characterization typically incorporates well data augmented with seismic data to establish the geological model of the reservoir 8. The process of iteration of data types, including analog data that was collected expressly to solve subsurface issues, will be offered to validate subsurface interpretations. As parsons et al 2003 observe, gravitydriven motions produced from turbulent suspensions are an. Petroleum geology and reservoir characterization of the upper.
First, a largescale reservoir framework of multiple sequence and subsequence surfaces is constructed based on the integration of data sources of geologic well markers, petrophysics, and seismic horizons. The primary objective is to produce a velocity model with a stable and geologically plausible background trend. Reservoir characterization of the s sand auger field, garden banks 426, 427, 470, and 471, turbidites and associated deepwater facies, robert d. Integrated geostatistical reservoir characterization of.
Outcrop characterization, 3d geological modeling, and upscaling for reservoir simulation of jackfork group turbidites in the hollywood quarry, arkansas, usa, atlas of deepwater outcrops, tor h. Geologic setting stratigraphic framework delaware sandstone oil play outcrop characterization of bell canyon sandstone reservoir analogs. Turbidites are sediments which are transported and deposited by density flow, not by tractional or frictional flow the distinction is that, in a normal river or stream bed, particles of rock are carried along by frictional drag of water on the particle known as tractional flow. Developing and managing turbidite reservoirs petroleum geoscience. The modern team approach to reservoir characterization describes productive zones more reliably through the integration of disciplines, technology, and data. The extensive use of 3d seismic as a reservoir characterization tool has optimized well location and allowed the reduction of geological risks.
Pdf the use of forward modeling as an aid to reservoir. In fields producing from turbidite reservoirs, the impact of sedimentary heterogeneities on fluid flow cannot be overemphasised. Reservoir characterization to derive properties pgs. Turbidite reservoirs are often deposited from mixed sandmud flows, and comprise a bottom sandrich part and a mud layer at the top. Reservoir characterization of jurassic sandstones of the. Enhanced reservoir characterization in a deep water. The field consists of five productive horizons with the lowermost s sand reservoir containing an estimated 120 mmboe, which is over half of the total field reserves. The primary objective is to produce a velocity model with a stable and geologically plausible background trend which will enable accurate depth conversion over the study area. In order to achieve my goal, prestack angle gathers were derived and pp and ps inversion were performed. Emam and others published innovative nonconductive mud borehole imaging technology improves turbidite reservoir characterization. It is a central part of the reservoircharacterization teams work. The advanced seismic techniques developed by ifpen have proved remarkably accurate in predicting reservoir occurrence and.
The reservoirs that form the sea lion field comprise a series of canyonfed fans deposited into a deep, anoxic lake, on the hanging wall of the basin boundary fault. Turbidites are more likely to result in mudbased layer cakes rather that perfect reservoirs. Reservoir characterization training course petroskills rc. Shingled turbidites tend to be muddier and more poorly sorted than true sheets because they are associated with more muddy parts of the system. Facies and reservoir characterization of cretaceouseocene. It contains a well log study, rock physics modeling, a forward simulation for generating seismic responses, and. Deepwater turbidite depositional systems and reservoirs. The water must be travelling at a certain velocity in order to suspend the particle in the water and push it along.
Basic elements of a reservoir characterization study. A good characterization of reservoir heterogeneities is a fundamental requirement for a. Seismic reservoir characterization plays an essential role in integrated exploration and reservoir studies, as it provides our clients with an optimal understanding of the reservoirs internal architecture and properties. Four lithofacies were identified in the turbidite deposit environment based on.
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