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EAGE International Conference on Petroleum Geology and Hydrocarbon Potential of Caspian and Black Sea Regions
- Conference date: 06 Oct 2008 - 08 Oct 2008
- Location: Baku, Azerbaijan
- ISBN: 978-90-73781-58-0
- Published: 06 October 2008
61 - 75 of 75 results
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The Black Sea – Evolution from Paleozoic Times to the Petroleum Century
By F. RosseletThe Black Sea Basin offshore sector is still immature in terms of exploration (less than 300 wells for 460,000 sq km). Less than 20 wells have been drilled in deep water areas, including wells of the DSDP project. The Black Sea is located in a complex tectonic area of the Tethyan domain, continuously involved in rifting and subduction processes since the Paleozoic. Paleotectonic models for the region are still subject to hot controversies but they are essential to better understand the hydrocarbons geology, especially in frontier areas with others prospective provinces (Moesian Platform, Rioni, Indol-Kuban, Pontides etc). Despite the lack of available data in this underexplored region, the Black Sea is now seeing renewed interests from international companies, since the petroleum legislation became more attractive for foreigner investors. Recent discoveries testify also the diversity of new play concepts for conventional and unconventional hydrocarbons resources.
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Some Features of Caspian – Kuba Region Geodynamics
Authors A.Y. Shahmurad, S.S. Gadjiyev and S.S. GadjiyevEvalution of Creaceous, Paleogene Low Neogenic oil and gas bearning deposits perspectives within Caspian - Kuba oil and gas bearning region is given on the basis of paleotectonic analysis that is one of the main criteria for oil and gas content definition.
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Petrographical and Geochemical Evidences for Magma Mixing in the Volcanic Rocks in the Sahand Volcano
By F. AliNowadays there are numerous evidences that indicate some magmas with intermediate composition have derived from contamination and mixing of magmas that have different composition. Petrographic studies on some tuffs and volcanic rocks in the Sahand area have indicated evidences for magma mixing phenomenon. This evidences are included: peresence of two (or three) type glass with different chemical composition, existence of basic micropillows in acidic matrix, existence of sieve texture in plagioclase phenocryst, corrosion and resorption of crystals, existence of zonation specially in plagioclase phenocryst and existence of quartz xenocrysts with pyroxene reaction rim. Also it is necessary to mention, although according to major and trace elements variation diagrams, the fractionation crystallization has been effective for evalution of alkali olivine basalt magma, but magma mixing process and contamination of magma with crustal materials have been also responsible for forming of rocks, specially, rocks with intermediate to acidic composition and made some anomalies in variation diagrams. Key words: Sahand, Plagioclase, Micropillow, Xenocryst.
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Formation of Oil and Gas Pools in Mesozoic Deposits in the Central Part of Southeast Subsidence of the Greater Caucasus
More LessMiddle Jurassic deposits within the limits of synclinal depressions of southeast part of Khizi tectonic zone have plunged into MOPH at the beginning of Valanginian stage, and were there up to the end of the Cretaceous period. From the beginning Paleogene up to present time they were in MGPH, where was generation only gaseous HC. In the most subsidence parts of a syncline zones in MOPH was a lower part lower Cretaceous deposits. Oil and gas pools of Mesozoic deposits were formed due to migration HC both in lateral, and in vertical directions. Optimum conditions for formation and preservations of these pools exist within the limits of near arch parts NE and under thrust parts of SW wings of folds in the SE parts Khizi tectonic zone.
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Thermal Maturities Based on Stable Carbon Isotope Composition Gases
More LessA comparison of calculated thermal maturity values based on the stable carbon isotope compositions with generalized modeled results obtained on several of the fields suggests that the gases have not formed in situ, but have vertically migrated.
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3D Facies Modeling of the Delta of the Holocene Volga River as an Analogue of South Caspian Pliocene Productive Series
The comprehensive data set has been collected during field campaign in the modern Volga delta. These data provide by a valuable information for the understanding of the reservoir heterogeneity of the Pliocene analogue of these sediments (Productive Series) as well as understanding of the influence of the sea-level change on the environmental shifts and stratal architecture.
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Lithphysical Description of the Rocks in the Gyuneshli Area Section
More LessThe mineralogy of these sandstones and siltstones is most commonly represented by feldspars, quartz, muscovite, sericite, biotite, epidote, zoisite, pyroxenes (augite and diopside), amphiboles, chlorite, calcite, dolomite, aragonite, celestine, anhydrite, barite, magnetite, pyrite, limonite, phosphates, sphene, zircon, garnet, tourmaline, rutile and anatase. Clay minerals include illite, montmorillonite, kaolinite and mixed-layer minerals, together with palygorskite and sepiolite.
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Paleogeography and Types of Pliocene Basins within South Caspian Trough
Authors C. Khalifa-Zade, V. Mursalov, R.A. Huseynov, V. Mursalov and R.A. HuseynovOn the paper is considered new versions on the paleogeographic envoiroment and types of pliocene basins within South Caspian trough. Authors in the base of complex sedimentology investigations with using some data seismic exploration and seismostratigraphic reconstruction are considered paleogeographic envoiroment of Pliocene deposits and determinated two types Pliocene baisins - early Pliocene closed graben-trench type and late Pliocene - open epicontinental type basin.
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Depositional Cycles and Sr/Ba Ratio in Baku Regiostage Succession in the Western Flank of the South Caspian Depression
By E.F. AmirovFor the first time very detailed study (centimeter scale) of outcrop was carried out for stratigraphy and environment of the Lower Pleistocene deposits cropped out in the Western flank of the South Caspian depression (Shikhovo exposure). The data obtained demonstrated the high-frequency cyclicity in sedimentation accompanied by rapid lateral and vertical depositional environment change. Most of these system tracts have not yet been studied in detail. The depositional setting during accumulation of this succession has changed within shore face-shelf environment. On the background of these cycles, the depositional series of a higher order containing sediments deposited during very small-scale sea level fall and rise occur. Some information contained in this document is the new data, due to more recent observations and interpretations.
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Facies Analysis of Triassic Formations of Hassi R’Mel in Southern Algeria by Using Well Logs - Recognition of Paleosoils
Authors R. Baouche, A. Nedjari, R. Chaouchi, S. Eladj, A. Nedjari, R. Chaouchi and S. EladjThe Saharan Triassic Province was the subject of many works dealing with geophysics and geology; they have always been insufficient compared to the surface of the Province. This work was not always exploited in an optimal and rigorous way. In fact, they are only related to levels representing an oil interest, with the detriment of the remainder which is also significant and one thus notices great insufficiencies in structural and stratigraphic analyses. The application of the results obtained during the faciologic analysis, starting from the data of the logs available at the level of the formations of Triassic of Hassi R' Mel made it possible, first, to define ten electro facies (Sandstone, argillaceous, Dolomite and evaporates as well as the presence of dolerite and clays), on the level of the wells of the zone of study.In one second stage, after development of a model , and to have checked it on other surveys, a semi-automatic processing data was carried out on 7 other drillings (Hr-81, Hr-78, Hr-52, Hr-55, Hr-23 and Hr-30).
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Analysis and Interpretation of Environment Sequence Models in the Triassic Province of Algeria
By R. BaoucheThe Saharan Triassic consisted of varied continental environments, namely, fluvial, flood plain, lake, Sebkha, and wind. In such a context, and during the periods of no deposition, physicochemical phenomena related to the climate and type of bedrock occur, leading to the formation of a more or less advanced ground related to the elapsed time between two phases of sedimentation. In the Saharan Triassic the context is different; however, one nevertheless finds the same expressions along with additional ones: silcrête, gypscrête, and calcrête. The formation models recognized on the level of the wells at Hassi R'Mel field are representative primarily of formations filled with siliciclastic, eruptive sediments and evaporate-type saliferous shale deposits. The top of the stratigraphic sequences is represented by discontinuities, modifications related to the pedogenesis and not characterized in the old models. This work therefore attempts to refine the above models by using a diagraph-based modeling approach (Gamma ray, neutron, sonic, density and resistivity) to examine the evolution of sequences. Lithography findings obtained using the results of faciologic analysis established for this purpose on the level of the Hassi R'Mel field are also used.
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Magnetic and Radioactive Profiling through a Fossil Mud Volcano in the Visinity of the Dead Sea Rift, Israel
More LessThe Hatrurim Formation or Mottled Zone that crops out in Israel and Jordan was recently recognized as a complex of fossil onshore mud volcanoes. Geophysical prospecting was performed along several levels of road cuts through Nabi Musa mud volcano edifice. The obtained magnetic pattern of mud volcano edifice may be used as an example of the interpretation of magnetic field over onshore mud volcanoes that are characterized by spontaneous ignition of hydrocarbon gases.
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The Estimation of Heterogeneous Reservoir Productivity Based on Well Log Data
By H. ShakarovOne of key parameters measured for productivity estimation at well cross-sections is the electrical resistance of rocks. This parameter varies within a wide range. One of the factors influencing on a value of electrical resistance is the mineralization of formation water which saturated rock. According to borehole observations of terrigenous rocks by geophysical logging data in the areas located at the Lower Kura and Absheron hydrocarbon-bearing regions, allows delineation of reservoirs characterized with different values of electrical resistance. Stated above factors are complicated well logging data. Processing, detection and productivity estimation of heterogeneous sand and clay reservoirs require special handling at such problem. Accounting of stratified shaliness is one of handling in such problem solving. Processing of laterologging data shows that the sounding curves against water-bearing reservoirs have a form of three-layer curve with higher penetration. Existence of the deep penetration at separated thin-bedding reservoir is possible to find by the comparison of maximum values of equivalent resistivity measured with sondes of various size. If the results are similar for all kind of sondes, then obvious that the increasing of apparent resistivity is caused by influence of anisotropy effects.
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Taman Peninsula Research with Use of Gravitational Field Anomalies
By A.A. ChernovThe study of a Taman peninsula geological structure is carried out on the basis of use of set of the geophysical data, that raises completenes and unambiguity of the decision. First of all, this increase of reliability of allocation of geophysical anomalies on a background of handicapes and more authentic estimation of a geological nature of the allocated anomalies. The basis of a geophysical complex on petroleum and gas prospect is a complex of a seismic with gravity. Described research were carried out on the basis of the analysis and new interpretation given precision gravitational observed data of scale 1:25 000, seismic 2D and 3D and drilling. As a result of the carried out works on the basis of the gravity are predicted perspective concerning detection of a HC zone. The connection of gravitational maxima with tops of high Cretaceous raisings is confirmed. On the basis of a complex of the data are constructed the predict scheme in scale 1:25 000.
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Hydrocarbon Exploration Activities and Play-Prospects of the Turkish Black Sea
Authors A. Demirer, V. Aydemir and C.T. MenlikliThe Black sea has an area of 436,400 km2 and most of this area is deep water with a maximum depth 2,200 m. 2/5th of this area is located within economic zone of Turkey so called Turkish Black Sea. Even though, the shelfal part of the Black Sea has been lightly explored; the deep water part of it is a frontier basin and has been barely scratched. The majority of the Turkish offshore Black Sea lies within ultra deep-water realm. Exploration efforts began in the early 1990’s by means of reconnaissance hydrocarbon exploration and flourished after 2002. These hydrocarbon exploration activities mainly consist of good quality exploration seismic (2D and 3D), gravity-magnetic, long offset seismic, onshore geological fieldwork. In total more than 70.000 km 2D, 11.000 km2 3D seismic have been acquired and 3 deep water wells two of them at the westernmost part one of them easternmost part have been drilled since 1999 (Figure-1). Most of these activities have been held by Turkish Petroleum Corporation, TPAO.
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