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Journal de la Recherche Scientifique de l’Université de Lomé
Exploration plays consist of stratigraphic and stratigraphic-structural combination traps, with reservoirs in aeolian, shoreline, tidal channel, and shallow marine sandstones, coquinas, and tidal flat and marine shelf carbonates. To know the petrophysical characteristics associated with sedimentary facies gammay ray logs providing information on the natural radioactivity of sedimentary rocks and the sonic logs which document on facies and petrophysical variations rocks sevimentaire studied.
The stratigraphy of the Offshore Benin Basin was established later and considering lithological and paleontological similarities with formations of various southern Nigeria basins, the stratigraphic chart adopted for this basin was a mixed variant of various Southern Nigerian basins nomenclatures. Generally the velocity is still low in impermeable and little porous clay.
Catégorie:Bassin sédimentaire — Wikipédia
H – Cement geochemistry of photozoan carbonate strata upper carboniferous-lower PermianFinmark carbonate platformBarents Sea. This is a preview of a remote PDF: Based mainly on available lithological, biostratigraphic and paleoenvironmental data, this paper summarizes the stratigraphic succession of theses basins and attempts a comparison of these stratigraphic nomenclatures.
The thickest deposits, and most of the oil and gas, occur in the westward thickening and deepening depocentre called the Peace River Embayment. Selon Pothin et al.
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For the first time, a correlation of stratigraphic charts of each basins and a schematic cross section showing their lithostratigraphic units, especially the Cretaceous-Paleocene interval which is petroliferous, sedimfntaire proposed. Schlumberger – Log interpretation. Schlumberger Educational Service, Houston Texas: In marls, relatively high propagation velocity implies that they are less penetrable as clays because of the presence of fluid.
Le sommet est essentiellement argileux. If you do not see its contents the file may be temporarily unavailable at the journal website or you do not have a PDF plug-in installed and enabled in your browser.
Three of these plays are predicted to contain over one half of the remaining gas potential: The Benin and Western Nigeria Offshore Basins, which are parts of an extensive basin called the Dahomey Benin Embayment, were formed during the Early Cretaceous under similar tectonic conditions and continental sedimentary environments. It reveals that two deposits phases occurred during the carbonate sedimentation. This radioactivity recorded in clays would be linked to the low organic matter content and leaching reworked elements.
Alternatively, you sedimfntaire download the file locally and open with any standalone PDF reader: Through the gamma ray logs, it appears that the clay phases have low radioactivity, which often progress to average values.
Natural gas resource potential of Triassic strata in the Western Canada Sedimentary Basin excluding the Foothills Belt was evaluated using a combination of geological play analysis and statistical estimation. Les valeurs dans les argiles sont moyennes 60 API. Calcareous layers generally have a shorter time of wave propagation, suggesting that they are indurated, recrystallized and homogeneous.
There are more or less dolomitised layers alternating with more homogeneous chemical limestone benches, biogenic limestone debris of organisms and past clay. Benin and Western Nigeria Offshore Basins: The sonic log fluctuations in the limestone stage reflect the heterogeneity of deposits.
This publication supercedes Geological Survey of Canada; International Journal of GeosciencesVol. The limestone is fractured, so more porous than clay and marl. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Les couches argileuses ont une vitesse sonique faible.
Triassic strata belong to a platformal succession of mixed siliciclastic, carbonate, and evaporite sediments deposited along the western sedi,entaire of the basin.
These include the 10 mature plays, 2 immature plays the Montney Subcrop North-Ring play and the Montney Distal Shelf-Glacier play with undiscovered gas in-place totalling 28 x m3, and 1 conceptual play with 5 x m3 gas in-place.
Catégorie:Bassin sédimentaire – Wikiwand
Bassij sonic log has two phases in the marl and limestone interval. Statistical analysis of the mature plays indicates that a total of 13 plays are likely to exist. Analyse lithostratigraphique et comparaison avec le log gamma ray Chadelle, This publication contains the following publications.
Triassic strata continue to offer attractive exploration targets, as shown by recent activity at Valhalla, Spirit River and Grande Prairie. Contribution de Sonatrach, Division Exploration: A PDF file should load here. In marl phases radioactivity is medium to high indicating a high content of uranium, thorium and potassium deriving from clay minerals.
The bulk of data shows that sedimentation begins with terrestrial at the base, passes through shallow marine, deep marine with restrictive bottom circulation and ends with open deep marine conditions. Moreover, a High Resolution Biostratigraphy summary including micropaleontology, nannopaleontology and palynology distributions relating to each offshore basin is needed for sequences correlations and entire harmonization of the stratigraphic nomenclature of these offshore basins.
Received 18 th June, ; Received in revised form 19 th July, ; Accepted 24 th August, ; Published online 30 th September, Scanning electron microscopy allowed to highlight the depositional environment of the stone-line. Dans la phase marneuse, la vitesse de propagation des ondes acoustiques est quasiment constante, mais dans les phases calcaires les vitesses sont fluctuantes.
This publication is a translation of Geological Survey of Sesimentaire The Triassic succession contains a total discovered in-place volume of x m3 raw gas reserves in 10 mature and 2 immature plays.
Glover P – Exploitation de gaz de shale dans les basses terres sedimenttaire Saint-Laurent: Strong radioactivity values in some limestone layers are related to their homogeneity and the present of organic matter.