Sequence Stratigraphic Analysis of the Middle Paleocene-Middle Eocene in the Sulaimani District (Kurdistan Region), North Iraq

2019 ◽  
pp. 207-209
Author(s):  
Fadhil Ameen ◽  
Fawzi Mardan
Keyword(s):  
Middle Eocene ◽  
Kurdistan Region ◽  
Sequence Stratigraphic ◽  
Stratigraphic Analysis ◽  
North Iraq

scholarly journals Palynological Zonations and Sequence Stratigraphic Analysis of Sediments in Benin West-1, Anambra Basin, Nigeria

2016 ◽  
Vol 8 (2) ◽  
pp. 171-179
Author(s):  
O. Odedede ◽  
J. E. Ogala ◽  
F. C. Ugbe
Keyword(s):  
Cluster Analysis ◽  
Middle Eocene ◽  
Botryococcus Braunii ◽  
Good Source ◽  
Sequence Stratigraphic ◽  
Stratigraphic Analysis ◽  
Anambra Basin ◽  
Condensed Section ◽  
And Cluster Analysis ◽  
System Tract

Palynoflora analyses from Benin west -1, Anambra Basin has unfold three palynozones based on abundance, composition of palynoflora and cluster analysis. Palynozone-1 has been dated as Late Maastrichtian age and belong to the lowermost Imo Shale, palynozone-2; Middle Eocene and palynozone -3  is  dated Lutetian to Bartonian age. Sediments between   depth intervals of 2649-2560 m is marked a sequence boundary, 1650-2560 m, and 970-1190 m is delineated as high stand system tract. Shaly intervals from the depth of 1644 m, and 1234 m recorded  acme of palynoflora (Zonocostites ramonae, Monoporites annulatus, Verrucatosporites spinosus, Botryococcus braunii) and probably fingerprints a condensed section. The condensed section intervals (1644 m and 1234 m) may depict   good source rock and exploration targets.

scholarly journals Microfacies and sequence stratigraphy of the Late Campanian Bekhme Formation in the Dohuk area, north Iraq

GeoArabia ◽  
2008 ◽  
Vol 13 (1) ◽  
pp. 39-54 ◽  
Author(s):  
Majid M. Al-Mutwali ◽  
Nabil Y. Al-Banna ◽  
Jamal S. Al-Ghrear
Keyword(s):  
Upper Cretaceous ◽  
Planktonic Foraminifera ◽  
Third Order ◽  
Sequence Stratigraphic ◽  
Stratigraphic Analysis ◽  
North Iraq ◽  
Area North ◽  
Order Sequence ◽  
The City ◽  
Upper Campanian

ABSTRACT The Bekhme Formation represents the lower part of a regional Upper Cretaceous (Campanian - Maastrichtian) succession that was deposited over most of Iraq and adjacent regions. The formation unconformably overlies the Qamchuqa Limestone Formation (Hauterivian-Albian) and is overlain by the Shiranish Formation (Upper Campanian - Maastrichtian). Northeast of the city of Dohuk, an incomplete, but well-exposed, section of the Bekhme Formation crops out in a 75-m-thick section that formed the basis for our study. Twenty-five samples were collected from the section and used for biostratigraphic and microfacies analysis. The study of planktonic foraminifera resulted in the recognition of two Campanian biozones: the Globotruncanita calcarata Zone and the Globotruncanita stuartiformis–Globotruncanita stuarti Zone, both considered to be of Late Campanian age. Three main microfacies were distinguished throughout the formation, which represent middle-shelf, outer-shelf and upper-bathyal environments. Sequence stratigraphic analysis, as calibrated by microfacies, delineated five depositional sequences of probable fourth-order, thus suggesting the studies section was deposited in about 2.0 million years and represents an overall third-order sequence.

Application of Seismic Sequence Stratigraphy for Delineating Mishrif Prospects in Western Onshore, Abu Dhabi, UAE

2021 ◽  
Author(s):  
Subrata Chakraborty ◽  
Monica Maria Mihai ◽  
Nacera Maache ◽  
Gabriela Salomia ◽  
Abdulla Al Blooshi ◽  
...  
Keyword(s):  
Abu Dhabi ◽  
Seismic Sequence ◽  
Large Area ◽  
Oil Accumulation ◽  
Sequence Stratigraphic ◽  
Stratigraphic Analysis ◽  
Seismic Sequence Stratigraphy ◽  
Well Data ◽  
Seismic Reflectors ◽  
Sweet Spots

Abstract In Abu Dhabi, the Mishrif Formation is developed in the eastern and western parts conformably above the Shilaif Formation and forms several commercial discoveries. The present study was carried out to understand the development of the Mishrif Formation over a large area in western onshore Abu Dhabi and to identify possible Mishrif sweet spots as future drilling locations. To achieve this objective, seismic mapping of various reflectors below, above, and within the Mishrif Formation was attempted. From drilled wells all the available wireline data and cores were studied. Detailed seismic sequence stratigraphic analysis was carried out to understand the evolution of the Mishrif Formation and places where the good porosity-permeability development and oil accumulation might have happened. The seismic characters of the Mishrif Formation in dry and successful wells were studied and were calibrated with well data. The Mishrif Formation was deposited during Late Cretaceous Cenomanian time. In the study area it has a gross thickness ranging from 532 to 1,269 ft as derived from the drilled wells; the thickness rapidly decreases eastward toward the shelf edge and approaching the Shilaif basin. The Mishrif was divided into three third-order sequences based on core observations from seven wells and log signatures from 25 wells. The bottom-most sequence Mishrif 1.0 was identified is the thickest unit but was also found dry. The next identified sequence Mishrif 2.0 was also dry. The next and the uppermost sequence identified as Mishrif 3.0 shows a thickness from 123 to 328 ft. All the tested oil-bearing intervals lie within this sequence. This sequence was further subdivided into three fourth-order sequences based on log and core signatures; namely, Mishrif 3.1, 3.2, and 3.3. In six selected seismic lines of 181 Line Km (LKM) cutting across the depositional axis, seismic sequence stratigraphic analysis was carried out. In those sections all the visible seismic reflectors were picked using a stratigraphic interpretation software. Reflector groups were made to identify lowstand systems tract, transgressive systems tract, maximum flooding surface, and highstand systems tract by tying with the observations of log and core at the wells and by seismic signature. Wheeler diagrams were generated in all these six sections to understand the lateral disposition of these events and locales of their development. Based on stratigraphic analysis, a zone with likely grainy porous facies development was identified in Mishrif 3.0. Paleotopography at the top of Mishrif was reconstructed to help delineate areas where sea-level fall generated leaching-related sweet spots. Analysis of measured permeability data identified the presence of local permeability baffles affecting the reservoir quality and hydrocarbon accumulation. This study helped to identify several drilling locations based on a generic understanding of the Mishrif Formation. Such stratigraphic techniques can be successfully applied in similar carbonate reservoirs to identify the prospect areas.

scholarly journals Sequence Stratigraphic Analysis from Well Logs of an X-Field, Niger Delta, Nigeria

2016 ◽  
Vol 6 (2) ◽  
pp. 80-90
Author(s):  
Godwin Omokenu Emujakporue ◽  
Alphonsus Joseph Eyo
Keyword(s):  
Niger Delta ◽  
Well Logs ◽  
Sequence Stratigraphic ◽  
Stratigraphic Analysis

Sequence stratigraphic analysis of Eocene Rock Strata, Offshore Indus, southwest Pakistan

2016 ◽  
Vol 37 (3) ◽  
pp. 207-228 ◽  
Author(s):  
Natasha Khan ◽  
Khaista Rehman ◽  
Sajjad Ahmad ◽  
Jamil Khokher ◽  
M. Iqbal Hajana ◽  
...  
Keyword(s):  
Sequence Stratigraphic ◽  
Stratigraphic Analysis ◽  
Rock Strata
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