Analysis of Depositional Environment within Karaton-Tengiz Uplift Zone in Southeastern Part of the Pre-Caspian Basin

2018 ◽  
Author(s):  
Bazar Yeskozha ◽  
Marat Aimagambetov ◽  
Saltanat Ismagulova
Keyword(s):  
Depositional Environment ◽  
Caspian Basin ◽  
Southeastern Part ◽  
Uplift Zone

Seismic Facies Analysis of Lower Productive Series of Gurgan-Deniz Field in South Caspian Basin with the Aid of Seismic Attributes

2021 ◽  
Author(s):  
Ulvi Zamanbayov
Keyword(s):  
Sea Level ◽  
Mass Flow ◽  
Depositional Environment ◽  
Facies Analysis ◽  
Seismic Facies ◽  
Seismic Survey ◽  
Caspian Basin ◽  
South Caspian Basin ◽  
Migration Pathways ◽  
First Time

Abstract Drilled for the first time in 1946 and one of the oldest fields in the South Caspian Basin located in the western part of Apsheron sill, Gurgan-Deniz has been subject to redevelopment. A 3D seismic survey, conducted over the area for the first time, has been interpreted, analysing the lower Productive Series with regard to seismic facies and prospectivity. The facies analysis allows for better understanding of eustatic levels in the region and depositional environments of lower Productive Series in the area. A composite seismic attribute Sweetness and an RGB blend of Spectral Decomposition have been applied to the 3D volume, as well as to the interpreted stratigraphic surfaces. With the aid of the attributes and petrophysical well description, direct and indirect facies interpretation have been carried out. First, considering reflection parameters such as parallelism, continuity and hummockiness, as well as sedimentary features. Subsequently, reaching conclusions on depositional processes, environments, and geological evolution. Finally, analysing field prospectivity and migration pathways. Eight seismic facies have been identified by analysing stratigraphic horizons representing the tops of Kalin Suite (KaS), Pre-Kirmaky Sand Suite (PK) and Kirmaky Suite (KS). Facies have been interpreted as mass-flow deposits, amalgamated channel systems, channel and bar systems, sheetflow and floodplain deposits in a varying lacustrine-fluvial environment. KaS has been deposited following a sea- level drop and increased sediment inflow from Palaeo-Volga. The origin of the mass-flow facies is thought to be related to the increase of sedimentation speed, as well as tectonics decreasing the terrace stability. PK shows evidence of further sea-level drop and shows mainly fluvial depositional environment. Starting from KS, sea level has started to rise, once again showing mixed depositional environment. Attribute anomalies have been explored in the lower wing of the anticline structure in PK and KaS. A 3-way trap and possible migration pathways generate considerable risks.

scholarly journals THE USE OF FORAMINIFERA FOSSILS FOR RECONSTRUCTING THE YOGYAKARTA GRABEN, YOGYAKARTA, INDONESIA

2015 ◽  
Vol 2 (2) ◽  
Author(s):  
Didit Hadi Barianto ◽  
Pentatok Kuncoro ◽  
Koichiro Watanabe
Keyword(s):  
Depositional Environment ◽  
Initial Position ◽  
Uplift Rate ◽  
The West ◽  
Southeastern Part ◽  
Central Java ◽  
Central Depression ◽  
Uplift Rates

The Yogyakarta region is located in the southeastern part of Central Java, Indonesia. The region forms an elongated northeast – southwest-trending central depression bordered by two parallel faults in the west and east. These major faults divided the area into three parts, including the western, central and eastern parts. Herein, we investigate the relative uplift rate of the each part by using planktonic and benthonic foraminiferas. The foraminifera will show the initial position/datum of each part before uplift. Over sixty samples (primarily limestones and marls) were taken for this research. The uplift rates of each part were different and created a depressed block control by way of parallel faults. Based on foraminifera fossil observations, each block was in the same depositional environment (inner neritic) during N9. The present positions indicate that the western part was uplifted higher than the others, with this part being uplifted more than 590 meters. The central part was uplifted less than 120 meters, and the eastern part was uplifted above an altitude of 170-300 meters. Keywords: Foraminifera fossil, planktonic, benthonic, graben, uplift

Pilot study of fossil evidence of onshore-directed storm events in estuarine sediments: Chezzetcook Inlet, Nova ScotiaNatural Resources Canada Climate Change Impacts and Adaptation Program SST 20090027.

2009 ◽  
Vol 46 (3) ◽  
pp. 193-205 ◽  
Author(s):  
Charles T. Schafer ◽  
Franco S. Medioli
Keyword(s):  
Depositional Environment ◽  
Sediment Cores ◽  
Climate Change Impacts ◽  
Estuarine Sediments ◽  
Storm Events ◽  
Southeastern Part ◽  
Planktic Foraminifera ◽  
Sudden Appearance ◽  
Depositional Setting ◽  
Seawater Exchange

Sediment cores collected from the landward side of a baymouth barrier in a lower estuarine environment of Chezzetcook Inlet contain proxy “signals” of onshore-directed storms that are manifested by the sudden appearance of benthic and planktic Foraminifera species. These taxa have been eroded and transported from adjacent inner shelf open-marine environments. One relatively strong onshore-directed storm (hurricane?) event appears to have caused a reduction in seawater exchange in the southeastern part of the inlet that persisted for at least several decades. In this particular barrier-protected lower estuarine depositional environment, foraminiferal storm-indicator species distributions in older sediments seem to be spatially patchy. Consequently, in this Chezzetcook depositional setting, the successful reconstruction of a complete proxy storm record will require replicate coring and high-frequency core subsampling strategies.

Sign in / Sign up

Export Citation Format

Share Document