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Abstract The objective of this study is to understand the configuration of different deformation styles in post-salt sedimentary succession of Lower Congo Basin. Emphasis is placed on structural characteristics with respect to the thickness of salt and the geometry of the base of salt detachment. Owing to its weak visco-plastic properties, salt is very effective at decoupling deformation in pre- and post-salt sequences. Gravity and density driven deformation in the post-salt sediments is predominately controlled by salt thickness and changes in dip at the base of salt. Variations in these elements change across the basin which control the nature and timing of trap development. Using regional 2D and 3D seismic depth cubes, interpretation focused on the Aptian Salt and post-salt Cretaceous-Tertiary sedimentary succession. Here we map and identify various deformation styles in salt tectonics across the basin within which we observe consistent trap geometries which are containing hydrocarbons and resulting one of the prolific basins in the world for oil production. The post-salt sediments, present a classic example of gravity driven deformation associated with salt tectonics at a passive margin. Gravity driven structuration of (i) Extension, (ii) Translation and (iii) Compression can be observed along regional dip-sections. Through detailed mapping, various sub-domains provide an insight into the regional structural trends and tectonic evolution in the post-salt succession. Overall, ten structural domains have been identified from Shelf to distal basin along the regional dip section. Well defined structural domains can play a major role in classifying the trapping styles for hydrocarbon accumulations in post-salt successions. Identification of these domains provides a framework to de-risk different trap styles or highlights those traps which carry a higher trap risk. Timing of trap formation due to salt movement also plays a major role to further de-risk these traps. The main source rock for Post-salt section is located in Senonian interval, the charge modelling suggests the peak expulsion of hydrocarbon in Early Miocene time, therefore those traps formed in Oligocene to Early Miocene intervals have higher chance of trapping hydrocarbons, however traps formed from Mid – Miocene to younger levels have higher risk of trapping smaller or no hydrocarbons due to lack of charge availability.
- Phanerozoic > Mesozoic > Cretaceous (1.00)
- Phanerozoic > Cenozoic > Neogene > Miocene > Early Miocene (0.47)
- Africa > Namibia > South Atlantic Ocean > Orange Basin (0.99)
- Africa > Gabon > South Gabon Basin (0.99)
- Africa > Angola > South Atlantic Ocean > Lower Congo Basin (0.99)
- (2 more...)
Note in Figure 4 that the middle to outer of the outer shelf-upper slope area.
- North America > United States > Texas (0.52)
- North America > United States > Gulf of Mexico > Western GOM (0.16)
- Phanerozoic > Cenozoic > Neogene > Pliocene (0.69)
- Phanerozoic > Cenozoic > Quaternary > Pleistocene (0.41)
- Geology > Sedimentary Geology (1.00)
- Geology > Geological Subdiscipline > Stratigraphy > Biostratigraphy (0.66)
- Geophysics > Seismic Surveying (1.00)
- Geophysics > Borehole Geophysics (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Seismic processing and interpretation (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Geologic modeling (1.00)
- Reservoir Description and Dynamics > Formation Evaluation & Management > Open hole/cased hole log analysis (1.00)
Numerical Diagnostic Study On Dominant Species Succession Mechanism During HAB In the High Frequent HAB Occurrence Area In the East China Sea
Wang, Qing (Naval Architecture and Ocean Engineering R & D Center of Guangdong Province, South China University of Technology) | Zhu, Liangsheng (Naval Architecture and Ocean Engineering R & D Center of Guangdong Province, South China University of Technology) | Hu, Jinpeng (Naval Architecture and Ocean Engineering R & D Center of Guangdong Province, South China University of Technology)
ABSTRACT By applying a harmful algal bloom (HAB) mathematical model of competition between two algae species, numerical diagnostic experiments designed for several impact factors are conducted to study the dominant species succession mechanism during HAB in the high frequent HAB occurrence area in the East China Sea. The results show that: assuming sea water temperature increased by 3°C, only a single-species HAB of Prorocentrum donghaiense (P.d) occurs instead of species succession; assuming phosphate concentration in this area remaining above 0.6mmol/m, the phenomenon of dominant HAB species succession is still there with a shorter time of incubation and a longer time of maintaining. This study not only reveals the sea water temperature plays a important role in the HAB process of species succession above-mentioned, but also suggests long period of eutrophication status in this area in this area is one of the leading causes of early outbreak and long-time maintaining of HAB in spring. INTRODUCTION The East China Sea (ECS) is the highest annual HAB-occurrence-number area of China's coastal waters, and most of HABs occur in the Yangtze River Estuary and its adjacent water (28°00′ - 34°00′N, 120°00"-124°00′E) which is known as the high frequent HAB occurrence area of ECS (Fig. 1). Statistical data indicates that the frequency and scale of HAB occurrence increases year by year in this area (Tang et al, 2006). Analysis of field survey data of this area showed that diatom and dinoflagellate became successively the dominant species during HAB in the spring of 2005 (Zhang et al, 2008). Research results from in-situ observations (Liu et al, 2005; Jiang et al, 2009) and ecological experiments (Cai et al, 2005; Li et al, 2005; Wang et al, 2008; Zhao et al, 2009; Hu et al, 2011), not only provide reasonable ecological parameters for single-species growth rate, but also describe the influence of algal ecological adaptation strategy and interspecific competition mechanism on population succession during HAB.
- Health & Medicine > Diagnostic Medicine (0.40)
- Materials > Chemicals (0.39)
Abstract As every organization grows they need to ensure that processes are in place to attract, retain and develop their talent. Succession Planning and Management is a strategic process that focuses on creating a sustainable value chain of high potential talent who have the requisite knowledge and skills to lead and manage new organizational requirements and address business challenges. To manage this process they need to adapt a range of methodologies to select, measure and distinguish between those who are truly high performers with potential. Abu Dhabi Company for Onshore Oil Operations has implemented the succession planning system from way back in 2006 in preparation for significant challenges in the horizon for which the organization needed to be prepared for:. The challenges included: Growth in production targets from 1.4 Mbpd to 1.8 Mbpd by 2017 Maturing and more complex fields The need for new technology to be installed to enhance recovery and oil extraction The emerging crew change brought forth by aging manpower and experience dilution and the steep learning curve for newcomers. Reaching the Emiratization target (75%) by 2017, Implementing a succession plan process within the company was seen as one of the significant intitiatives to support the development of technical capabilities and leadership capacity to address these challenges.
Although the exploration activities in the Mediterranean have more than 40 years, the Oligocene succession has been completely drilled in just few wells. Recently, the petroleum companies working in the Mediterranean, started to focus and test the Oligocene rocks. The present study is a trial to subdivide the Oligocene succession in the Mediterranean offshore into local biostratigraphic units with reference to their equivalent international biozones. This can help in follow up the Oligocene successions while drilling and to support the geological studies and correlating the Oligocene sections within and / or along the Mediterranean gas fields. The detailed micro paleontological investigation carried out on a few, recently drilled Oligocene sections in Port Fouad Marine concession, referred to prevalence of shallow open marine environmental conditions as indicated by the presence of long range benthic (mostly agglutinated) forams occasionally associated with rare to common planktonics of low diversity. The identification of all foraminiferal taxa and the detection of their local stratigraphic ranges, diversity and density in the studied sections permitted to establishment a local biostratigraphic zonation in a schematic form. Also the relative sea level fluctuation and the possible paleonvironmental conditions prevailed during the deposition of the Oligocene sediments have been interpreted.