scholarly journals Insights on the evolution of the living Great Amazon Reef System, equatorial West Atlantic

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Michel Michaelovitch de Mahiques ◽  
Eduardo Siegle ◽  
Ronaldo Bastos Francini-Filho ◽  
Fabiano Lopes Thompson ◽  
Carlos Eduardo de Rezende ◽  
...  
Keyword(s):  
Large Scale ◽  
Oil And Gas ◽  
River Mouth ◽  
Habitat Diversity ◽  
Recent Criticism ◽  
Economic Activities ◽  
Oil And Gas Exploration ◽  
Living Organisms ◽  
Secondary Information ◽  
Mesophotic Reef

Abstract The Great Amazon Reef (GARS) is an extensive mesophotic reef ecosystem between Brazil and the Caribbean. Despite being considered as one of the most important mesophotic reef ecosystems of the South Atlantic, recent criticism on the existence of a living reef in the Amazon River mouth was raised by some scientists and politicians. The region is coveted for large-scale projects for oil and gas exploration. Here, we add to the increasing knowledge about the GARS by exploring evolutionary aspects of the reef using primary and secondary information on radiocarbon dating from carbonate samples. The results obtained demonstrate that the reef is alive and growing, with living organisms inhabiting the GARS in its totality. Additional studies on net reef growth, habitat diversity, and associated biodiversity are urgently needed to help reconcile economic activities and biodiversity conservation.

scholarly journals Fine description of sedimentary system in Wuerxun Sag of Hailaer Basin

2020 ◽  
Vol 194 ◽  
pp. 05048
Author(s):  
ZHOU Yue ◽  
GAO Geng ◽  
WANG Duanyang ◽  
YANG Xu
Keyword(s):  
Large Scale ◽  
Oil And Gas ◽  
Sedimentary Facies ◽  
Key Factors ◽  
Oil And Gas Exploration ◽  
Fan Delta ◽  
Sedimentary System ◽  
Sedimentary Microfacies ◽  
Surrounding Areas ◽  
Sand Bodies

Wuerxun depression is one of the depressions with great exploration potential in Hailaer Basin and has submitted large-scale reserves. At present, it has entered the stage of fine exploration, and the exploration object has changed from structural reservoir to lithologic reservoir exploration. The remaining targets are mainly concentrated in the trough and surrounding areas, with strong concealment and difficult to identify. Fine identification of sand bodies, genesis, types and distribution of sedimentary fans are one of the key factors restricting oil and gas exploration. Based on core observation and genetic mechanism, three sedimentary facies models of Braided River Delta, fan delta and sublacustrine fan are established. In this paper, the method of “sequence control, cycle correlation and hierarchical closure” is used to fine characterize the fan delta sedimentary system in this area, which lays a foundation for the study of sedimentary microfacies of subdivision layers, optimization of lithologic reservoir targets and guidance of oil and gas exploration deployment.

Overview of Accelerator Applications in Energy

2015 ◽  
Vol 08 ◽  
pp. 1-25 ◽  
Author(s):  
Robert W. Garnett ◽  
Richard L. Sheffield
Keyword(s):  
Large Scale ◽  
Oil And Gas ◽  
High Energy ◽  
Small Scale ◽  
Future Directions ◽  
Industrial Systems ◽  
Large Scale Systems ◽  
Oil And Gas Exploration ◽  
Exploration And Production ◽  
Accelerator Technology

An overview of the application of accelerators and accelerator technology in energy is presented. Applications span a broad range of cost, size, and complexity and include large-scale systems requiring high-power or high-energy accelerators to drive subcritical reactors for energy production or waste transmutation, as well as small-scale industrial systems used to improve oil and gas exploration and production. The enabling accelerator technologies will also be reviewed and future directions discussed.

Mapping large-scale microseepage signals for supporting oil and gas exploration in new ventures

2016 ◽  
Author(s):  
Marco Gianinetto ◽  
Federico Frassy ◽  
Andrea Marchesi ◽  
Pieralberto Maianti ◽  
Riccardo De Paulis ◽  
...  
Keyword(s):  
Large Scale ◽  
Oil And Gas ◽  
New Ventures ◽  
Oil And Gas Exploration

scholarly journals Sedimentation-capacity model of the subsalt deposits of the Southern Urals and adjoining territories

Georesursy ◽  
2019 ◽  
Vol 21 (2) ◽  
pp. 94-109
Author(s):  
Valentina A. Zhemchugova ◽  
Grigoriy G. Akhmanov ◽  
Yuri V. Naumchev ◽  
Viktor V. Pankov ◽  
Evgenia E. Karnyushina
Keyword(s):  
Large Scale ◽  
Oil And Gas ◽  
Complex Structure ◽  
Southern Urals ◽  
Carbonate Sediments ◽  
Reservoir Properties ◽  
The Southern Urals ◽  
Oil And Gas Exploration ◽  
Capacity Model ◽  
Hydrocarbon Productivity

The junction zone of the Caspian syneclise, the Russian Plate and the Pre-Ural trough is characterized by a complex structure. It has been studied in some detail during large-scale geological, geophysical, and drilling operations in the search for mineral deposits. Subsalt deposits are associated with the main prospects for the growth of hydrocarbon reserves in this region. This makes it important to rethink the available data and conduct scientific analysis to identify patterns of formation of sedimentary complexes and an integrated assessment of their possible hydrocarbon productivity by means of sedimentation modeling. The structure and history of the formation of five large sedimentary complexes: the Ordovician-Lower Devonian, the Central Middle Devonian, the Frasnian-Tournaisian, the Visean-Upper Carboniferous, and the Permian are considered in detail. For each complex, a structural-formational position and sedimentation conditions are determined, which should determine the hydrocarbon productivity of local objects. The revealed relationship between the conditions of carbonate sediments accumulation and their potential reservoir properties served as the basis for forecasting the productivity of regional natural reservoirs. The paper presents a generalized model of the formation of subsalt strata and the forecast of the spatial distribution of different facies deposits, which play the role of accumulating and preserving strata. The results obtained are applicable in the practice of oil and gas exploration in the region

Development of a MEMs gravimeter for drone-based field surveys.

2020 ◽  
Author(s):  
Elizabeth Passey ◽  
Giles Hammond ◽  
Steven Bramsiepe ◽  
Abhinav Prasad ◽  
Richard Middlemiss ◽  
...  
Keyword(s):  
Large Scale ◽  
Oil And Gas ◽  
Low Cost ◽  
Earth Tides ◽  
Mems Accelerometer ◽  
Oil And Gas Exploration ◽  
Gravitational Fields ◽  
Gravimetric Survey ◽  
Wide Range ◽  
Aerial Vehicle

<p>Gravimetry allows us to study sub-surface structures remotely by measuring changes in Earth's surface gravitational field and using this data to infer the density of geological structures. Of its wide range of applications, it is mostly used in the oil and gas exploration industry, volcanology, civil engineering and even archaeological studies. Airborne gravimetry is a vital method of conducting a spatial gravimetric survey in areas which are difficult to access by foot, such as mountains. Generally, sensors are modified for air crafts platforms by installing them on large gimbal systems, or a strap-down gravimeter can be used as a lower-cost alternative. Now, a new MEMs gravimeter called “Wee-g” is enabling the development of a system to deploy the gravimeter on an unmanned aerial vehicle (UAV or drone). Wee-g was first developed with the objective of developing a low-cost MEMS accelerometer for gravimetric use which could be manufactured on a large scale. In 2016, Wee-g was used to measure Earth tides - the elastic deformation of the Earth caused by gravitational fields of the Moon and Sun. Since then, the device electronics have been miniaturised to make the system portable and has been tested at the Campsie Hills just north of Glasgow. Work is underway to build an isolation platform with active stabilisation on which the Wee-g can be mounted to be deployed on a drone which will reduce airborne surveys costs further and allow for more airborne gravimetric surveys to be carried out in remote locations.</p>

Research Progress on Anti-Corrosive Properties of Graphene Modified Coatings

2020 ◽  
Vol 993 ◽  
pp. 1140-1147
Author(s):  
Li Juan Zhu ◽  
Chun Feng ◽  
Hong Jiang Ge ◽  
Ya Qiong Cao ◽  
Li Hong Han ◽  
...  
Keyword(s):  
Large Scale ◽  
Oil And Gas ◽  
Service Performance ◽  
Research Progress ◽  
Oil And Gas Exploration ◽  
Structure And Morphology ◽  
Excellent Corrosion Resistance ◽  
Fundamental Research ◽  
Future Work

Graphene modified coatings have attracted extensive attention in recent years due to their excellent corrosion resistance and broad application prospects in the field of anti-corrosion. However, large-scale applications of graphene coatings were seldom reported, which is mainly attributed to the lack of fundamental research on the anti-corrosive mechanism and the long-term service performance evaluation of graphene modified coatings in actual working conditions. In the present work, the influence of the characteristics of corrosive medium, the content of graphene, the structure and morphology of graphene and the external environmental conditions on the anti-corrosive performance of graphene modified coatings were systematically reviewed. The deficiencies in the research of anti-corrosive performance of graphene modified coatings were summarized. The future work were prospected for the anti-corrosive performance and applications of graphene modified coatings in oil and gas exploration.

scholarly journals Wireless Geophone Networks for Land Seismic Data Acquisition: A Survey, Tutorial and Performance Evaluation

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5171
Author(s):  
Aliyu Makama ◽  
Koojana Kuladinithi ◽  
Andreas Timm-Giel
Keyword(s):  
Performance Evaluation ◽  
Data Acquisition ◽  
Seismic Data ◽  
Large Scale ◽  
Oil And Gas ◽  
Control Unit ◽  
Optimal Number ◽  
Small Scale ◽  
Oil And Gas Exploration ◽  
Seismic Data Acquisition

Seismic data acquisition in oil and gas exploration employs a large-scale network of geophone sensors deployed in thousands across a survey field. A central control unit acquires and processes measured data from geophones to come up with an image of the earth’s subterranean structure to locate oil and gas traps. Conventional seismic acquisition systems rely on cables to connect each sensor. Although cable-based systems are reliable, the sheer amount of cable required is tremendous, causing complications in survey logistics as well as survey downtime. The need for a cable-free seismic data acquisition system has attracted much attention from contractors, exploration companies, and researchers to lay out the enabling wireless technology and architecture in seismic explorations. This paper gives a general overview of land seismic data acquisition and also presents a current and retrospective review of the state-of-the-art wireless seismic data acquisition systems. Furthermore, a simulation-based performance evaluation of real-time, small-scale wireless geophone subnetwork is carried out using the IEEE 802.11 g technology based on the concept of seismic data acquisition during the geophone listen or recording period. In addition, we investigate an optimal number of seismic samples that could be sent by each geophone during this period.

Main approaches to estimating the cost of shareholder equity of oil and gas producers

2020 ◽  
Vol 26 (3) ◽  
pp. 685-697
Author(s):  
O.V. Shimko
Keyword(s):  
Oil And Gas ◽  
Oil Prices ◽  
Minimum Cost ◽  
Free Cash Flow ◽  
Annual Reports ◽  
Comparative Approach ◽  
Economic Activities ◽  
Advantages And Disadvantages ◽  
Oil And Gas Producers ◽  
The Cost

Subject. The study analyzes generally accepted approaches to assessing the value of companies on the basis of financial statement data of ExxonMobil, Chevron, ConocoPhillips, Occidental Petroleum, Devon Energy, Anadarko Petroleum, EOG Resources, Apache, Marathon Oil, Imperial Oil, Suncor Energy, Husky Energy, Canadian Natural Resources, Royal Dutch Shell, Gazprom, Rosneft, LUKOIL, and others, for 1999—2018. Objectives. The aim is to determine the specifics of using the methods of cost, DFC, and comparative approaches to assessing the value of share capital of oil and gas companies. Methods. The study employs methods of statistical analysis and generalization of materials of scientific articles and official annual reports on the results of financial and economic activities of the largest public oil and gas corporations. Results. Based on the results of a comprehensive analysis, I identified advantages and disadvantages of standard approaches to assessing the value of oil and gas producers. Conclusions. The paper describes pros and cons of the said approaches. For instance, the cost approach is acceptable for assessing the minimum cost of small companies in the industry. The DFC-based approach complicates the reliability of medium-term forecasts for oil prices due to fluctuations in oil prices inherent in the industry, on which the net profit and free cash flow of companies depend to a large extent. The comparative approach enables to quickly determine the range of possible value of the corporation based on transactions data and current market situation.

Financial and Economic Support of Innovation Processes in the Russian Fuel and Energy Complex

2019 ◽  
Vol 12 (3) ◽  
pp. 77-85
Author(s):  
L. D. Kapranova ◽  
T. V. Pogodina
Keyword(s):  
Oil Recovery ◽  
Large Scale ◽  
Oil And Gas ◽  
New Technologies ◽  
Innovative Development ◽  
Oil Reserves ◽  
Energy Complex ◽  
Innovation Activities ◽  
Substantial Investment ◽  
The Government

The subject of the research is the current state of the fuel and energy complex (FEC) that ensures generation of a significant part of the budget and the innovative development of the economy.The purpose of the research was to establish priority directions for the development of the FEC sectors based on a comprehensive analysis of their innovative and investment activities. The dynamics of investment in the fuel and energy sector are considered. It is noted that large-scale modernization of the fuel and energy complex requires substantial investment and support from the government. The results of the government programs of corporate innovative development are analyzed. The results of the research identified innovative development priorities in the power, oil, gas and coal sectors of the fuel and energy complex. The most promising areas of innovative development in the oil and gas sector are the technologies of enhanced oil recovery; the development of hard-to-recover oil reserves; the production of liquefied natural gas and its transportation. In the power sector, the prospective areas are activities aimed at improving the performance reliability of the national energy systems and the introduction of digital technologies. Based on the research findings, it is concluded that the innovation activities in the fuel and energy complex primarily include the development of new technologies, modernization of the FEC technical base; adoption of state-of-the-art methods of coal mining and oil recovery; creating favorable economic conditions for industrial extraction of hard-to-recover reserves; transition to carbon-free fuel sources and energy carriers that can reduce energy consumption and cost as well as reducing the negative FEC impact on the environment.

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