scholarly journals Dynamics of vegetation changes in oil and salt-contaminated oligotrophic ridge-hollow mire complexes after reclamation (Middle Pre-Ob region, Khanty-Mansi Autonomous Okrug – Yugra)

2020 ◽  
Vol 10 (3) ◽  
pp. 306-350
Author(s):  
Ekaterina A. Shishkonakova
Keyword(s):  
West Siberia ◽  
Oil Fields ◽  
Medium Term ◽  
Eriophorum Angustifolium ◽  
Leading Role ◽  
Moss Layer ◽  
Carex Rostrata ◽  
Oxycoccus Palustris ◽  
Khanty Mansi Autonomous ◽  
Eutrophic Species

Oligotrophic ridge-hollow and ridge-hollow-pool complex mires are widely distributed in the central part of West Siberia, including many oil fields of the Middle Pre-Ob region. The article considers the dynamics of re-vegetation of oil and salt-contaminated areas of these mire types subjected to reclamation. Survey materials for 2–3 years and 15 years after reclamation allow to identify the main trends in vegetation restoration in the short and medium term. The reversible oligotrophication of ridges manifests in a relative decrease in the participation of the meso-eutrophic species on contaminated mire sites. In the hollows, however, the similar trend can be traced only in relation to oil-contaminated sites, whereas in the salt-contaminated hollows, the strong eutrophic conditions last. In the medium-term perspective, most typical oligotrophic hollow species, with the exception of Eriophorum russeolum and Oxycoccus palustris, were unable to recover. In the course of dynamic changes in the vegetation, the leading role in recovery successions gradually passes to mesotrophic and eutrophic species possessing massive root systems and aerenchyma – Eriophorum angustifolium, Phragmites australis, Carex rostrata, etc. Restoration of the moss layer is several years behind that of the grass layer, and due to the lack of competition, the participation of liverworts in it is of great importance, especially in salt spills. At the same time, among mosses as in the case of vascular species mesotrophic components are the main dominant ones15 years after reclamation.

New records of aphyllophoroid fungi (Basidiomycota) for the Khanty-Mansi Autonomous Area — Yugra (West Siberia)

2020 ◽  
Vol 54 (2) ◽  
pp. 387-396
Author(s):  
I. V. Stavishenko
Keyword(s):  
Animal Ecology ◽  
New Records ◽  
West Siberia ◽  
The West ◽  
First Time ◽  
Khanty Mansi Autonomous ◽  
Aphyllophoroid Fungi

The paper provides data on records of 29 species of aphyllophoroid fungi new for the the Khanty-Mansi Autonomous Area — Yugra. Among them 10 species (Amaurodon cyaneus, Amyloxenasma allantosporum, Asterostroma laxum, Byssoporia terrestris, Paullicorticium pearsonii, Pseudomerulius montanus, Sistotrema sernanderi, Skeletocutis alutacea, S. ochroalba, Tubulicrinis orientalis) are published for the first time for Siberia, and 3 species (Scytinostroma praestans, Tomentellopsis zygodesmoides, Tubulicrinis strangulatus) are new for the West Siberia. Data on their locations, habitats and substrates in region are indicated. The specimens are kept in the Museum of the Institute of Plant and Animal Ecology of the Ural Branch of the RAS (SVER).

scholarly journals Interrelation of hydrochemical indicators and the microbial community structure in the rivers within oil fields of the Khanty-Mansi Autonomous Okrug – Yugra

2021 ◽  
Vol 10 (1) ◽  
pp. 20-23
Author(s):  
Marina Magomedovna Arslanova ◽  
Elena Aleksandrovna Shornikova
Keyword(s):  
Correlation Analysis ◽  
Oil And Gas ◽  
Inverse Correlation ◽  
Water Quality Monitoring ◽  
Total Iron ◽  
Oil Fields ◽  
Environmental Objects ◽  
Number Of Microorganisms ◽  
Khanty Mansi Autonomous

Assessing the quality of environmental objects, identifying the causes of pollution and predicting the future state is an urgent and important task, since it is the quality of natural objects that largely determines the state of human health. This paper presents results of the statistical analysis of the data of water quality monitoring in the rivers within oil fields of the Khanty-Mansi Autonomous Okrug Yugra during 20182019. The correlation analysis (according to Pearson) was carried out to identify the relationships between the samples of hydrochemical parameters and the number of microorganisms of various ecological-trophic groups. As a result of the correlation analysis of the relationship between the indicators of the chemical composition of water, a direct and inverse correlation was obtained for the following indicators: total iron, anionic surfactants, nickel, phenols, copper, sulfates, ammonium ions, lead, phosphates, manganese. The maximum value of the correlation coefficient is observed for Ni and Cr concentrations. For total iron and manganese, a significant positive correlation is also revealed. The distribution of chemical compounds in the rivers doesnt have a pronounced correlation dependence, which is probably due to the heterogeneity of the composition of the waters, as well as to the increasing impact on the environment of the oil and gas complex.

Angolan government will push for oil sector boost

2019 ◽  
Keyword(s):  
Foreign Exchange ◽  
Deep Water ◽  
Oil Fields ◽  
New Wave ◽  
Foreign Exchange Reserves ◽  
Medium Term ◽  
Institutional Reforms ◽  
Content Type ◽  
Oil Sector

Significance This is the first major test of recent legislative and institutional reforms as President Joao Lourenco’s government looks to bring in new players and revitalise the sector. New exploration is badly needed to restore dwindling production, alongside measures to monetise gas reserves and smaller oil fields, in addition to the large deep-water fields that have traditionally attracted oil majors. Impacts New oil discoveries are the best short-to-medium term hope for shoring up Angola’s foreign exchange reserves. If successful, the licensing round could bring a new wave of offshore exploration and deliver a boost to ports and services industries. The ANPG hopes to put new discoveries on production from 2026 to replace output as existing fields decline. Activity in southern Angola will also affect sentiment in neighbouring Namibia, where oil majors have recently taken new acreage.

Salt pollution of surface water in oil fields of Khanty-Mansi Autonomous Area-Yugra

2017 ◽  
Vol 44 (1) ◽  
pp. 128-138 ◽  
Author(s):  
D. V. Moskovchenko ◽  
A. G. Babushkin ◽  
A. A. Ubaidulaev
Keyword(s):  
Surface Water ◽  
Oil Fields ◽  
Khanty Mansi Autonomous

scholarly journals Primary and secondary succession on wooded peat-bogs

10.5586/1160 ◽  
2014 ◽  
Vol 61 (1) ◽  
pp. 89-102 ◽  
Author(s):  
Robert Neuhäusl
Keyword(s):  
Final Stage ◽  
Secondary Succession ◽  
Peat Bogs ◽  
Trophic Conditions ◽  
Natural Succession ◽  
Eriophorum Angustifolium ◽  
Land Drainage ◽  
Carex Rostrata ◽  
Pine Stands ◽  
Succession Series

Study of primary and secondary succession on wooded peat- bogs are presented. Research has been done on a complex of mountain peat-bogs in the Bohemian Moravian Highland (Czechoslovakia). Natural succession series began with reed sedge and reed stands and terminated with <i>Viccinio uliginosi-Pinetum</i>, <i>Calamagrostio villosae-Piceatum</i> and <i>Alnion glutinosae</i> uder oligotrophic, oligo-mesotrophic and meso-eutrophic conditions, respectively. In marginal parts of peat-bogs (lagg) sedge fens are followed by birch cart. Open pine stands (<i>Pino rotundatae-Sphagnetum</i>) is submitted to cyclic succesion. The secondary succession may begin with the <i>Sphagnum cuspidatum</i>, <i>Eriophorum angustifolium</i> or <i>Carex rostrata</i>, and <i>Carex rostrata</i> stages, depending on trophic conditions of water. The final stage is usually <i>Vaccinio uliginosi</i>-<i>Pinetum</i> or <i>Pino rotundatae</i>-<i>Spagnetum</i>. Secondary succession pattern is influenced both by eutrophication and peat-land drainage.

scholarly journals Diversity of desmid algae (Charophyta: Conjugatophyceae) in the vicinity of Yugorsk city (KMAO-Yugra, Russia)

2019 ◽  
Vol 56 ◽  
pp. 11-22
Author(s):  
Andrei S. Shakhmatov ◽  
Evgeniy V. Pavlovskiy
Keyword(s):  
West Siberia ◽  
Annotated List ◽  
Khanty Mansi Autonomous

The article provides an annotated list, which contains 35 species and subspecific taxa of desmid algae collected in 2015 in swamps near Yugorsk city, West Siberia. Twelve species (Closterium costatum, Cosmarium regnesi, Euastrum ansatum, E. gayanum, E. pulchellum, Staurastrum aculeatum, S. arcuatum var. subavicula, S. tohopekaligense, Staurodesmus dickiei var. circularis, S. glaber, Xanthidium cristatum, X. uncinatum) and one variety (Closterium closterioides var. intermedium) are new for the Khanty-Mansi Autonomous Okrug. Data on morphology and distribution of the species are provided.

scholarly journals Hygienic environmental assessment in the oil-and-gas bearing area on the base of cytogenetical and molecular-genetic methods

2019 ◽  
Vol 96 (2) ◽  
pp. 121-124
Author(s):  
N. N. Ilyinskikh ◽  
E. N. Ilyinskikh ◽  
I. N. Ilyinskikh ◽  
A. E. Yankovskaya ◽  
Stanislav A. Saushkin
Keyword(s):  
Oil And Gas ◽  
Micronucleus Test ◽  
Molecular Genetic ◽  
Oil Fields ◽  
Control Group ◽  
The North ◽  
Xenobiotic Biotransformation ◽  
Elevated Rate ◽  
Gas Bearing ◽  
Khanty Mansi Autonomous

The study have been conducted in settlements located near oilfields of the Nizhnevartovsk area, the Khanty-Mansi autonomous district (Russian Federation). There were examined 802 persons aged of from 18 to 56 years not proximately employed in processes of the oil extraction. Control group was consisted of329 residents of the north of Tomsk Region living in the area without any polluting environment industry. By using such methods of analysis as micronucleus test in human buccal cells, the xenobiotic biotransformation of both GSTM1 and GSTT1 gene polymorphism, as well as the assessment of oil contamination of local drinking water there was executed the hygienic assessment of ecology in the settlements located near oil fields. The elevated rate of cytogenetic disorders was established to be observed most of all in the residents of this region, as well as in persons recently moved to this area. Most significant deviations from the control according to the micronucleus test were detected in individuals with the GSTM1 (0) /GSTT1(0) genotype. In the control group no such consistent pattern was seen.

A Middle East View of the Global Oil Situation

2002 ◽  
Vol 20 (6) ◽  
pp. 451-455
Author(s):  
A.M. Samsam Bakhtiari
Keyword(s):  
International Institutions ◽  
Oil And Gas ◽  
Middle Eastern ◽  
Primary Energy ◽  
Oil Fields ◽  
Medium Term ◽  
Oil Companies ◽  
Deep Waters ◽  
The Press ◽  
Present Decade

Seen from a Middle Eastern perspective, the present global oil situation can be summarised within five major and inescapable trends: 1 The world's super giant and giant oil fields are dying off; 2 There are no more major frontier regions left to explore besides the earth's poles; 3 Production of non-conventional crude oil has been initiated at great costs – in Venezuela's Orinoco belt, Canada's Athabasca tar sands and ultra-deep waters; 4 Even OPEC's oil production has its limits; 5 No major primary energy rival can possibly take over from oil and gas in the medium term. Adding up these five trends, one can envision a global oil crunch at the horizon — – most probably within the present decade. Unfortunately, however, the general public will not heed such a rational vision. And, even if it did, it would be loath to respond to the implied threat. In its defence, it should be said that many actors are constantly and consistently reassuring it: the press (even parts of the specialised press), most politicians, some international institutions, a couple of major oil companies and naturally OPEC. But this can only last until petrol stations post ‘empty’, natural gas supplies are suddenly shunted and, eventually, the lights go off.

scholarly journals STATE, CHALLENGES AND PROSPECTS OF DEVELOPMENT OF THE METHOD FOR SIMULTANEOUS-SEPARATE OPERATION OF WELLS USING ECP UNITS IN THE MULTIHORIZON FIELDS OF WEST SIBERIA

2015 ◽  
pp. 19-25
Author(s):  
V. A. Afanasiev ◽  
S. N. Bastrikov ◽  
V. A. Popov
Keyword(s):  
Oil Recovery ◽  
Rate Control ◽  
Current Flow ◽  
West Siberia ◽  
Commercial Production ◽  
Oil Fields ◽  
Flow Rates ◽  
Speed Up ◽  
Flow Rate Control ◽  
Pumping Units

To create the operable equipment for simultaneous-separate operation of wells by electrical centrifugal pumping units (“SSO-ECP”) the experience gained by domestic and foreign specialists in this equipment designing, manufacturing and introduction was studied. It is offered to experimentally apply the assembly of SSO-ECP -A unit in wells being in operation for development of multihorizon fields with the purpose to increase these horizons oil recovery factor and current flow rates of wells. It is shown that for perspective development of SSO-ECP it is necessary to speed up the designing process and to arrange the commercial production of automated well systems of flow rate control and water encroachment of layers separated in the borehole, well chokes, and to prepare the industry «Methodical recommendations for designing the SSO technologies in multihorizon oil fields of Russia».

scholarly journals SPECIFIC FEATURES OF DEVELOPMENT OF WEST SIBERIA TURONIAN DEPOSITS BY BRANCHED-HOLE GAS WELLS

2015 ◽  
pp. 50-52
Author(s):  
I. A. Kustyshev ◽  
A. V. Kustyshev
Keyword(s):  
Arctic Region ◽  
West Siberia ◽  
Oil Fields ◽  
The Arctic ◽  
Gas Wells ◽  
Wide Experience ◽  
Extreme North ◽  
Gas Fields ◽  
The Arctic Region

The use of branched-hole wells in old fully developed oilfields permits to increase hydrocarbons production at the expense of involving the undrained areas in development. The most wide experience of multihole wells operation in Russia was gained in oil fields; and in gas fields the construction of such wells was launched in the field Yujno-Russkoye, West Siberia. The gained experience in designing, construction and operation of multihole wells in the Extreme North fields will enable to recommend these designs in the Arctic region conditions including offshore fields.

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