COMPARISON OF DIATOMS IN WELL AND DRENOVAĈA SWAMP IN VELINO SELO VILLAGE, IN BOSNIA AND HERZEGOVINA
Parallel with the research of Bacillariophyta flora in the well with shadoof on the area of Semberija was researched Bacillariophyta flora of other freshwater systems that are located in the near or distant environment from the researched wells, such as Drenovaĉa swamp, Sava river, Jelaz canal, artesian wells and ephemeral swamps. It is very intere...
By Milenko Ćurĉić, Dragica Milinković, Dragana Radivojević, Dijana Đurić
VERTICAL DISTRIBUTION OF DIATOMS ON MOSSES IN WELLS OF BIJELJINA MUNICIPALITY IN BOSNIA AND HERZEGOVINA
Vertical distribution of species and infraspecies taxa of diatoms (Bacillariophyta) on well mosses where they live epiphytically, and a relative number of individuals per surface area unit were followed in 8 open wells with shadoof. Researches were conducted during 2015-2016 through four seasons. Sampling of algae material from well mosses that cov...
By Milenko Ćurčić, Dragica Milinković, Dragana Radivojević, Dijana Đurić
COENOLOGICAL SIMILARITIES OF DIATOMS IN WELLS AND IN OTHER WATER BIOTOPES IN BOSNIA AND HERZEGOVINA
The research and determination of diatoms (Bacillariophyta) have been carried out in the area of Semberija (Bosnia and Herzegovina) in several locations, which included 35 open shadoof wells incurred by the anthropogenic activity many decades ago, and they represent artificial fresh water ecosystems. The algological material has been collected from...
By Milenko Ćurčić, Dragica Milinković, Olivera Petrović-Tomanić, Dijana Đurić
A NEW MODEL FOR PRODUCED WATER TREATMENT IN ELEMIR OIL FIELD
The oil reservoirs of the southeastern part of the Panonian basin are characterized by considerable presence of water,i.e.waterdrive. The hydrocarbon reservoirs are mostly in the middle and final production stages. The water production is especially significant in wells producing with an installed Electrical Submersible Pump (ESP). As production co...
By Slavko Nesic, Vladimir Mitrovic, Zvonimir Boškovic, Adnan Hodzic
STRESS CHANGES IN CEMENTED BOREHOLE ANNULUS
Cemented boreholes annulus its stability achieved tightness must be maintained in the continuation phase of drilling, is that in the process of drilling, cementing, production. Preserving stability in the working life of the wells threatened and technological stage of the production process due to the natural development of conditioned stress-laden...
By Zvonimir Bošković, Vladimir Čebašek
PROBLEMS OF HERMETICALITY OF WELLS FOR LEACHING IN “TETIMA” MASSIF AND REPAIRING CONSTRUCTION IN CASE OF UNHERMETICAL COLUMN PIPES 9 5 /8"
As it is known, the extraction of rock salt from deposit “Tetima”, Majevica, performed is by controlled leaching in the underground chambers positioned diply in the salt deposit. The connection between the underground chamber, that represents the basic production unit in the primary salt production and technological installations on the surface, is...
By Almir Šabović, Sanel Nuhanović, Adnan Hodžić, Adnan Nalić
SELECTION CASING MATERIAL DEPENDING OF WELLS FLUID CORROSIVITY
World production of pipes is mainly based on the standards of API. However, this does not obligate you to use exclusively for casing manufactured by API standards. The wells that will exploit the hydrocarbons and aggressive media, install the protective casing made of alloy steel not yet covered by API standards. Running casing operation holds a sp...
By Zvonimir Bošković, Vladimir Čebašek, Sanel Nuhanović
APLICATION OF LOCAL CEMENT FOR CEMENTING OIL WELLS IN THE SOUTH EASTERN REGION OF THE PANNONIAN BASIN
Wells conditions are different in wide range of temperature and depth. Cement slurries in such conditions have to remain pumpable and after setting to stay homogenous in production well life. For cementing operations in wide range of temperature and pressure and to accommodate cement slurries for individual well requirements more than 50 additives ...
By Zvonimir Bošković, Vladimir Čebašek, Nebojša Gojković