... additional CAPEX. A series of laboratory experiments were conducted among various chemical coagulants, and PAC (Poly Aluminum chloride) was selected on the basis of effectiveness and operational feasibility. PAC works by coagulation of effluent particles present in waste water. Efficiency of the process...

... and complex ecosystems. Their feeding is based on filtration of particles and plankton. According to OSPAR Recommendation 2010/9, protection and restoration of coral gardens is demanded for in the OSPAR Maritime Area. Coral gardens are defined as a relatively dense aggregation of colonies or individuals...

... away from the defined sand-eel area. 2) Use of particle free drilling fluid for minimizing spreading of particles. As a consequence barite is not included in the drilling mud composition. Barite contains high amounts of Ba and may generate particles with a potential of being transported over...

... is carried out by comparing the actual depositions of barite on the sea floor. In addition, turbidity recordings close to the sea floor are compared with simulated concentrations of particle matter at the locations of the turbidity recordings. Good correspondence is obtained between model results...

... best practice and innovative thinking provided we remember the lessons to be learnt and progress over the last century ( IAEA 2008 ). particle iaea operation exposure radium assessment natural gas disposal radionuclide upstream oil & gas radon uranium radiation contamination...

... indicate changes in settling velocity distribution. The flow loop consists of a series of increasing larger clear vertical tubes where smaller particles carry over to larger lower velocity columns. An initial experiment with inert solids plus three different shale cuttings were tested. The concentration...

... or possibly formed during hot work. Subsequently, the air levels of these compounds are monitored and effects of control measures are evaluated. The selected instruments included direct reading instruments for the following contaminants: Inorganic gases (NO x ) Mercury Particle mass (size...

... drilling fluid chemistry drilling fluid property Upstream Oil & Gas calculation species sensitivity distribution Discharge particle evaluation nontoxic stressor stressor sediment risk and uncertainty assessment drilling fluid formulation concentration exposure environmental risk marine...

... operation represented an excellent case study where the output of the model in term of risk for particles and chemicals can be tested towards field observations. Sea floor observations were performed before, during and after drilling operation in order to evaluate the extent of the cuttings deposition...

... predictions of cuttings accumulations from deepwater drilling discharges. drilling fluid property cutting Thickness current speed drilling fluid chemistry drilling fluids and materials modeling particle TPH concentration drilling fluid selection and formulation drilling fluid formulation...

... environmental baseline survey particle Introduction Abstract This paper describes the technical methods used during three deep offshore environmental surveys performed off Angola, Nigeria and Congo. The logistical means such as the choice of vessel, crane type, winch speed and cable length, adequate...

... characteristics and phenomenon that occur in a blowout event: climb of the two-phase mixture (gas and oil) from the reservoir to wellhead and simulation of fluid-dynamic aspects; atomisation and droplet size distribution of oil particles emitted in the atmosphere from wellhead; not ignited jet...

... & gas png lwd tool spe 73896 drilling tool particle neutron comprehensive risk analysis radiation operation exposure radioactive source bha log analysis gamma ray well logging shield safety americium radiation source contamination risk analysis Introduction Radioactive...

.... deposition assessment calculation drilling fluid property particle risk assessment johnsen risk management spe 73854 discharge toxicity data drilling fluid selection and formulation statoil environmental risk drilling fluid formulation barite drilling fluid chemistry north sea water column...

... & gas chemical spill water column coefficient particle simulation dispersion coefficient surface slick assessment model technical spe 73856 spe 73856 Introduction The potential for environmental impact from produced water discharges to the North Sea has received increased attention over...

.... upstream oil & gas alkane uptake dispersion pac spe 61135 oil dispersion sum pac day 0 water management hydrocarbon organism concentration particle tank produced water discharge naphthalene alkylation chemical spill molecular pac oil droplet wsf exposure Introduction Mean...

... operational needs. discharge new generation experiment marine environment spe 61263 plume offshore discharge risk assessment programme sabeur upstream oil & gas contaminant assessment spe 61263 concentration database configuration particle prediction dispersion Introduction...

... The success of the pilot unit led for Akzo to further introduction of the MPPE technology to other industrial applications. Some examples of pilot scale field tests are presented in table 1 . MPPE technology The MPPE particles A scanning electron microscopic (SEM) photograph...

... monitoring / does limits Radiation waste disposal Recommended training & licenses Rules and legislation samy marei contamination individual working particle gamma ray hazard upstream oil & gas proton radioactivity container decay nucleus personnel radiation sickness...

... toxic compound particle calculation concentration level chemistry equation spe 46862 concentration field simulation north sea naphthalene coefficient Introduction The vertical diffusion coefficient above the pycnocline layer is related to the wind velocity Wind ( Thorpe, 1984...