Blar i NIVA-rapporter på emneord "drilling"
Viser treff 1-11 av 11
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Bioavailability of metals in weight materials for drilling muds
(NIVA-rapport;4597, Research report, 2002)Bioaccumulation of metals from various weight materials used in drilling muds was determined after 28 days exposure of polychaetes (Nereis diversicolor) and gastropodes (Hinia (Nassarius) reticulata) to spiked sediments. ... -
Biodegradation of Anco Green Novaplus Drilling Muds on Cuttings Deposited in Benthic Chambers
(NIVA-rapport;3475, Research report, 1996)Discharge of drilling fluids attached to bore hole cuttings may affect the benthic environment on the deposition sites in the North Sea. The effects may vary according to dose and properties of the base fluid and other ... -
Biodegradation of Esters and Olefins in Drilling Mud Deposited on Arctic soft-bottom communities in a low-temperature Mesocosm
(NIVA-rapport;3760, Research report, 1997)Discharge of chemicals from off-shore drilling operations represent a matter of concern for the oil industry and pollution control authorities world-wide. As the industry expands towards higher latitudes and greater depths, ... -
Biodegradation of Ultidril Base Fluid and Drilling Mud on Cuttings Deposited in Benthic Chambers
(NIVA-rapport;3321, Research report, 1995)Synthetic drilling fluids have replaced much of the mineral oil previously used in mud systems for offshore drilling operations The cmemicals are entered into the North Sea environment attached to bore hole cuttings, which ... -
Biologisk testing av boreslam - Reindalspasset - 1, Svalbard
(NIVA-rapport;2593, Research report, 1991)En prøve av boreslam og en prøve av væskefase fra sump, Rendalspasset - 1, brønn nr. 7816/12 - 1, Svalbard er testet m.h.t. biologisk nedbrytbarhet og toksisitet overfor alger (Skeletonema costatum), krepsdyr (Daphnia ... -
Environmental Fate of Synthetic Drilling fluids from Off-shore Drilling Operations - An Experimental Study of an Olefin-, Ether- and Ester-Based Mud System on Cuttings Deposited in Benthic Chambers
(NIVA-rapport;3429, Research report, 1996)Synthetic drilling fluids have replaced much of the mineral oil previously used in mud systems for off-shore drilling operations. The chemicals are entered into the North Sea environment attached to bore hole cuttings, ... -
Environmental impacts of water based drilling mud - a pilot study
(NIVA-rapport;4946, Research report, 2005)A pilot test on waterbased drilling mud has been performed at NIVAs Marine Research Station at Solbergstrand. 15 cores with different thickness of drill cuttings were incubated for a period of 25 days, during which O2 ... -
Evaluation of Overall Marine Impact of the Novadril Mud Systems
(NIVA-rapport;3260, Research report, 1995)The recent increase of discharges of synthetic drilling fluids from offshore drilling operations have caused environmental concern with regard to possible effects on benthic ecosystems. The present report is a review of ... -
Test on Degradation of AQUAMUL BII Drill Mud on Cuttings under Simulated Seabed Conditions
(NIVA-rapport;3092, Research report, 1994)New, synthetic drilling fluids are exploited by the oil industry to replace mineral oil in muds for North Sea drilling operations. Aquamul BII, which is a modification of the previously tested Aquamul B, is a high purity ... -
Testing av potensiell nedbrytbarhet av borevæsker, boreslam og kaks
(NIVA-rapport;1691, Research report, 1984)En oksygenopptakstest ble benyttet til vurdering av nedbrytbarheten av oljebasert boreslam. De fleste slam kom i kategorien "langsomt nedbrytbare". Analysetekniske vanskeligheter med bestemmelse av testkonsentrasjonen av ... -
The effect of treated drill cuttings on benthic recruitment and community stucture-an experimental study on a natural seabed
(NIVA-rapport;2926, Research report, 1993)Environmental effects of treated cuttings were experimentally in situ. The cuttings orginated from drilling with a low toxicity oil based mud. The base oil and aromatic content in the orginal test materiale were 0-20% and ...