Browsing by Author "Zajfert, Grzegorz"

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Access status: Open Access ,
Kompleksowe zastosowanie badań morskich do zagospodarowania złoża B8
(2006) Zajfert, Grzegorz; Artymiuk, Jan
Management of oil and gas field B8, located in the NE part of the Polish Economic Zone requires complex marine studies. The perspective area was characterized in view of its shallow geological build, hydrometeorological conditions and present day anthropogenic factors. Investigations and expertises were made for: suspension of a drilling platform Petrobaltic, deposition of the underwater pipeline linking the platform with an overflow buoy, and for anchoring of the overflow-moor buoy CALM. Specific methods of field investigation and their results are presented. The research concentrated on: batimetric depthfinding, establishing the purity of the sea bed on the basis ofsonar images, seismic logging with two different types of devices, drilling of a geological-engineering well, collecting of cores with a VKG-6, determination of geochemical background on the basis of collected sea bed sediments, inspections by underwater vehicles, equipped with TV cameras.
Access status: Open Access ,
Zastosowanie sondowania statycznego w badaniach prowadzonych w PPiEZRiG Petrobaltic S.A.
(2006) Zajfert, Grzegorz
Marine geotechnical investigations should be run for such investments as suspension of the platform, gas pipelines installment, anchoring of overflow-moor buoys to the tanker, and designing hydrotechnical objects. Petrobaltic used a penetrometer Roson 10 T, installed on a ship m/v St. Barbara. The Dutch Penetrometer Roson 10 T A.P. V.d. Berg enables soil analyses in situ. The methods lie in sticking measurement cones into the ground with simultaneous digital recording physical and mechanical parameters of the sediments. The sounder can be also equipped with cones CPT and CPTU, and tester MOSTAP-65 with which undisturbed samples can be collected. Specific parameters and ground properties are registered during the measurement. These parameters enable determination of the geotechnical profile and carrying capacity of the sediments. This device is indispensable for evaluating mechanical properties of grounds whenever intact samples cannot be collected, e.g. from sandy sediments. The paper provides descriptions of research processes, where various difficulties may be encountered. The Author presents his own solutions and experience in preventing failure or measurement errors.