ULTIMO AGGIORNAMENTO BANCA DATI: 07/11/2025 14:33:35
Gene banking is arguably the best method available to prevent the loss of genetic diversity caused by declines in wild populations, when the causes of decline cannot be halted or reversed. For one of the most impacted vertebrate groups, the amphibians, gene banking technologies have advanced considerably, ...
Conservation management of wild fish may include fish health management in sympatric populations of domesticated fish in aquaculture. We developed a mathematical model for the population dynamics of parasitic sea lice (Lepeophtheirus salmonis) on domesticated populations of Atlantic salmon (Salmo salar) ...
Intestinal bacterial communities in aquaculture have been drawn to attention due to potential benefit to their hosts. To identify core intestinal bacteria in the black tiger shrimp (Penaeus monodon), bacterial populations of disease-free shrimp were characterized from intestines of four developmental ...
Parts of coral reefs from New Caledonia (South Pacific) were registered at the UNESCO World Heritage list in 2008. Management strategies aiming at preserving the exceptional ecological value of these reefs in the context of climate change are currently being considered. This study evaluates the appropriateness ...
JPT Forum articles are limited to 1,500 words (including 250 per table or figure) or a maximum of two pages. Forum articles may present preliminary results or conclusions from continuing investigations or may impart general technical information that does not require publication as a full-length paper. ...
Introduction Fishing usually is needed when least expected and brings a sudden halt tooperations, especially if the drillstring becomes stuck. Reaction planningbegins at this time unless the drilling project was planned properly from theoutset. That reaction planning is not good and should not be done ...
Summary Good well- and reservoir-management practices demand that new gas wells be tested to expected potentials at the onset of production and buildup surveys be conducted at specified intervals during the life of the well. This will help to determine the deliverability of the wells, obtain base reservoir ...
Abstract The use of coil tubing in fishing operations has been limited to date. This paper discusses a coil tubing fishing operation on a 4000 m, 30% H2S gas well with 27 MPa surface pressure. A 12.5 metre wireline tool string was stuck inside the production tubing at 1770 m, with 76 m of elemental ...
Abstract The RasGas Company Limited (RasGas) North Field wells are typically completed with a sail angle of up to 70o. The field is developed with both 7-in. monobore and 9-5/8-in. optimized big-bore (OBB) wells designed to handle produced gas containing H2S and CO2, and HCl acid stimulation respectively. ...
Summary Maintaining well integrity for field life-cycle operations is a major factor that must be taken into account in the planning and execution of all well-engineering activities. Some legacy wells are not properly abandoned to prevent the contamination of secondary reservoirs or groundwater from ...
Abstract Proposals to construct multiple offshore liquefied natural gas terminals (LNG) in the United States that planned to use seawater as a heat source for vaporization of LNG have prompted assessments of the potential for entrainment of marine organisms in seawater intakes to impact fisheries. ...
Summary This paper describes a real-time, fiber-optic downhole video (DHV) system and its use as a diagnostic tool in solving production problems in Prudhoe Bay wells. Recent developments in lens preparation technology and advancements in the application of electro-fiber-optic cable have proved the ...
Summary Concurrent drilling and production operations on offshore platforms increase the potential for blowouts and subsequent fires. platforms increase the potential for blowouts and subsequent fires. Present wellhead and Christmas tree designs address the potential Present wellhead and Christmas ...
Summary Norman Augustine, CEO of Martin Marietta, in his book Augustine's Laws,1 observed that, ""Cost estimating is the first professional activity to make practical use of the mathematics of a complex number. It is easy to see the imaginary component in these estimations. The difficulty is in finding ...
Drillstring failures can be prevented by drilling a straight, useful hole free of severe doglegs with larger-than-normal drillstring components. The maximum drill-collar diameters shown in the Lubinski tables in the IADC Drilling Manual, Sec. P1,1 for straight-hole drilling are essential for drilling ...
Summary. This paper discusses the constructive use of resonant power transmission down the axial length of a stuck oilfield tubular for the purpose of extracting the tubular from inadvertent (e.g., stuck drillpipe or tubing) or purposeful (e.g., gravel-packed liners) confinement. Resonant and nonresonant ...
Summary Since the passage of the Natl. Environmental Protection Act in 1970, the oil and gas industry has made tremendous progress in developing techniques, procedures, and less toxic materials for the protection of human health and the environment. The toxicity of drilling fluids and their disposal ...
Summary Tropical wetlands and the presence of indigenous people with an ancient culture and a strong economic dependence on natural resources made the Pedernales field an environmental and socially sensitive location. BP's challenge was to work in this area without disrupting the lives of nearby settlements ...
Abstract We introduce an integrated technology for testing and controlling of high efficiency sub-divided zonal water injection in Daqing oilfield. The Oilfield is a heterogeneous multi-layer giant continental sandstone oilfield. After long-terms of water flooding, 95% of main pay zones have been ...
Abstract We analyzed moose tissue samples for extractable petroleum hydrocarbons (EPH), heavy metals and polycyclic hydrocarbons (PAH) and compared levels of concentration in tissues between two areas with noticeably different levels of oil and gas activity. Our treatment are (extensive oil and gas ...