The present study assesses environmental performance of seafood production by demersal trawling in Tunisia Gulf of Gabes in order to analyze the contribution of each production stage to environmental impacts and to understand drivers of the impacts using life cycle assessment LCA. Several ecosystem indicators from EwE were calculated. Demersal trawling in the exploited ecosystem of the Gulf of Gabes southern Tunisia was used as a case study to illustrate the applicability of the approach. Several management plans were simulated and their influence on environmental performance was assessed. Ecospace, the spatial module of EwE, was used to simulate management scenarios: establishment of marine protected areas, extension of the biological rest period, and decrease in the number of demersal trawlers.
Fishing activities can influence the maturity, stability, and complexity of ecosystems on several levels. MTI does not change. Ecospace was used to simulate scenarios over a year period — Therefore, it is necessary to establish adequate management practices to facilitate the recovery of marine resources. Simulated scenarios of coastal MPA establishment have lower environmental impacts than the baseline scenario. Sea bed bottom profile offshore tunisia is a non-resident Tunisian company registered at Zarzis Free Zone. This approach characterises the way operates, bringing together the range of skills required and providing the management to realise the desired result.
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Surfing Vacations. Mediterranean Sea. Introduction Physiographic and geologic features Natural divisions Geology Desiccation theory and profiile deposits Physiography Hydrologic features and climate Hydrology Temperature and water chemistry Climate Economic aspects Biological resources Mineral resources Transportation and tourism Impact of human activity Study and exploration. Groundswell is best for creating good waves. Waves tend to be lumpier and fail to reach their optimum peak. A gently sloping approach causes the bottom of the wave to drag and tuniaia result in the top of the wave prematurely overtaking the bottom resulting in the wave breaking in deeper water. The breaking depth is reached much later that on the gently sloped bottom. Surf Gear. Central America. Sea Sea bed bottom profile offshore tunisia features are especially important when surfing beach breaks. Reef breaks such as Pipeline in Hawaii are examples of this type of break. Wave breaking on sloping sea floor. Wind swell will tend to break in deeper water and will not pack such a punch. Surfboard Advice.
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- As a swell approaches the coastline and comes into contact with the sea floor the waves will start to slow down.
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We use them to give you the best experience. If you continue using our website, we'll assume that you are happy to receive all cookies on this website. INSTALL provides marine geophysical and environmental surveys and technical support services worldwide to companies and organisations operating in any marine or aquatic environment.
Our reference market includes offshore oil and gas, submarine cables, port and coastal, renewable energies, scientific research, marine technologies and other related businesses. INSTALL offers a wide range of technical, operational and scientific support services in the fields of marine sciences and technologies and marine survey engineering.
In recent years, a vast amount of seabed structures and other hardware have been developed and installed offshore, all of which require regular inspection and maintenance. The company has focused its skillsets on offering specialised and cost-contained services.
A range of services are provided within this market, including visual soft applications, light construction work, inspection and remotely operated vehicle ROV operations. The company is equipped to meet the needs of its clients, deploying innovative technology to provide the most appropriate and cost-effective solutions in the offshore environment.
Integration of the least of these technologies and techniques allows the company to offer customers a complete survey solution in even the most complex of scenarios:. A GIS integrates hardware, software and data for capturing, managing, analysing and displaying all forms of geographically-referenced information.
It allows us to view, understand, question, interpret and visualise data in ways that reveal relationships, patterns and trends in the form of maps, globe, reports and charts. A GIS helps you answer questions and solve problems by looking at your data in a way that is quickly understood and easily shared. GIS technology can be integrated into any enterprise information system framework.
Autochart is an AutoCAD extension that automates the production of north-up and alignment sheets for both hydrographic and terrestrial datasets. It helps achieve compressed delivery schedules by creating fully georeferenced multi-paneled charts in a fraction of the time taken by manual drafting techniques. The visual soft suite is modular collection of applications to record, edit, archive, review and report digital video inspection data.
It is designed for any type of video inspection where large volumes of video must be recorded from one or more camera and synchronised with other data resources. The suite of products caters for both structure and pipeline inspection with minimal configuration to change modes. The software has been integrated into most industry standard inspection packages further details are available on request. The key component of video inspection is the initial video encoding, and this has been designed to meet the requirements of all inspection and monitoring tasks.
Automation is a key feature of providing automated file management and distribution, relieving the operator of the burden of manually copying large quantities of video files. The visual soft suite is a world leader in subsea digital inspection systems. It has a proven track record in the offshore inspection survey market since , with more than operational systems worldwide. INSTALL provide a complete solution for digital video capture, playback, processing and reporting of pipeline, structural or other inspection survey data for the offshore oil and gas industry.
INSTALL offers acoustic metrology services as a complete package from procedure study and editing, engineering and operating and operations offshore. Our team is fully trained in the latest generation of the Sonardyne 6G and will give you complete support in all of your operations. It can inspect dams and other vertical structures accurately with position-quality indicators, rapid set-up and calibration in any location in minutes.
It uses any available dam plan, photo or diagram. View whitepaper. Continue Learn More X. Advertise with us. Make an enquiry. Via Domenico Fontana Napoli Italy. Follow this company Follow the company to be always up to date with this company. Products and Services. White Papers. Related Projects. Press Release. Regional Offices.
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Wind swell will tend to break in deeper water and will not pack such a punch. If you're learning how to surf, then these waves are ideally what you are after. Surfing a flat beach can be a boring experience. The Surfboard. As they slow down they have to squash together. Rapid depth change creates steep pitching waves.
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Sea Bed Bottom Profile Offshore Tunisia
The space between: 1 The casing and the wall of the borehole. A well drilled as part of an appraisal drilling program which is carried out to determine the physical extent, reserves and likely production rate of a field. A unit of volume measurement used for petroleum and its products 7.
An acreage sub-division measuring approximately 10 x 20 kms, forming part of a quadrant. When well pressure exceeds the ability of the wellhead valves to control it. Oil and gas "blow wild" at the surface.
Are high pressure wellhead valves, designed to shut off the uncontrolled flow of hydrocarbons. Pipe cemented in the well to seal off formation fluids or keep the hole from caving in.
The steel tubing that lines a well after it has been drilled. It is formed from sections of steel tube screwed together. A range of exploration drilling scenarios from which the following activity levels, based on recent historical experience, are adopted as the central estimates. The assembly of fittings and valves on the top of the casing which control the production rate of oil.
The installation of permanent wellhead equipment for the production of oil and gas. Hydrocarbons which are in the gaseous state under reservoir conditions and which become liquid when temperature or pressure is reduced. A mixture of pentanes and higher hydrocarbons. Taking rock samples from a well by means of a special tool -- a "core barrel". A large barge, capable of lifting heavy equipment onto offshore platforms. Also known as a "derrick barge". Liquid petroleum as it comes out of the ground as distinguished from refined oils manufactured out of it.
Rock chips cut from the formation by the drill bit, and brought to the surface with the mud. Used by geologists to obtain formation data. The phase in which a proven oil or gas field is brought into production by drilling production development wells.
A drilling unit that is not permanently fixed to the seabed, e. Also means the derrick and its associated machinery. Natural gas composed mainly of methane with only minor amounts of ethane, propane and butane and little or no heavier hydrocarbons in the gasoline range.
A process whereby oil is recovered other than by the natural pressure in a reservoir. Drilling carried out to determine whether hydrocarbons are present in a particular area or structure. The phase of operations which covers the search for oil or gas by carrying out detailed geological and geophysical surveys followed up where appropriate by exploratory drilling. When a company acquires an interest in a block by taking over all or part of the financial commitment for drilling an exploration well.
A method of breaking down a formation by pumping fluid at very high pressures. The objective is to increase production rates from a reservoir. The process whereby separated associated gas is pumped back into a reservoir for conservation purposes or to maintain the reservoir pressure. A computer system capable of assembling, storing, manipulating, and displaying geographically referenced information. A compound containing only the elements hydrogen and carbon. May exist as a solid, a liquid or a gas.
The term is mainly used in a catch-all sense for oil, gas and condensate. A well is said to "kick" if the formation pressure exceeds the pressure exerted by the mud column. Oilfield or naturally occurring gas, chiefly methane, liquefied for transportation.
Light hydrocarbon material, gaseous at atmospheric temperature and pressure, held in the liquid state by pressure to facilitate storage, transport and handling. Commercial liquefied gas consists essentially of either propane or butane, or mixtures thereof. The act of setting a packer or retrievable bridge plug above the perforations in a wellbore and applying pressure to the annulus in order to ensure soundness of the casing.
An aperture in the center of a drillship or semi-submersible drilling rig, through which drilling and diving operations can be conducted.
A mixture of base substance and additives used to lubricate the drill bit and to counteract the natural pressure of the formation. Natural gas liquids. Liquid hydrocarbons found in association with natural gas. An estimated measure of the total amount of oil contained in a reservoir, and, as such, a higher figure than the estimated recoverable reserves of oil.
The company that has legal authority to drill wells and undertake the production of hydrocarbons that are found.
The Operator is often part of a consortium and acts on behalf of this consortium. The property of a formation which quantifies the flow of a fluid through the pore spaces and into the wellbore. A generic name for hydrocarbons, including crude oil, natural gas liquids, natural gas and their products. Recovery of oil or gas from a reservoir purely by using the natural pressure in the reservoir to force the oil or gas out.
Those reserves which on the available evidence are virtually certain to be technically and economically producible i. An operation involving any of the following: 1 Deepening from one zone to another zone. The underground formation where oil and gas has accumulated.
It consists of a porous rock to hold the oil or gas, and a cap rock that prevents its escape. Drill crew members who work on the derrick floor, screwing together the sections of drillpipe when running or pulling a drillstring. Drill crew members who handle the loading and unloading of equipment and assist in general operations around the rig. Recovery of oil or gas from a reservoir by artificially maintaining or enhancing the reservoir pressure by injecting gas, water or other substances into the reservoir rock.
A well which is capable of producing but is not presently producing. Reasons for a well being shut in may be lack of equipment, market or other.
A production hiatus during which the platform ceases to produce while essential maintenance work is undertaken. A wellbore segment extending from a wellbore intersection along a wellbore path to a different wellbore bottomhole from any previously existing wellbore bottomholes. The well activity of drilling a new wellbore segment from a wellbore intersection to a new wellbore bottomhole or target.
The act of isolating the completed interval or intervals within a wellbore from the surface by means of a cement retainer, cast iron bridge plug, cement plug, tubing and packer with tubing plug, or any combination thereof.
Second-in-command of a drilling crew under the drilling superintendent. Responsible for the day-to-day running of the rig and for ensuring that all the necessary equipment is available. An applicant must demonstrate that the well has no reasonable chance of adversely affecting the quality of an underground source of drinking water before a permit is issued. A record of geological formation penetrated during drilling, including technical details of the operation.
A well drilled in an unproven area. Also known as an "exploration well". Wildcats were abundant in the locality, and those unlucky enough to be shot were hung from oil derricks.
Remedial work to the equipment within a well, the well pipework, or relating to attempts to increase the rate of flow. Also known as a "wildcat well". Copyright Condensate and gas is produced simultaneously from the outset of production. To increase the distance below a specified reference datum. The tower-like structure that houses most of the drilling controls.
A well which has proved to be non-productive. Abbreviation for exploration and production. A geographical area under which an oil or gas reservoir lies. Retrieving objects from the borehole, such as a broken drillstring, or tools.
The pressure at the bottom of a well when it is shut in at the wellhead. Salt water underlying gas and oil in the formation. The volume of gas at atmospheric pressure produced per unit of oil produced. A well used for pumping water or gas into the reservoir.
The lower section, or "legs", of an offshore platform. A barge that is specially equipped to lay submarine pipelines. Liquefied natural gas LNG. Liquefied petroleum gas LPG. Equivalent to kilos, Gas, occurring naturally and often found in association with crude petroleum. A mixture of liquid hydrocarbons of different molecular weights. A geographic area under which an oil reservoir lies. Rock in which oil and gas are found in exploitable quantities.
An offshore structure that is permanently fixed to the seabed. The percentage of void in a porous rock compared to the solid formation. A pipe between a seabed BOP and a floating drilling rig. The section of pipework that joins a seabed wellhead to the Christmas tree. The cash or kind paid to the owner of mineral rights.