05.07.2009
An event or appearance of seismic data such as a reflection, a refraction a diffraction or other similar feature or the time at which seismic data appear
This terminal is the end of the pipeline. Similar to the departure terminal it has a scraper receiver, inlet and outlet valves, and flowmeter and communication subsystems
A group of hydrocarbon fractions that form the basis of most organic chemicals so far synthesized. The name aromatics is derived from their rather pleasant odor. The unique ring structure of their carbon atoms makes it possible to transform aromatics into an almost endless number of chemicals
Aromatic hydrocarbons (BTEX & PAH) are usually present in natural gas to some degree. BTEX – Benzene, Toluene, Ethyl Benzene and Xylene are aromatic compounds usually present in natural gas streams in small quantities.
These quantities are not usually so high that they affect the gas specification or that recovery of them is commercially viable. The significance of these components is that they have a high level of solubility in water and often form a contaminant that may require removal from produced water streams.
Poly-Aromatic Hydrocarbon (PAH) components are higher non-volatile aromatic hydrocarbons that consist of more than one aromatic ring. These are usually present in minute quantities in natural gas and as with BTEX components the problem lies with their solubility in produced water. These components can also be removed from produced water by polymer adsorbents, or alternatively disposed of using biological treatment (although due to large equipment this technology is not applied offshore).
A raw, coarse-grained sandstone, deposited very near the rocks that create its sediments. Arkose consists of quartz along with a significant proportion of feldspar, a mineral that usually degrades quickly into clay. Its mineral grains are generally angular rather than smooth and rounded, a sign that they were transported only a short distance from their origin