Contamination is that the presence of a constituent, impurity, or another undesirable component that spoils, corrupts, infects, makes unfit, or makes inferior a cloth, shape, natural atmosphere, workplace, etc.
Contamination of cutting and core samples, particularly from oil-based lubricator and lubricator additive, is commonly recognized in whole extract and saturate fraction gas chromatograms. An example, in Fig. 3.25, shows the distinctive pattern for Novaplus, associate degree olefin-based artificial lubricator base oil in an exceedingly supply rock extract. The characteristic clusters of olefin peaks around C16 and C18 dominate the recording even at contamination levels of regarding 1–2% by volume. different contamination like diesel, grease pencil, and processed asphalt mud additives generally stand out from the bitumen indigenous to the supply rock. to help within the recognition of contamination from oil-based lubricator and lubricator additive, get the mud report for the well listing the sort of mud and every one additives used. Reference gas chromatograms ar usually offered from the manufacturer for comparison. As mentioned earlier within the section on sample assortment, lubricator and dust additive sample ought to be assortment throughout the drilling of the well. These samples may also be used as reference materials to assist acknowledge potential contamination.
Contaminants within the atmosphere will look and smell pretty nasty, however their impacts transcend simply aesthetics. Some pollutants resist breakdown and accumulate within the organic phenomenon. These pollutants are often consumed or absorbed by fish and life, that successively is also eaten up by US. Chemicals may also get into sediments, impacting massive coastal areas, threatening human health, and reducing the economic well being of regions that rely on a healthy coastal atmosphere.