05.07.2009

A survey run in cased holes to locate the top of the cement in the annulus. Since cement generates a considerable amount of heat when setting, a temperature increase will be found at the level where cement is found behind the casing

A customer or a potential customer of the LSO (of the LNG system operator)

Oil sand is a porous rock layer often a mixture of sand, clay, water and bitumen. Oil sands most often refer to Canada where over 170 million barrels of bitumen are estimated to be in place. It is a sedimentary rocks containing heavy oil that cannot be extracted by conventional petroleum recovery methods. The extraction of oil from tar sands is the world’s most capital-intensive method for extracting oil and is also one of the most environmentally destructive. Transforming the tar/bitumen, which is mixed with sand into petroleum is energy intensive and creates significant carbon emissions. Steam created by burning natural gas separates the semisolid bitumen. Then more natural gas is needed to turn the bitumen into synthetic crude, which can be processed by refineries. Spent water used in oil sands projects is placed in lake-sized tailings ponds, one of which killed hundreds of migrating birds in Canada in 2008. Seepage from the ponds is polluting rivers. Strip mining of the oil sands, the most common method of extraction, has destroyed large swaths of forest.

Lengths of pipe may expand with varying temperatures of the flowing crude oil.

The platform is permanently moored by means of tethers or tendons grouped at each of the structure’s corners. A group of tethers is called a tension leg. As with the Seastar platform, these legs allow for significant side to side movement (up to 20 feet), with little vertical movement. Tension leg platforms can operate as deep as 7,000 feet but are best in water depths less than 5,000 ft because of their tendon design. The TLP is relatively successful at minimizing heave, pitch, and roll. However, the TLP is a relatively shallow draft structure that is expensive and limited to moderate water depths and it is virtually immobile once it has been installed. >

A preliminary permit shall terminate upon the holder’s notifying the Commissioner that he has completed his investigations, such notification to be given within one month after completion of the investigations; upon the Commissioner’s cancelling the permit for non-compliance with a condition imposed upon the holder. > >

Target date for drilling

An operation used to determine temperatures at various depths in the wellbore. It is also used to determine the height of cement behind the casing and to locate the source of water influx into the wellbore