A sill is rock that has intruded between older layers of sedimentary rock. The sill does not cut across pre-existing rocks in contrast to dikes, which do cut across older rocks. Sills are always parallel to layers of the surrounding rock. Usually they are in a horizontal orientation, although tectonic processes can cause rotation of …
This is the cable that is towed directly behind a survey vessel (2D, 3D). The cable is the listening device and registered signals are fed through the cables and routed to the instrument room of the vessel, where the signals are converted and stored on data tapes for further analyses. A cable towed behind the …
This is a complex, high technology activity that has its roots in the seismic characteristics of the Earth. Seismology, as practiced commercially in the search for hydrocarbons, is a large and in places very complex subject. The field activity is conducted by advanced survey vessels with typical size of approximately 300ft (5-6000 gross tons), equipped …
Semisubmersible rigs are the most common type of offshore drilling rigs, combining the advantages of submersible rigs with the ability to drill in deep water. Semisubmersible rigs work on the same principle as submersible rigs; through the ‘inflating’ and ‘deflating’ of its lower hull. The main difference with a semisubmersible rig, however, is that when …
Company that has purchased certain quantities of natural gas. The entity that enters into a contract with the pipeline licensee for the transmission of the gas. The shipper has the responsibility to ensure that the quantity of gas nominated is the quantity of gas delivered. Shippers buy gas from producers, sell to suppliers and employ …
Continue reading “Shippers; Distribution shipper; Marketer (of natural gas)”
IEC Rutenberg A (installed capacity of 2 x 575 MW) & B (installed capacity of 2 x 550 MW) coal fired power station located in Ashkelon. The Rutenberg coal power station in Ashkelon requires 330 thousand liters of sea water per hour when it is working on full capacity. Thus, when such a station is …
The principle of a sacrificial anode is in connecting an external anode to the material to be protected from corrosion (such as a subsea pipeline) and passing of an electrical DC current so that the whole area of the metal surface becomes cathodic and therefore does not corrode. The anode electrolytically decomposes while the object …
A weak spot which is sometimes intentionally put in the drillstring so that if pressure exceeds a predetermined amount, the safety joint will break off and the rest of the drillstring can be saved.
A purchasing deal whereby a private producer of electrical energy sells all or part of it to the holder of a transmission license, according to the conditions in these regulations and the appropriate production plan, whose format is determined by the Authority (non dispatchable)
Related to the processes associated with the presence of significance thickness of rock salt within a sequence of rocks. This is due to the fact that salt is mechanically weak and flows like a fluid. Salt is also relatively incompressible. Because salt is weak, its tectonism is closely tied to regional deformation
