Author: bomuo

The area surrounding the wellbore that has been harmed by the drilling process, generally due to mud or cement invasion. Near-wellbore damage can significantly affect productivity. A lightly damaged zone around the wellbore can be bypassed by perforation tunnels to create connection conduits from the wellbore to the undamaged reservoir formation.

A request for a physical quantity of gas per day under a specific purchase, sales or transportation agreement

Oil and gas industry has often been termed a cyclical business in that when prices of oil and gas are low, petroleum companies cut their exploration spending thus setting the stage for a new price hike as supplies lag again behind demand. Indeed over the last century O&G production companies have tended to underinvest in periods of falling prices leading to countless up and down cycles. The price collapse of the 1980s led companies to reduce investments and sparked a wave of mega-mergers throughout the sector and then left the world scrambling for oil when demand from Asian and Latin American economies soared during the first decade of the 21st century

The elapsed time for mud to circulate from the suction pit down the wellbore and back to the surface. The cycle time allows the mud engineer to catch “in” and “out” samples that accurately represent the same element of mud in a circulating system

Gas that is compressed and injected back to the reservoir. In gas-condensate reservoirs, after the liquids or condensate are recovered at the surface, the residue gas (dry gas) is returned to the reservoir to maintain pressure. This prevents retrograde condensation which will form unrecoverable liquid hydrocarbons in the reservoir