Steam Assisted Gravity Drainage (Sagd)
Steam Assisted Gravity Drainage (Sagd) : An thermal oil recover y technology for producing heavy crude oil and bitumen, in which a pair of horizontal wells are drilled into the oil reservoir, one a few meters above the other. Low pressure steam is continuously injected into the upper wellbore to heat the oil and reduce its viscosity, causing the heated oil to drain by gravity into the lower wellbore, where it is pumped to surface by artificial or gas l if t mechanisms
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