Steam-Assisted Gravity Drainage (SAGD) Definition
What Is Steam-Assisted Gravity Drainage (SAGD)? Steam-assisted gravity drainage (SAGD) is a drilling technique used to extract heavy crude oil which is buried too deep or otherwise burdensome to access. Its location makes it economically inefficient to mine using traditional methods. There are several variations of the SAGD process, but Butler, McNab, and Lo developed the