Definition - What does Relief Well mean?
A Relief Well is a well that is drilled to control the sudden explosion of oil and natural gas. This type of well is generally a secondary well, dug at some distance from the real drilling site. It consists of troubled piping to control the flow of pressurized liquid. The well is drilled in such a way that it intersects with the original well. However, it is important to target the accurate position for Relief wells so as to have successful executions at the hour of need.
Petropedia explains Relief Well
Drilling of Relief Wells is a standard tactic in the oil and gas industry; however, it is a tricky business. Thus, while digging experienced engineers are appointed so as to use specialized simulation software to make careful calculations. The type of drilling used to create Relief Wells is known as directional drilling. The major problem that the drilling team faces while drilling is that the well should intersect at the exact target at a great depth. It pumps specialized liquid along with heavy drilling mud and cement to stop the flow from the damaged well. Relief Wells are useful because they can avoid sand boils.