URF: Well Types
|Water well at average depth (typically less than 50 m), which is significantly more shallow than that for oil and gas development.|
|Coalbed methane wells are generally between 250 and 500 m in depth.|
Typically, the formations being targeted with horizontal multistage fracturing are between 650 and 3500 metres below ground. The well on the left is being hydraulically fractured and the well on the right is producing gas.
|A fracture fluid disposal well injects produced fluid into a geological formation far below any underground aquifer.|
|Horizontal multistage fracture. Fracturing is a common practice that enables the release of gas from the rock formation by using fluid to ‘fracture’ the formation, allowing gas to flow more freely to the wellbore.|
|Well casing composed of steel and specialized cement ensures that fluids are kept within the casing to protect aquifers.|