Oil and gas in Pennsylvania

Аннотация

Improvements in directional drilling and hydraulic fracturing have helped to make it economically desirable to produce oil and gas from deeper formations. Now shale gas fields are being developed at great depths across much of Pennsylvania, even within areas already producing from shallow reservoirs. The sketch (not to scale) illustrates a modern rig (left) drilling to a shale layer, which is far below the rock units shown. On a nearby hill, a pump jack produces oil from a shallow structural trap.