Why the application of a decades-old formula to untested shale formations may end up exaggerating the size of crude oil reserves. Much has been made of the technology-driven shale revolution that has ...

Jan Arps is the most influential oilman you've never heard of. In 1945, Arps, then a 33-year-old petroleum engineer for British-American Oil Producing Co., published a formula to predict how much ...

There is a chance you missed an excellent story by Bloomberg News reporter Asjylyn Loder about the inherently unreliable methods energy companies use to measure how much oil they have in the ground.