This mod provides you with an alternative way of mining any kinds of ores without the ore patch. Of course this entails certain drawbacks, such as longer mining and crafting times. But if you're located in an area that has very few resources, then this is the only way for you to get them at all.
On the other hand, it allows you to choose the type of ore you want to mine, including oil. In the latter case, this quarry will work even faster than the depleted oil well.