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Into the aquifer
They're both different in many ways but similar in some.
Since the first known oil wells were drilled more than 1660 years ago, it might be possible to answer this question with a crew of 100 scientists, with 10 years each of spare time, a load of motivation and a few million Dollars in funding.. :D
A lot
Fracking is when a high pressure solution of water, acids, etc. is injected deep into a drill hole (usually horizontally drilled not vertically drilled) with the intention of causing fracturing of the rock layers around the hole, allowing trapped oil and gas to escape from that rock and collect in the drill hole. This causes a significant increase in well production and in many cases can transform a "worked out" field of dry wells into a valuable actively producing field again. Unfortunately sometimes the fractures enter aquifers polluting the water in wells depending on that aquifer.
Into the aquifer
All 77 counties in Oklahoma have had oil wells drilled in them.
They're both different in many ways but similar in some.
According to the North Dakota Industrial Commission, Department of Mineral Resources, Oil and Gas Division, as of January 2015, there are a total of 12,182 producing oil wells in North Dakota with a total of 13,657 wells capable of producing oil.
Two they say. However, I have yet to find any information on where or progress, or proof for that matter.
Since the first known oil wells were drilled more than 1660 years ago, it might be possible to answer this question with a crew of 100 scientists, with 10 years each of spare time, a load of motivation and a few million Dollars in funding.. :D
A lot
Prior to the BP oil spill, it was considered that the necessary precautions had been taken so there would be no oil spill. This has been proven wrong. The motivation for drilling for oil is to make money. Many oil wells similar to the one that caused the BP spill are drilled around the world. There is very active discussion of the causes with the industry and government, and how to prevent them in the future.
There are about 950000 oil wells in the entire world. Of those, 530000 are located in the US!
That is not always the case. It depends very much on where the well is drilled. I have seen many shallow wells with perfect water.
The Wells Fargo swift code in New jersey is known as WSFS. There are many of Wells Fargo all over the world.
Fracking is when a high pressure solution of water, acids, etc. is injected deep into a drill hole (usually horizontally drilled not vertically drilled) with the intention of causing fracturing of the rock layers around the hole, allowing trapped oil and gas to escape from that rock and collect in the drill hole. This causes a significant increase in well production and in many cases can transform a "worked out" field of dry wells into a valuable actively producing field again. Unfortunately sometimes the fractures enter aquifers polluting the water in wells depending on that aquifer.