Bakken & Eagle Ford Shale Oil Facts:

Some of the facts about the recent oil boom in United States of America:

Just recently oil and gas energy companies have found billions of barrels of untapped US oil. This oil lies underground in shale rock formation stretching across western North Dakota, northeast Montana and into Canada’s Saskatchewan province known as the Bakken.

Also found huge deposits from Eagle Ford Shale formation in southern Texas. 90 miles south of San Antonio, nine fields making up the majority of the eagle ford yielded 664,088 barrels of crude oil a day in august 2013. These fields yielded 446,372 barrels a day in august 2012. This is an increase of 49%.

The port of Corpus Christi, to which much of Eagle Ford Vrude is shipped by pipeline moved out 367,535 barrels of oil a day in August, up 91% from the same month in 2012. The Louisiana offshore oil port, the largest waterborne petroleum import terminal in the US, received 139,953 barrels of oil a day from Texas in July 2013. The US energy information Administration Productivity Report says that combined all shale reserves produced 3.6 million barrels of oil in October per day. By November, that should increase to 3.7 mbpd (million barrels per day).

Facts about Shale Rock

Shale is the most abundant sedimentary rock and is found in sedimentary basins worldwide. Some shales have special properties that make them important resources. Black shales contain organic material that breaks down to form natural gas and/or oil. Shales are the source rock for world’s most important oil and natural gas deposits. These types of oil and gas deposits are known as conventional reservoirs because the fluids can easily flow through the pores of the rock and into the extraction wells.

Hydraulic Fracturing & Hydro Fracking

In late 1990s drilling companies developed new methods for liberating oil and natural gas that is trapped within the tiny pores spaces of shale. This discovery unlocked some of the largest oil and natural gas deposits in the world. Pore spaces in shale are so tiny that the gas has difficulty moving through the shale and into the well. Drillers discovered that they could increase the permeability of the shale by pumping water down the well under pressure that was high enough to fracture the shale. These fractures liberated the gas from the pore spaces and allowed that gas to flow through the well. This technique is known as hydraulic fracturing.

When density of a liquid is divided by density of water at the temperature, it becomes specific gravity of that liquid.

Also known as “hydro fracking” drillers also learned how to drill down to the level of the shale and turn 90 degrees to drill horizontally through the shale rock unit. This produced a well with a very long pay zone through the reservoir rock. This method is known as “horizontal drilling”.