Natural Gas in The Marcellus Shale
- February 16th, 2011
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All drilling has challenges that directly affect the profitability of the endeavor, but when the production potential is expected to be extremely profitable, companies proceed with the endeavor. Drilling for natural gas is no different in this regard, and can be relatively easy to locate when it is present in Marcellus Shale. It is becoming more popular as well due to newer drilling methods that result in more profits.
In order to understand drilling into Marcellus Shale, it is first important to understand this geological wonder. This black shale layer was first deposited about 400 million years ago in deep water that was very low in oxygen, thus it does not have much in the way of fossilization. Organic matter settled to these depths but did not immediately decompose thereby keeping its organic carbon. This layer is between impermeable limestone layers that have resulted in trapping natural gas as the organic carbon has decayed over millions of years.
What was under deep seas 400 million years ago is now far above as our planet has changed. If these layers were still only reachable by going through miles of water and then miles of ocean floor, they would certainly be of little use to the natural gas driller. Luckily, they are present now under land, and even better they are abundant under an area where natural gas is in high demand – the northeastern part of the United States.
In the United States there is one large deposit of Marcellus Shale that extends from southern New York down through western Pennsylvania, west into Ohio, south into West Virginia, Virginia and a small portion of Maryland. Most of Marcellus Shale is more than a mile down from the surface, although it is at the surface in Marcellus, New York, hence its name. The middle Devonian shale layer in which Marcellus Shale is present extends further – into Kentucky, Tennessee and an extremely small area of Georgia and Alabama.
One concern about natural gas drilling is the projected amount that can be obtained. Early estimates devised from surveys tagged the area as having about 1.9 trillion cubic feet of natural gas. This may sound like a lot but since it was spread over a very large area, the amount in any given acre of land did not excite many drilling companies. However, many did drill anyhow which led to nearly 400 wells between 2005 and 2007. In 2008, new surveys were conducted that surprised the industry – indications were that the number was far higher than the previous 1.9 trillion estimate; perhaps being as much as 50 trillion cubic feet! Some geologists believe it is even much more than that. Even if only 10% of this were actually recoverable, it would mean billions of dollars, perhaps even a trillion dollars! Since some geologists even believe that as much as 30% could be recovered, it is clear why natural gas drilling is increasing in popularity.
In order to understand what makes the natural gas recoverable, one has to consider that natural gas is within the Marcellus Shale in three ways:
1. in the minute openings in the shale
2. within vertical fractures that break through the shale
3. absorbed in organic material and mineral grains
Obviously not all of the natural gas is actually easily removed from the shale. The fractures are the easiest to contend with, so drilling methods must consider the best way to work with fractures. Because the fractures are vertical, vertical drilling does not intersect as well as horizontal drilling. Horizontal drilling also allows drilling to extend far beyond the surface area of the well taking advantage of deposits far beyond the well. Used in conjunction with a process called hydrofracing which uses high-pressure water or a gel to bring on fractures the production rate can be increased dramatically.
The number of Marcellus Shale drilling wells is very much on the rise with the incorporation of these more effectual drilling methods. Companies scramble to obtain mineral rights on properties throughout the region as well as lease land for pipelines. In Pennsylvania alone, the number of wells drilled as exploded in numbers – from just 27 in 2007 to nearly 1,400 in 2010.
The increases also equate to more money for landowners. In the beginning, leases ran about $100 per acre. Now we are seeing numbers ranging from $2,000 to nearly $20,000 per acre depending on the location. Add to that a regular royalty check based on the amount of natural gas produced and it is clear to see why natural gas drilling companies are not running short of eager landowners. Even state agencies are enjoying payments for activity on state lands. At a time when much of this area of the country is experiencing economic distress, this activity may be the shot in the arm that it needs to recover.
I personally spent some time in these small Boon Towns throughout the region and have seen the trucks running up and down the streets all day even all day on Saturdays. Many towns are still fighting against it due to several reasons but from what I see the drilling will go on so I would look for some options plays for the natural gas market.


