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Types of Oil Wells

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Oil wells come in many varieties. By produced fluid, there can be wells that produce oil, wells that produce oil and natural gas, or wells that only produce natural gas. Natural gas is almost always a by-product of producing oil, since the small, light gas carbon chains come out of solution as it undergoes pressure reduction from the reservoir to the surface. Unwanted natural gas can actually be quite a disposal problem at the well site. If there is not a market for natural gas near the wellhead it is virtually valueless since it must be piped to the end user. Until recently, such unwanted gas was burned off at the wellsite, but due to environmental concerns this practice is becoming less and less common. Often, unwanted (or 'stranded'; gas without a market) gas is pumped back into the reservoir with an 'injection' well for disposal or repressurizing the producing formation. Another solution is to export the natural gas as a liquid. Of course, in locations such as the United States with a high natural gas demand, pipelines are constructed to take the gas from the wellsite to the end consumer.

 

Another obvious way to classify oil wells is by land or offshore wells. There really is very little difference in the well itself; an offshore well simply targets a reservoir that also happens to be underneath an ocean. Also, due to logistics, drilling an offshore well is far more costly than an onshore well. By far the most common type of well is of the onshore variety. Another way to classify oil wells is by their purpose in contributing to the development of a resource. They can be characterized as:

 

At a producing well site, active wells may be further categorized as:




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WORDLIST | FORMATION EVALUATION | Terms and Vocabulary | Drive Mechanisms | WORDLIST | USING OIL | Lead-in | Define the following terms with their similar meaning in Russian. | A. Listen to the description of the drilling process and fill in the missing words (no more than THREE words). The first word is given as an example. | WORDLIST |


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