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Which of the following extraction methods are commonly used to remove natural gas from the earth? Choose 2 answers:

A. In-situ leaching
B. Horizontal drilling and fracking
C. Drilling vertical wells
D. Subsurface mining

Answer :

Final answer:

The two commonly used methods for extracting natural gas are horizontal drilling combined with fracking, and drilling vertical wells. These techniques allow for efficient access to natural gas deposits underground. Other methods listed, like subsurface mining and in-situ leaching, are not typically used for natural gas extraction.


Explanation:

Extraction Methods for Natural Gas


Natural gas is commonly extracted from the earth using several techniques. Among the options provided, the two most prevalent methods are:



  1. Horizontal drilling and fracking: This method involves drilling vertically down to the gas reservoir and then horizontally through the rock layers. After that, hydraulic fracturing (or fracking) is used to create fractures in the rock, facilitating the flow of natural gas to the well.

  2. Drilling vertical wells: This traditional method involves drilling straight down into the gas reservoir. While less complex than horizontal drilling, it is still an effective way of accessing natural gas, particularly in formations that are not suitable for horizontal drilling.


The other methods mentioned, such as in-situ leaching and subsurface mining, are generally not applicable to natural gas extraction but are more relevant to the extraction of minerals or ores.


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