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What are areas and blocks?

Areas and Blocks

For the purposes of categorizing the location of wells within the Gulf of Mexico, the body of water is divided into Areas and Blocks.  Areas refer to large, asymmetric regions of the Gulf, determined by the underlying geography.  Blocks are (as much as possible) rectangular sub-sections of each area.  They do not cross area lines and are numbered for the purposes of easy identification.

How it’s important to us

When working with assets in the Gulf, wells and prospects are almost universally referred to with an area and block prefix.  Offshore leases (at least federal ones) typically map one-to-one with blocks as well.  So when someone refers to “Ship Shoal 135 #6,” this is what they are referencing.  Here is a good map to give an idea of what the area and block breakdown in the Gulf looks like.


Nate Richards
Nate has over 18 years of software engineering and consulting experience. He founded Entrance in 2003. Nate is the past President of the Board of LifeHouse Houston, a Christ-centered maternity home ministry, and is past Executive committee member and Treasurer of Houston Achievement Place, a foster care and social skills training non-profit organization.
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