Oil & Gas - Water Quality, Well Drilling Map

Laws regulating the well drilling phase primarily focus on the structural strength and integrity of the well bore hole. The major focus is on requirements for the steel pipe casing, which separates the drilled bore hole from the surrounding dirt, and the cementing, which is used to adhere the casing to the formation and to support the casing and prevent drilling fluids from migrating between permeable underground zones. Depending on the depth of the casing, different names are used to differentiate the different pipes used – surface casing, intermediate casing, production casing. A great number of regulations address this stage of oil and gas development to protect fresh-water aquifers for the duration of the well’s life. This dataset captures well-bore integrity standards and verification, types of drilling fluids, cementing requirements, cement-bond logs, mechanical integrity testing, and blowout prevention equipment.

This page displays laws in effect through April 30, 2014. To explore the variation in these laws click the "Start Here" button below. 

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If you have questions, corrections, or additions, please contact Matt Samelson at oilandgasbmps@colorado.edu.

Related Resources

LawAtlas Interactive Maps: 
Water Quality:  Permitting, Design, and Construction
Water Quality:  Well Drilling
Water Quality:  Well Completion
Water Quality:  Production and Operation
Water Quality:  Reclamation
Water Quantity:  Quantity

Did you know?

Laws in 12 of the 13 states examined here require testing to verify that cement casings are complete.

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Map Legend: State Included in research. Not included in research.