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Comparison of chemical-use between hydraulic fracturing, acidizing, and routine oil and gas development

Fig 1

Venn diagram showing number of chemicals used in oil and gas production.

The first number represents chemicals with CASRN and the number in parentheses represents the total number of reported chemicals. Does not include base fluids. Acidizing includes matrix acidizing, acidizing, and maintenance acidizing.

Fig 1

doi: https://doi.org/10.1371/journal.pone.0175344.g001