Aligning drilling fluid chemical LCA with regulatory standards – challenges and implications for oilfield operations

As oil and gas operations confront growing regulatory demands, the life cycle assessment (LCA) of drilling fluid chemicals has emerged as a key sustainability tool. While global standards such as ISO 14040 and ISO 14044 provide foundational LCA frameworks, inconsistencies in their interpretation across regions introduce complexity and ambiguity in real-world application. This paper explores these discrepancies with a focus on water-based mud systems, assessing how boundary definitions, regional energy mixes, and variable disclosure practices influence calculated environmental impacts. Through a comparative study of differing regional methodologies, the paper illustrates how regulatory divergence can alter procurement and operational decisions.