Assessment of Forced Evaporation as a Solution for Onsite Produced Water
Management
Abstract
As a net water production entity where unconventional oil and gas
extraction operations generate volumes of hypersaline water (known as
produced water, PW) greater than they consume, it is imperative to
consider what options are available for this new source of water to
displace water demand on the nations already struggling water supplies.
The increased awareness of the adverse environmental impacts associated
with underground injection is expected to drive PW management away from
underground disposal. Meanwhile, the lack of data on the chemical
constituents and the toxicological characteristics of treated PW has
likely hampered regulatory agencies in developing policies that enable
advanced PW treatment for reuse. Therefore, until a PW reuse market
emerges to justify the costs of advanced treatment, the most viable PW
management strategy for operators is to reduce the volume of PW for
disposal. This study examines the cost and environmental benefits of
adopting on-site thermal evaporation process through data collected from
multiple developmental basins – the Rockies, Appalachia, and
Haynesville basins using thermal evaporators. We developed a method for
assessing the cost benefit and applied to a hypothetical scenario for
Eagle Ford shale to demonstrate the potential benefits of thermal
evaporation. The challenges and limitations are also discussed in this
paper.