When asked about frac kill studies, Virginia Wornstaff, offered some words of wisdom from her extensive experience. During frac operations, frac studies are often run for the duration – often a 48 hour test. Regularly, the waters are in the reservoir for a lot longer when taking into consideration the time before load waters are fully recovered. Also, the time between frac and production facility tie in can take weeks or even months. Based on this, the selected biocide may be challenged to maintain control. When working with clients who get random well souring in fields with consistent frac programs and treatments, we often see the difference is in the time between frac and production activities. This extension of time creates a little incubator full of warm, stagnant, nutrient-rich conditions. Now in charge of disrupting this reservoir Petri dish, the treatment program should be adjusted to compensate for the new performance demand. Completing a three-week study or a re-inoculation procedure allows for measurement of residual biocide effects after extended periods of time. With a goal of preventing long-term contamination of the reservoir, wellhead testing 30 days after your well comes on production is going to give you the best indication of success.
Virginia Wornstaff, Vice President