Request An Evaluation Today»

EnviroTech Journal

Check out all the latest industry tips and tricks coming straight to you from
the experts at EnviroTech Services.

How Do You Control Clay Swell and Fine Migration?

Posted by Maren Garcia on 9.3.2020


EnviroTech Services, Inc.'s number one priority is to provide products that ensure the longevity of our environment in order to protect our community now and for generations to come. The process of hydraulic fracturing comes with many risks, including clay swell and fine migration.

Water-based drilling fluids allow clay platelets to swell and migrates the fluid as it flows back into the wellbore, causing clay swelling and fine migration. These issues can cause substantial structural damage and adverse effects on drilling operations. In order to address these problems, a drilling fluid must retain clay platelets in position by controlling the charge and electrolytic characteristics of the treatment, abide by environmental guidelines, and remain cost effective.

Combined with fracking fluids, PerfSaver by EnviroTech Services Inc, helps maintain the integrity of your fracture networks when water-swelling clays are present to ensure the effectiveness of hydraulic fluid treatments.

The Capillary Suction Time (CST) Test was developed at the Water Pollution Research Laboratory in Stevenage, England and is a widely used method for characterizing fluid filterability and the condition of colloidal materials in various applications. PerfSavers results from the CST test demonstrates strong performance compared to popular alternatives.

Average CST

A Linear Swell Meter Test was also conducted on PerfSaver and competing products. This test examines the tendency for a shale to absorb liquid from water-based fluids. This leads to swelling of the shales and often causes lower productions and swollen cuttings. A laboratory using the linear swell meter can determine the amount of fluid absorbed by shale over time.

Perctenage of linear swell

The Capillary Suction Time (CST) Test and the Linear Swell Meter Test were conducted by a third party; Intertek Group based in Houston, Texas, to ensure accurate and unbiased results. The tests conducted on PerfSaver show the product's benefits and high-performance ability compared to alternatives. PerfSaver maximizes your hydraulic fracking investment by reducing costs, minimizing clay swell and migration, maximizing production of oil and gas, and lower risk of well impairment.

Learn more about how EnviroTech Services can serve you by visiting our website or request a FREE site evaluation




Work Cited 

Anderson, R.L., et al. “Clay Swelling - A Challenge in the Oilfield.” Earth-Science Reviews, Elsevier, 19 Nov. 2009, www.sciencedirect.com/science/article/abs/pii/S0012825209001780.

“Capillary Suction Timer.” OFI Testing Equipment, Inc., www.ofite.com/products/wastewater/product/2117-capillary-suction-timer.

Topics: Mining Services, Oil & Gas, Compact & Cap