Are the chemicals TTI uses safe?

We use chemicals that have a comparable hazard rating to other chemicals commonly used in oilfield operations such as scale inhibitors, biocides and emulsion breakers. Integral secondary containment for chemicals is provided with the delivery system.

A hazard communication and mitigation plan is provided to our customers so the safe use of BioEOR chemicals is fully understood. This includes safety data sheets, safe handling instructions, and cleanup and spill instructions in case of an accidental release.

Chemicals are greatly diluted and highly unlikely to react with one another, other compounds found in reservoir, fluids or reservoir rock. Treatment has no impact on the characteristics of injection water pumped and flow-lined during routine operations.

Aren’t there potential negative effects BioEOR can cause in a reservoir?

In older “MEOR” treatments, molasses or other sugars were used to stimulate the biological community. This resulted in explosive population growth and the blockage of many reservoirs. BioEOR does not change the food source for bacteria living in the reservoir so, while some growth is expected, there is not enough growth to cause blockage. Additionally, bacteria is not injected during the BioEOR process, so at no point is there a risk of blocking the reservoir. BioEOR works with the bacteria that already live in each reservoir's specific environment.

If there is a risk of souring or acids because a reservoir’s biological community is dominated by sulfur-reducing bacteria (SRB) or if a large amount of sulfate is present in the reservoir, the site is not a candidate for BioEOR treatment. Souring is caused by sulfate and (SRB) that compete with methane generators.

Acid-producing bacteria are present when BioEOR stimulates the production of methane. However, the acids these bacteria produce are consumed by other stimulated bacteria, resulting in no change in produced organic acids that could cause corrosion.

What is involved in the installation and maintenance of the BioEOR equipment and chemicals? How often do you have to replace the solution?

The delivery system is transported to your site on a single semi. The system is housed in a small, skid-mounted shipping container. The delivery system is electrically powered and ties into your existing electrical system. The treatment chemicals are stored within the delivery system in 256-gallon containers, minimizing space requirements.

The BioEOR solution is pumped in proportion to the size of the waterflood. A typical project requires refilling the tank just a few times per year. Each refill operation takes about one hour.

The BioEOR system uses common oilfield equipment. With routine maintenance, repairs are not needed or infrequent.

It takes between three to six months to know if the process is working. If there is evidence the chemicals are having the desired effect, treatment is typically injected into the waterflood for less than one year. Enhanced production may last for three to four years.

Can your technique be used in tandem with other EOR techniques?

Some techniques such as polymer and/or surfactant treatment may be compatible with BioEOR. Thermal, carbon dioxide gas injection and alkaline treatments are incompatible with BioEOR.

Are there additional products and services in TTI’s R&D pipeline?

We are exploring many EOR opportunities that use biological, chemical and physical approaches to enhance the value of oilfield assets.