Polymer Services, LLC.
Serving the Oil & Gas Industry Since 1989
On location in Wyoming, February 2012
Serving the Oil & Gas Industry Since 1989
Polymer Services, LLC is a highly specialized company focusing on field application of polymer gel treatments. The purpose of the polymer gel treatment is to reduce excessive water production and increase oil or gas production from wells that produce from water-drive reservoirs. These wells are typically produced from naturally fractured carbonate reservoirs such as dolomites and limestone in mature fields. Successful treatments are also run in certain types of sandstone reservoirs. Other practical applications of polymer gels include the treatment of waterflood injection wells to correct channeling or change the injection profile, to improve the ability of the injected fluids to sweep the producing wells in the field, making the waterflood much more efficient and allowing the operator to recover more oil in a shorter period of time.
Polymer gels are effective for selectively blocking the flow of water to the wellbore, without adversely affecting the ability of oil or gas to flow to the wellbore. This occurs because the polymer has a chemical affinity toward water-wet rock, and is chemically repelled by oil-wet rock. Thus, the polymer tends to absorb to water-wet rock surfaces, and form a stable gel in this area of the reservoir, blocking the flow of water.
Polymer gels are also effective for plugging high permeability streaks or fractures, forcing produced fluids to sweep oil from lower permeability areas of the reservoir. The use of polymer gels often changes the drainage pattern of fluid to the wellbore, plugging large fractures and allowing matrix oil to become mobilized, which had previously been over-run by water coming to the wellbore through fractures and high-permeability streaks.
Polymer gels are also highly-effective in correcting problems in reservoirs affected by high mobility ratios between water, and oil. An unfavorable mobility ratio occurs when a low gravity or heavy crude is present in a water drive reservoir. Because the water is a thinner fluid with a viscosity significantly lower than the viscosity of the oil, the water travels through the reservoir and arrives at the wellbore much faster and more easily than the thick oil, creating a high water-oil ratio and increasing the lifting costs to produce oil. The polymer gel selectively blocks the flow of water, allowing the available bottom-hole pressure to more efficiently push oil to the wellbore. This results in a decrease in the amount of water production and an increase in oil production from the treated well.
Polymer Services, LLC assists the oil operator with the design and implementation of the treatment from start to finish, beginning with screening of the wells and selection of the candidate wells likely to respond most favorably to the treatment process. Because we specialize in the successful application of polymer gel treatments, we have a large base of experience to draw from, having run many treatments in many different types of reservoirs. We will not advise a customer to treat a well which we believe has a slim chance of success, because it will lower our overall success rate, and will reflect poorly on our company and the abilities of our people. Polymer Services, LLC currently uses state of the art equipment to blend, apply and monitor the treatments in the field. We build the equipment in our shop, according to our own specifications. We feel this is a very important factor which sets our company apart from others who attempt to pump the treatments with equipment not designed for this purpose. Because of our equipment design, we are able to get very precise chemical mixtures which cannot be achieved with other types of equipment. We feel that our specially designed equipment contributes greatly to our success rate.
Most polymer gel treatments payout in a matter of months, and continue paying benefits for years. A very good example of this is shown below.
Polymer Process (no sound)
Illustrated by Andrew Oldham of www.crossmanstudios.com