Increase in oil production by application pseudoplastic hydrophobic polymer system SPA-Well

Fakhretdinov R.N. Fatkullin A.A. Yakimenko G.Kh. Imanbaev B.A. Khavkin A.Ya.
2021 Neftyanoe Khozyaistvo

Neftyanoe Khozyaystvo - Oil Industry
2021 Issue 11 120 - 123 pp.

In recent years, interest in the use of polymer systems to improve the efficiency of oil production has grown significantly, and the intensification of their use has been noted in a number of oil-producing countries, including Brazil, Venezuela, Canada, China, Colombia, the United States, Russia, France. The result of pilot works on the injection of SPA-Well reagent into the injection well of the Zhalgiztobe field, which has an oil viscosity of more than 800 mPa·s, a layered heterogeneous reservoir and a core permeability spread of more than 200 times, are presented. The waters of the Zhalgiztobe field are chlorocalcium brines with mineralization of 35-55 g/l, which significantly reduce the viscosity of the polymer solution relative to the polymer mixing in fresh water. A feature of the SPA-Well reagent is its hydrophobicity, howev-er, allowing it to be used for mxing in injected water. The SPA-Well reagent is actively retained in a porous media, practically without being washed out into production wells, unlike traditional polymers. The results of experimental studies of the reagent solution on the water of the deposit are presented. Ex-periments have shown that the SPA-Well reagent has a viscosity of 30 mPa·s when injected, reaching values of hundreds of thousands of millipas-cal-second in reservoir conditions. Pilot works on the injection of SPA-Well solution at the site of injection well No. 218 in a total volume of 5.3 tons in the form of a fractional rim were carried out on December 11-16, 2019. The technological effect of more than 1300-2200 tons of additional production or 300-400 tons per 1 ton of injected reagent was obtained. In accordance with the mechanism of influence of thickening viscoelastic systems on the process of oil displacement, the technological effect will only increase over time (by increasing the volume of injection of pushing water).

Gel-forming reagent , Polymer-gel SPA-Well technology , Technological efficiency

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Multifunctional Company ChemServiceEngineering LLC, Moscow, Russian Federation
KazNIPImunaygas, Aktau, Kazakhstan
Gubkin University, Moscow, Russian Federation
N.K.Baibakov Innovation Foundation, Moscow, Russian Federation

Multifunctional Company ChemServiceEngineering LLC
KazNIPImunaygas
Gubkin University
N.K.Baibakov Innovation Foundation

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