Abstract
<p>The application of self-regulating oil-displacing systems is considered to be a promising trend in the development of physico-chemical EOR methods. Technologies intended to increase conformance predominate. EOR technologies, where heat energy of the formation is used to generate alkaline buffer systems, CO<sub>2</sub> and gels increasing oil displacement and conformance, have wide potentialities. Such methods have been realized in the technologies developed at the Institute of Petroleum Chemistry SB RAS (IPC). Hydrolysis, hydrolytic polycondensation and coagulation in the system carbamide â aluminum salt â surfactant â water is the physico-chemical base for the technologies involving alkaline buffer systems, CO<sub>2</sub> and inorganic gels. To prepare thermoreversible polymer gels one uses change of phase from solution to gel in the system: cellulose ether with a lower critical dissolution point â water. Presented are the results obtained on the application of physico-chemical EOR methods and technologies developed at IPC in oil fields of Russia. The technologies proved to be economically effective and environmentally safe. The period of payback is 5-12 months.</p>
Highlights
In recent decades the share of oil and gas in fuel and energy balance of our country accounts for three fourth of energy consumption - it has converted into oil and gas balance
The major part in these figures falls to the share of oil, oil products and natural gas to give priority to oil and gas industry both in oil and energy complex and in Russian economy as a whole
In Government approved conception of energy policy overcoming of setback in production in oil and gas industry and assurance of further development in these base branches of Russian economy is considered as the primary objective
Summary
In recent decades the share of oil and gas in fuel and energy balance of our country accounts for three fourth of energy consumption - it has converted into oil and gas balance. The major part in these figures falls to the share of oil, oil products and natural gas to give priority to oil and gas industry both in oil and energy complex and in Russian economy as a whole. In Government approved conception of energy policy overcoming of setback in production in oil and gas industry and assurance of further development in these base branches of Russian economy is considered as the primary objective. Progressive growth of difficult to recover reserves, namely unrecovered oil after flooding in the regions, in the development of which great investments have been already made, predetermined great attention to novel EOR methods: physico-chemical, heat and gas. In many respects the reasons for widespread application of chemical methods in Russia is objectively related to the structure of residual oil reserves, a significant part of which is localised in water-flooded oil fields in low permeable reservoirs [1,2,3,4]
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