Investigation of the Selectivity of the Water Shutoff Technology

Victor Duryagin, Thang Nguyen Van (), Nikita Onegov and Galiya Shamsutdinova
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Victor Duryagin: Department of Development and Operation of Oil and Gas Fields, Saint Petersburg Mining University, 199106 Saint Petersburg, Russia
Thang Nguyen Van: Department of Development and Operation of Oil and Gas Fields, Saint Petersburg Mining University, 199106 Saint Petersburg, Russia
Nikita Onegov: Department of Development and Operation of Oil and Gas Fields, Saint Petersburg Mining University, 199106 Saint Petersburg, Russia
Galiya Shamsutdinova: Department of Development and Operation of Oil and Gas Fields, Saint Petersburg Mining University, 199106 Saint Petersburg, Russia

Energies, 2022, vol. 16, issue 1, 1-16

Abstract: High water-cut oil production is one of the major issues in the petroleum industry. The present study investigates different profile control solutions, with an emphasis on selective methods and materials that mostly decrease the permeability of water-saturated reservoir areas. To achieve the selective water flow blockage in fractured porous media, the sodium silicate-based gel-forming composition was developed. The test procedure was created to assess selective and strength characteristics of the presented composition. According to the results of this procedure, adding polyatomic alcohols to the mentioned composition enhances its hydrophilic behavior in water-saturated rocks (work of adhesion increases from 117 to 129 mJ/m 2 ) and reduces the hydrophobic behavior in oil-saturated rocks (work of adhesion drops from 110.3 to 77.4 mJ/m 2 ). The selectivity of the composition performance is validated by its higher wettability of water-saturated reservoir rocks compared with oil-saturated; thus, the composition creates a more stable water shutoff barrier when entering the water zone in a formation. As a result of core flooding experiments in natural, fractured, porous core samples, the efficiency of the water blocking capacity of the composition was proved. In addition, these tests showed the selectivity of the composition because the permeability decrease in water-saturated core samples was higher than in oil-saturated ones. The experimental value of the selectivity coefficient was 152.14.

Keywords: oil; shutoff compositions; fractured reservoirs; water cut; interfacial tension; contact angle; selectivity; filtration properties (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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