Study of Non-Equilibrium Arms Bridge Circuit for Water Plugging of Horizontal Wells in Sandstone Reservoir

Gang Xie; Hai Jun Yan; Deng Feng Ju; Zhi Ma; Ai Jun Wei; Wei Qi Jiang; Li Li Zhang; Meng Xiang Gao

doi:10.4028/www.scientific.net/AMR.912-914.765

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 912-914Study of Non-Equilibrium Arms Bridge Circuit for...

Study of Non-Equilibrium Arms Bridge Circuit for Water Plugging of Horizontal Wells in Sandstone Reservoir

Abstract:

In view of rapid water cut increasing and poor oil recovery with banded distribution with high permeability belt in sandstone reservoir of Huabei Oilfield,the electrical bridge technique for water shut-off is proposed. Based on years practice of vertical wells and similarity in Ohms and Darcys laws,the electrical model involved variable resistors series/parallel instead of reservoir distribution,the arm-bridge circuit combined with signal detection. Then response of the circuit by variable water shut-off could be simulated. The results indicated that,the driving pressure and seepage quantity at mid-low permeability channel could be greatly improved by the strong in-depth water-plugging at high permeability channel (L=20~40m),and the low permeability flowrate increased to a maximum of 55.3%. Then the gel dam in-depth fluid diversion technique was verified by water plugging and circuit simulation. The conclusions provided a valuable guidance for horizontal wells development enhanced.