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- W2354973087 abstract "It is well known that utilizing the seismo-electric prospecting and electrokinetic logging could obtain the more formation information including porosity,permeability and water saturation which are the most important parameters to evaluate the hydrocarbon.And the study of frequencydependent streaming potential in oil-water bearing argillaceous sandstone can help geophysicist understand their microscopic mechanism.But it is very difficult to quantitatively describe the phenomenon because of the complicated pore-throat structure,the distribution of oil and water in the pore,and the influence of wettability.To solve the problem,this paper firstly created a new capillary model considering water wettability to describe oil-water bearing the rocks according to its microscopic pore structure,and gave the conversion formulas between macroscopic transport parameters of the reservoir rocks and microscopic parameters of the capillary model.Then,based on the solution of Navier-Stokes equation obeyed by the water and oil flow,respectively,and combined with the theory of electrochemistry transfer dynamics,the mathematical method to describe the frequency-dependent streaming potential was established.Finally,quantitatively analyze the influence of water saturation on the frequency response of streaming potential.This results show that the frequency dispersion characteristics of streaming potential are dependent on interaction between the viscous force and inertial force because that they control the fluid flow.Both of oil-phase and waterphase effective permeability increase with the increasing of porosity.The higher water saturation increases the waterphase effective permeability and decreases the oil-phase effective permeability.With the water-wet condition,the coupling coefficient of the streaming potential increases with the increasing of water saturation,and decreases with increasing of irreducible water saturation.Additionally,the relative coupling coefficient of streaming potential also increases with the increasing of water saturation,and doesn' t have dispersion phenomenon." @default.
- W2354973087 created "2016-06-24" @default.
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- W2354973087 date "2014-01-01" @default.
- W2354973087 modified "2023-09-22" @default.
- W2354973087 title "The frequency dispersion characteristics of the streaming potential in oil-water bearing argillaceous sandstone" @default.
- W2354973087 hasPublicationYear "2014" @default.
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