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Experimental Study on the Nonlinear Flow in Ultra-low Permeability Reserviors

Author: LiuZhiYuan
Tutor: YangZhengMing
School: seepage Institute of Fluid Mechanics
Course: Fluid Mechanics
Keywords: Low permeability reservoir Nonlinear flow Experimental study Starting pressure gradient
CLC: P618.13
Type: Master's thesis
Year: 2010
Downloads: 198
Quote: 0
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Abstract


In order to explore the relationship between low permeability reservoir microscopic pore structure with nonlinear seepage , reveal the influence of nonlinear factors , the need to conduct a study of microscopic pore structure and nonlinear flow curve measurement experiment . Nonlinear flow experimental precision of low permeability core requirements of a higher order to improve the experimental accuracy , the the curve measurement accuracy , the nonlinear flow experiments in the laboratory process improvements ; eight typical Jilin Oilfield blocks of low permeability sandstone core subjects combined the nonlinear the seepage experimental and pressure mercury experiment , starting from the microscopic pore structure and seepage study the nonlinear percolation mechanism of low permeability reservoir . Of of Jilin Oilfield 8 block pore structure parameters and nonlinear flow curve analysis , the results showed that the larger radius throats determines the number of effective low permeability core the seepage capacity , large throat proportion of the larger , effective the seepage ability to more strong ; fluid was nonlinear flow in low permeability reservoir , and the presence of starting pressure gradient ; reservoir properties and fluid nature of the impact of nonlinear and starting pressure gradient influencing factors , heterogeneity Vietnam strong nonlinear flow the greater the degree of curve bending , the penetration rate is lower , the higher the starting pressure gradient ; greater the viscosity of the fluid , the higher the starting pressure gradient . The test results verify the nonlinear flow model . By analysis and comparison to determine the parameters describing the nonlinear flow curve , and establish a relationship with the parameters of the pore structure , laid the foundation for pore structure parameters applied in the calculation .

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