Experiments on Seepage Flow Patterns in Fine Controlled Fractured Thin and Poor Reservoir

2018 International Conference of Green Buildings and Environmental Management

土木建筑工程;生态环境科学

Yu, Q.N.^1,2 ; Liu, Y.K.^1 ; Liang, S.^1 ; Liu, X.^1 ; Yao, D.^2 ; Yu, Y.^2

School of Petroleum Engineering, Northeast Petroleum University, Daqing

163318, China^1

Daqing Oil Field Co. Ltd, Daqing

163001, China^2

关键词: Fluid flowing;    Gradient distributions;    Horizontal cracks;    Low permeability;    Nonlinear seepages;    Percolation area;    Pressure data;    Strong heterogeneities;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/186/4/012037/pdf
DOI  :  10.1088/1755-1315/186/4/012037

来源: IOP

【 摘 要 】

Experiments on seepage flow patterns in fine controlled fractured thin and poor reservoir were carried out based on artificial core plate models. Pressure gradient distribution is revealed based on pressure data obtained by pressure transducers in artificial core plate models, and sketch maps of seepage flow sections are drawn to study on seepage flow patterns qualitatively and quantitatively. Experiments show that seepage flow patterns in thin and poor reservoir are influenced by permeability, heterogeneity and cracks of fine controlled fracturing, horizontal cracks generated by fine controlled fracturing have greater influence on seepage flow patterns as thin and poor reservoirs have strong homogeneity and low permeability. Fine controlled fracturing can reduce the negative influence of low permeability and strong heterogeneity and expand fluid flow range. Thin and poor reservoirs can be divided into three sections by types of seepage flow for fluid flowing through, i.e. the no-flow section, the nonlinear seepage flow section, and the quasi-linear seepage flow section. The no-flow section is reduced by at least 72% by fine controlled fracturing, and area for fluid flowing through increases correspondingly, and the proportion of quasi-linear percolation area which is more conducive to fluid flow raise by over 87%.