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利用出砂模拟实验装置,进行室内防砂模拟实验。观察和分析控制条件下常规稠油油藏的出砂行为,分析了出砂机理及各类生产工艺与参数对出砂的影响。使用X衍射仪对岩样进行了矿物组分测试,分析了黏土矿物含量对出砂的影响。岩石固有的矿物组分是影响其胶结强度的内因,发现黏土矿物含量最高可达17.3%,且伊蒙混层中蒙脱石含量高达36%,黏土矿物吸水膨胀性强。实验表明,压力波动比压力本身对出砂的影响更大;产砂量和产液量互相依赖,出砂增大了地层的渗透率,产液量随之增加。
Using sand simulation experimental device, indoor sand control simulation experiment. The sand production behavior of conventional heavy oil reservoirs under controlled conditions was observed and analyzed. The effects of sand production mechanism and various production processes and parameters on sand production were analyzed. The X-ray diffractometer was used to test the mineral composition of rock samples. The influence of clay mineral content on sand production was analyzed. The inherent mineral component of rock is the internal factor that affects the cementation strength. It is found that the content of clay mineral is as high as 17.3%, and the content of montmorillonite in mixed layer of Yimeng is up to 36%. Experiments show that the pressure fluctuation has more influence on the sand production than the pressure itself. The sand production and the liquid production depend on each other. Sand production increases the permeability of the formation and the fluid production increases.