【摘要】 常规注水容易形成杂质颗粒沉淀 ,堵塞孔隙。自激波动注水可为水井增注提供一条新的途径。它借助井下振源把连续水流变成波动水流 ,从而消除地层孔隙中的贾敏及桥堵效应 ,并使孔道壁面的堵塞颗粒松动脱落 ,达到降低注水压力、延长注水周期的目的。根据Biot理论 ,从理论上初步探讨了多孔介质流动中波动能量随传播距离的衰减特性及耦合渗流问题 ,建立了带有损耗项及用固、液相质点位移表示的振动方程式。对已建立的振动方程组进行了差分分解 ,为实现编程计算波动能量在流体饱和多孔介质中的传播奠定了基础。更多还原

【Abstract】 In conventional water injection, the pores in formations are easily subject to blockage of impurities. The self-oscillation upon water injection is a new way to slow down the solid deposition and increase the water injection. On the basis of Biot theory, a mathematical model of energy propagation for self-oscillating water injection in the pore formations is presented. Also, the oscillating equations are established with consideration of energy loss. The resolving method for the equations is analyzed with difference schemes. So, it is legible to compose the computer programs to calculate the equations.更多还原