低渗透储层容易产生高速非Darcy流吗?

High rate non-Darcy flow is easier to occur in low permeability reservoirs?

高速非Darcy流导致附加的压力损失,降低流体的流动效率,对油气生产十分不利。到底是低渗透储层容易产生高速非Darcy流,还是高渗透储层容易产生,一直没有明确的认识。前人研究结果显示,低渗透储层容易产生高速非Darcy流,但低渗透储层的流体流动极其困难,生产过程很难产生高的渗流速度。该文根据流体力学的相关知识,研究了高速非Darcy流产生的条件和高速非Darcy流的影响因素,并认为:高渗透储层容易产生高速非Darcy流,而低渗透储层不容易产生,低渗透储层的开发过程可忽略高速非Darcy流的影响。

High rate non-Darcy flow increases additional pressure drop and decreases flow efficiency in reservoirs, which is unfavorable to petroleum production. Whether high rate non-Darcy flow is easier to occur in low permeability reservoirs or in high permeability reservoirs is a problem unsolved well. Previous experiment results by several authors show that low permeability reservoirs are more suitable for high rate non-Darcy flow to occur. However flow in low permeability reservoirs is extremely difficult and high rate can not be reached usually. According to mechanics of fluids, conditions of high rate non-Darcy flow and factors causing high rate non-Darcy flow were studied. It is considered that high rate non-Darcy flow is easier to occur in high permeability reservoir than in low permeability reservoir. So the effect of high rate non-Darcy flow can be neglected in development of low permeability reservoirs.