论文部分内容阅读
相对渗透率是制定油气田开发方案的重要基础资料。通常用非稳态流方法测定和用JBN方法计算它,但未考虑非达西流及毛管力的影响,故只适合于中高渗透岩石达西渗流的情形,且要求非稳态相对渗透率实验驱替速度较高。针对水湿和油湿岩心两种情形,分别导出了同时考虑启动压力梯度、毛管力及重力的相对渗透率公式,不受实验驱替速度较高的限制,解决了低渗透岩石非稳态相对渗透率的实验测定和计算方法问题。
Relative permeability is to develop oil and gas field development program an important basis for information. Usually measured by unsteady flow method and calculated by JBN method, but it does not consider the influence of non-Darcy flow and capillary force, so it is only suitable for the case of Darcy permeation of medium-high permeable rocks, and requires unsteady relative permeability experiment Drive speed is higher. For the two cases of water wet and oil wet core, the formula of relative permeability considering starting pressure gradient, capillary force and gravity is deduced respectively, which is not limited by the higher experimental displacement speed and solves the problem of unsteady phase of low permeability rock Experimental Measurement of Permeability and Calculation Method.