贝雷砂岩射孔损害区核磁共振实验研究

An Investigation of Berea Sandstione Damaged Zone Using Nuclear Magnetic Response (NMR)

目的 根据对射孔损害区进行定性和定量的实验研究，分析该区形成机理及影响孔眼流动效率的因素； 方法 根据筛选粒度分析，在显微镜下测定岩石的岩性； 采用核磁共振实验对射孔后贝雷砂岩射孔损害区的岩石性能指标进行分析； 结果 核磁共振实验可定量分析射孔孔眼流动效率； 结论 损害区内岩石的孔隙度和渗透率明显下降，严重影响油井的生产流动效率；

Aim By doing the qualitative and quantitative experimental study, the damage zone formation mechanism and the affecting factors of core flow efficiency were to be analyzed. Methods According to riddling gravel, the specific property of the rock was analyzed with the microscope. The NMR experiments were used for analyzing the characteristics of Berea Sandstone and the damaged zone. Results The core flow efficiency can be analyzed by the NMR experiments. Conclusion The porosity and core flow efficiency in the damaged zone are decreased, which seriously affects the flow efficiency of the oil Well.