MULTIPLE-TRANSMIT FOCUSING FOR THE NONDESTRUCTIVE TESTING OF DOWNHOLE CASINGS BASED ON BOREHOLE TRANSIENT ELECTROMAGNETIC SYSTEMS

Multiple-Transmit Focusing for the Nondestructive Testing of Downhole Casings Based on Borehole Transient Electromagnetic Systems

Borehole transient electromagnetic (TEM) array has proven to be efficient for the downhole nondestructive testing (NDT) of metal casings through the eddy-current property.However, restricted by bad downhole conditions, the simple increase of the receiving array is not sufficient enough for improving the downhole NDT performance.In this paper, we pr

read more




Study on Distribution Characteristics and Displacement Mechanism of Microscopic Residual Oil in Heterogeneous Low Permeability Reservoirs

In order to explore the development methods suitable for heterogeneous low permeability reservoirs and study the distribution characteristics of residual oil, photoetched glass and artificial core models with three permeability ratios of 1, 6, and 9 were prepared in this research.Three displacement Wok Rings schemes including polymeric surfactant f

read more