Advances in Engineering Research

In the opening chapter of Advances in Engineering Research. Volume 23, the authors describe the unique challenges of the logging tool hardware, measurements, and the spin-dynamics modeling, as well as data processing. The second part of the chapter describes typical NMR pulse sequences that are used for logging measurements, NMR responses for fluids in rock pore systems, and the petrophysical interpretation models and methodologies for petroleum reservoir formation evaluation. Next, the laws of rolling are derived in terms of elastic and geometric properties of rolling bodies and foundations. The rolling resistance coefficient was analytically calculated in the cases a) an elastic cylinder rolling over another elastic cylinder of another material, in particular, over an elastic half-space, and an elastic wheel rolling over the rail of another elastic material; b) an elastic ball rolling over another elastic ball of another material, particularly over an elastic half-space; c) an elastic torus rolling over an elastic half-space of another material; and d) a cylinder, or a ball, or a torus rolling over a tightly stretched membrane or over a thin elastic plate. This collection also deals with pressure tests conducted in EOR (enhanced Oil Recovery) projects where heat has caused changes in the viscosity of the reservoir fluids, which creates a difference in mobility between two zones of the reservoir. Under those conditions, the reservoir becomes a composite with two different zones. As inaccurate results will be obtained if the interpretation of well tests is not conducted properly, the authors present a practical methodology for interpretation. Next, the different trajectory inhibitory effects of laser re-melting on coating microstructure defects are discussed