Low-field nuclear magnetic resonance (LF-NMR) technology, due to its sensitivity to molecular motion, has demonstrated unique advantages in characterizing polymer crosslinked networks in recent years. It enables rapid and quantitative detection of crosslinking degree in samples, and has emerged as a novel method for analysing the crosslinking degree of HPG fracturing fluids.

Traditional completion fluid systems, such as brine-based and polymer-based fluids, are generally prone to failure at high temperatures, highlighting the urgent need for precise thermal stability evaluation methods.In response to this challenge, low-field nuclear magnetic resonance (LF-NMR) has emerged as a promising technique for investigating the high-temperature thermal stability of completion fluids.

Low-field nuclear magnetic resonance (LF-NMR) technology enables real-time monitoring of fluid distribution, migration, and interactions within the core during injection-based stimulation, providing critical insights for studying stimulation mechanisms and optimising injection parameters.

Portable NMR analysis technology for oilfield applications has become a significant breakthrough in oil and gas exploration in recent years.Niumag’s portable NMR system has earned strong recognition from clients for its outstanding stability and repeatability.

Niumag's constant gradient-based layering technology fundamentally and completely eliminates the influence of end effects from a technical perspective, enabling a more authentic evaluation of core displacement efficiency.This technology maintains the original precision of NMR measurements and is applicable to various types of core samples, including sandstone and shale, without being limited by low-permeability or tight formations.

Low-Field NMR Technology for Dynamic Monitoring of Polymer Injection Processes in Reservoir Cores for Enhanced Oil Recovery

Gas Injection Displacement in Coal Seams, Shale, and Tight Gas Reservoirs is One of the Key Techniques for Enhancing Recovery of the Three Gas Resources and for Improving Underground Gas Drainage and Outburst Prevention.

Imbibition is an effective method for recovering crude oil from matrix pores, but the driving force behind imbibition has not yet been well understood.

Impact of Fractures on Recovery in Low-Permeability Reservoirs

This paper presents the latest work from Professor Luyu Lu’s team at Chongqing University, recently published in Fuel. The study employed a developed load–injection NMR system to monitor online the dynamic evolution of fracture and pore structures in coal samples during hydraulic fracturing under simulated in-situ conditions, providing guidance for hydraulic fracturing engineering.