...). At the end of the experiment the volume and mass of the slurry in each of the containers were measured and compared to each other, which allowed making a conclusion on the separation of the proppant slugs throughout the outlets mimicking perforations. Several experiments that included pumping of pure...

... fracturing campaign in Northeast Brazil, where severe tortuosity prevented us from achieving the required pump rate while staying below the surface treating pressure limitation. Conventional tortuosity-mitigation methods such as proppant slugs, viscous fluids, re-perforating and sand-jetting all failed...