A major operator offshore China was faced with drilling a horizontal well that required continuous, quantitative porosity and fluid characterization while drilling, without reliance on radioactive neutron-density measurements. Regulatory requirements and logistical constraints mandated a fully sourceless formation evaluation solution. The well design featured a long high-angle build section transitioning into an extended horizontal interval, making measurement stability and signal robustness critical for reliable reservoir evaluation across the entire drilled section. Consequently, the operator required a service that would replace conventional solutions.
Throughout the drilled interval, the MagniSphere service delivered continuous sourceless porosity and fluid-sensitive outputs with stable signal response. The relaxation distributions clearly differentiated bound from movable fluid components, enabling consistent reservoir characterization without nuclear measurements. Both measurement repeatability and signal stability were maintained across the entire horizontal section. Benchmarking against nuclear-based porosity from an offset well in the same reservoir showed strong agreement, validating the MagniSphere service as a primary porosity measurement in this offshore environment.
