Application of High-resolution Gamma Ray Imaging Technology to Geosteering

With the wide application of geosteering technology to drilling of the horizontal well, logging imaging technology is still one of the practical technologies besides the rapid new developing technology such as boundary detection technology. High resolution gamma ray imaging technology has been used successfully in Weizhou oilfelds in the western part of South China Sea, which are complicated in structure and with great uncertainty in layer dip. High resolution gamma ray imaging technology can provide a clear gamma imaging results in real time, and extract accurate formation dip. On this basis, the morphological analysis can be constructed, and the location of the track can be determined. This technology can improve the effciency of real-time decision-making in drilling horizontal well and guide the geosteering, reduce substantially the geological risks and improve the encounter rate of reservoir.