Abstract: Compared with traditional geological steering drilling, automatic seeker drilling is capable of automatic seeker information collection, which is the goal that drilling operators have been pursuing. The automatic navigation technology mainly includes several processes, such as formation prediction around wells and three-dimensional visualization, navigation model construction, automatic identification of stratigraphic boundary, and formation characteristics, automatic identification of highquality reservoirs and automatic optimization of trajectory. The first three processes consist of the construction of visual navigation stratum model, which can be used to make macroscopic prediction and indication of the location and ductility of oil and gas enrichment target stratum; automatic identification of stratigraphic boundary, real-time automatic analysis of stratum characteristics and automatic identification of high-quality formation for precise prediction of the boundary position of stratum near drill bit, and to provide real-time lithology, physical properties and oil-bearing property of stratum, so as to accurately determine the drilling side; the automatic trajectory optimization used for automatic plan for the next drilling plan. The implementation of this technology requires the combination of near-bit gamma-ray and far-detection resistivity instruments. The technology has been applied successfully, and the navigation model formed is basically consistent with the actual drilling strata. The application results show that the downhole visual automatic seeker drilling technology provides a new technical means for high-speed drilling construction and improving the drilling rate of high-quality reservoirs.

Key words: formation model, visualization, navigation model, formation boundary, borehole trajectory