Bohai Bay is northern China's largest offshore basin. Its predominant depositional environment is a shallow delta and a meandering river system complicated by faults, an arrangement that leads to fully developed interbed interference and high geological uncertainty when horizontal wells are drilled within the greenfield. As a solution to resulting challenges, a new multilayer boundary‑detection service has been introduced. This paper illustrates a case study in which this technology was applied. In 1967, CNOOC began commercially operating the oil and gas resources of the Bohai Sea (Figure 1 above).