The importance of pinpoint horizontal well landing

Abstract

Summary The development of geologically complex fields with horizontal wells often requires the use of special technologies not only directly for drilling a well within the target interval, but also for well landing. This paper considers an example of the well landing special requirements with the aim of further successful drilling in the target zone in the conditions of the Filanovsky field edge area (North Caspian Offshore). The development target is the Lower Cretaceous sediments (Neocomian superstage), represented by interlayering of sandy reservoirs and clay-siltstones, changing their thickness and properties both in the northeastern and southwestern directions. The oilfield is characterized also by presence of fault zones (with amplitudes from 1 to 65 m). In addition to these geological and structural uncertainties during horizontal wells drilling on the edge parts of the structure (fold wings), significant structural angles cause additional complexity. One more important condition for the successful well landing is the fluid contacts crossing in definite parts of the section. Ultra-Deep Electromagnetic Logging While Drilling Mapping Technology was used to solve successfully all uncertainties and tasks.