An electrical-submersible-pump (ESP)/automated-gas-lift completion was developed to overcome production challenges encountered in the Stag oil field. The flow from the horizontal section of the wells has a high gas fraction, continuously slugs, and carries large volumes of sand. Also, the reservoir pressure has depleted more rapidly than expected. The completion design allows natural flow through either the tubing or the annulus, ESP lift through the tubing augmented by automated gas lift through the annulus, or conventional compressor-driven gas lift through the annulus.