Abstract

An auto gas lift (AGL) serves the same function like any other Gas lift Mandrel (GLV). In Auto gas-lifted wells, gas from either a gas zone or gas cap is used for lifting liquid hydrocarbon from wells having an oil zone below using commingled completion. The gas energy which is being produced from the same well is often used to lift the liquid hydrocarbon from below and maximise the production without having to inject gas from surface. The above can be suitably modified if we ascertain the zonal contributions in the well through Production Logging. Knowing the zonal contributions, the orifice of AGL can be optimised in such a way so as to maximise the liquid hydrocarbon lifting. In the present paper, the well was completed in Lower B formation for oil exploitation with a provision for Auto gas lift utilizing gas from Upper B formation. Production Logging (PL) was done in this well and zone-wise contribution was mapped and recirculation of water and hydrocarbon observed. Optimization of Auto Gas Lift (AGL) was done based on PL results and oil gain of 417 bopd was achieved in the well. Before PL, the well was flowing with 95% w/c and after optimization of AGL, it started flowing with oil rate almost similar to initial production rate and with reduced water cut in comparison to initial w/c.