The Volga Urals basin of Western Russia has a very long production history and consequently many of the original target reservoirs have become depleted. The Uzenskoe field is no exception. Originally placed on production in 2008 the original target layers in the lower Cretaceous formations have since depleted. It was assumed that potentially productive reservoirs exist in the overlying layers; however, these had never been evaluated. Using a variety of through-casing measurements these layers were investigated for productive potential. Integrated interpretation of the acquired data was used evaluate lithology, rock composition, saturation and porosity to identify potentially productive layers. These layers were then perforated and tested with a wireline conveyed formation tester inside casing. Fluid type was verified, samples were acquired and pressure transient analysis was performed to determine layers permeability. The entire evaluation took less than three days of rig time comparing very favorably with alternative methods. In this paper we discuss the planning, execution and interpretation of this evaluation exercise.

Summary Liquid hydrocarbon quantity optimization is among key technological indicators in the gas condensate fields development. To achieve it one needs to select and maintain optimal well-operating conditions. In this case, multiphase flow measurements are prioritized as an important optimization tool. The article presents a proven record of implementing the technology of instrumentalised virtual multiphase flow metering in the wells of the Vostochno-Makarovskoye gas condensate field to increase the efficiency of liquid hydrocarbon production. Virtual flow metering technologies that use modeling methods and adapt models to actual well-operating parameters aiming at determining well production rates are becoming increasingly popular. At that, the quality of the data at the model input does not often guarantee a qualitative determination of multiphase flow parameters. This article presents a track record of building a virtual multiphase flow meter based on single-phase streamer flow meters mounted on gas wells. Venturi flow meters were used. A series of well tests were conducted in various modes. To configure the streamer model, additional tuning studies were conducted on the separator. While testing the wells, the results of constructing a streamer model were verified by nodal analysis.

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