Hydrocarbon filed development is the multistage process, which includes the stages of: growing production, maximum production plateau, decreasing production and the final stage of development. Enhancement of a degree and quality of residual oil production at the final development stage is the important aspect for the improved efficiency of the field development. Decrease of well flow decline rates, maintenance of production target indicators, and thus, improved yield and increased ultimate recovery factor are achieved through the justification and implementation of complex well intervention programs and methods to enhance oil recovery. Therefore, a successful field development requires constant upgrading of technologies and operation methods, which benefit in optimized production processes and increased total volume of produced hydrocarbon. The process of selecting and planning the well intervention programs in offshore fields has its own key features, which should be considered during all decision-making phases, starting from the analysis of geological and field criteria for selecting the well candidates to the conditions for implementing the proposed solutions. Vietsovpetro JV specialists have revised the set of logging data from clastic reservoirs, which allowed defining the structure and volume of reserves after the re-interpretation of geophysical information. Significant influence of a drilling mud invasion zone to the records of lateral log, as well as a presence of polymathic sandstones in a cross-section, made it difficult to interpret the standard well logging and correctly specify the oil saturated intervals. Implementation of a petrophysical modelling and processing of deep/shallow electro logging methods allowed resolving the uncertainties. As a result, the geologic and hydrodynamic models have been built in accordance with the new understanding of the reservoir, as well as the new well intervention program has been proposed to maintain the oil production levels and to increase development of residual oil from White Tiger field of Socialist Republic of Vietnam continental shelf. The approach, described in this article, can be expanded to the similar offshore projects.
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