mprovement of development efficiency for the mature offshore field by the example of White Tiger lower miocene deposits

UDK: 622.276.1/.4.04(4/9)
DOI: 10.24887/0028-2448-2024-5-105-109
Key words: field development, residual oil production, complex well intervention program, reservoir pressure maintenance, expansion of electric submersible pump (ESP) implementation
Authors: A.N. Ivanov (Vietsovpetro JV, the Socialist Republic of Vietnam, Vung Tau), A.A. Lubnin (Vietsovpetro JV, the Socialist Republic of Vietnam, Vung Tau), Dao Nguyen Hung (Vietsovpetro JV, the Socialist Republic of Vietnam, Vung Tau), D.V. Pridannikov (Vietsovpetro JV, the Socialist Republic of Vietnam, Vung Tau), E.V. Kudin (Vietsovpetro JV, the Socialist Republic of Vietnam, Vung Tau), G.B. Marakhov (Vietsovpetro JV, the Socialist Republic of Vietnam, Vung Tau), S.V. Belyaev (Vietsovpetro JV, the Socialist Republic of Vietnam, Vung Tau)

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.

References

1. Kudryashov S.I., Le Viet Hai, Fam Suan Shon et al., The White Tiger field: from the history of development to development prospects (dedicated to the 40th anniversary of the Vietsovpetro joint venture) (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2021, no. 6, pp. 6-14.

2. Merkulov V.P., Posysoev A.A., Otsenka plastovykh svoystv i operativnyy analiz karotazhnykh diagramm (Evaluation of reservoir properties and operational analysis of well logs), Tomsk: Publ. of TPU, 2004, 113 p.

3. Kovalenko K.V., Sistema petrofizicheskogo obespecheniya modelirovaniya zalezhey nefti i gaza na osnove effektivnoy poristosti granulyarnykh kollektorov (Petrophysical support system for modeling oil and gas reservoirs based on the effective porosity of granular reservoirs): thesis of doctor of geological and mineralogical science, Moscow, 2015.

4. Darling T., Well logging and formation evaluation, Elsevier Science, 2005, 336 p.

5. Lubnin A.V., Justification of technical and economic criteria of re-equipment wells from gas lift operation to ESP (In Russ.), PROНЕФТЬ. Профессионально о нефти = PROneft. Professionally about Oil, 2023, V. 8, no. 1, pp. 98-106, DOI: https://doi.org/10.51890/2587-7399-2023-8-1-98-106

6. Shchekin A.I., Grishchenko E.N., Lotfullin Sh.R. et al., Applying statistical and oilfield methods in predicting waterflood induced hydraulic fractures in the injection wells (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 9, pp. 78-81.



Attention!
To buy the complete text of article (Russian version a format - PDF) or to read the material which is in open access only the authorized visitors of the website can. .