| dc.description.abstract | Much attention is now being paid to the development of offshore oil and gas fields. Fields located on the continental shelf of the Sea of Okhotsk are of great value as they contain significant volumes of oil and gas. In addition to maintaining production from existing offshore fields on the Russian continental shelf, it is important to engage in the development of unexplored or poorly explored areas. The Sakhalin 1 and Sakhalin 2 projects have been in production for some time. Oil and gas production from these projects continues to this day. The Sakhalin 3 project is developing the Yuzhno-Kirinskoye gas condensate field, which was discovered in 2010. In 2017 and 2018, exploration work led to the discovery of two oil fields, Neptun and Triton, with total reserves estimated at 500 million tonnes. The Triton field was among the top 3 largest fields discovered worldwide in 2018. Today, oil and gas companies strive to develop fields in the safest, most technologically efficient, and environmentally friendly way. Therefore, the assessment of the field potential, the proposal of the field development option and the preliminary version of the production profile calculation is an important task, which can later be used as the basis for selecting the field development option when specifying the field data.
The purpose of this master's thesis is to identify a technical feasible option of developing the Triton field. In Chapter 1 a review of the different phases of an offshore field development is described. The master’s thesis includes in Chapter 2 a description and analysis of the natural, climatic, and geographical conditions in which the field is located. In addition, in Chapter 3, the geology of the Triton field reservoir is described. An estimate calculation using Python programming language of potential geological reserves are made in accordance with the data obtained seismic exploration was performed, and the first well was drilled. Based on data from neighbouring fields and relative phase permeability curves, an approximate value of the oil recovery factor that can be achieved by implementing existing technologies is hand-calculated in Chapter 4. Also, in this Chapter excel calculations were conducted to calculate and plot production profiles for V-0, V1-1, and V1-2 layers (production profiles for layers V1-2 and V-0 are provided in Appendix 2).
Next, Chapter 5, screening of existing concepts for the development of offshore fields on the shelf of Sakhalin and Norway is carried out. A comparative analysis of different field development options is done, and each concept is evaluated. A subsea production system with pipeline fluid transfer to the Moliqpaq platform with further transportation to onshore processing facility is suggested as a result of the concept’s analysis. Finally, in Appendix 4 the maximum allowable wire tension during the lifting operations of subsea template is estimated. A summary is prepared, and an extensive list of references is enclosed.
This master's thesis does not include an economic analysis due to the volatility of oil prices and the prevailing economic uncertainty. The absence of a specific investment date further hinders the ability to conduct a comprehensive economic analysis to estimate prices for oil products leading up to the investment date. The economic can be calculated once the approximate start date of the project has been established, in order to assess whether the project will be economically viable to implement. | |
