Today Western part of Siberia is still one of the leading oil and gas basins of Russia. However, the deficiency of perspective resources in maturated reservoirs and traps leads to an intense search of new perspectives in non-anticlinal traps. From this point of view, investigating Achimov's low-permeability sediments in the Yamburg oil-gas condensate field is necessarily crucial for maintaining production oil capacity on the required level. It is essential to consider the main issues and questioned areas connected with Achimov formation and recognize its fundamental problems and uncertainties in all aspects of studying to make optimal drilling, completion, and exploration programs for the economically successful development of the reservoirs. This Master thesis will cover the geological composition of the Yamburg field with a focus on the ranking system known as Technology Advancement of Multi-Laterals (TAML), advantages and disadvantages of using various levels of TAML for completion in this geology and the frequent problems faced during well completion stage in the Yamburg field, like Achimov oil and gas formations and Valangin gas deposits and the problems faced in those intervals. Also, a detailed review of multilateral wells construction and completion practices will be carried out for the selection of a possible solution for the Yamburg field. Drilling multilateral wells can be a promising application for the Yamburg field due to the presence of complex geology because this technology reduces enclosed expenses and the number of wells being drilled in the complex formations. Master thesis work will result in the selection of completion technology and solutions for the complex geological structure of Achimov formation with respect to the TAML methodology.