The use of multilateral technology (MLT) reduces the number of production wells required to effectively drain a reservoir; consequently, it saves time and reduces costs. Fewer discrete surface locations significantly reduces both investment capital and footprint. Although reducing the infrastructure cost is the primary benefit of multilateral well architecture, in remote arctic environments, additional benefits include reduced project execution time (in this case, approximately 50 less days), which reduces the costs associated with the heating of fluids and equipment and the costs for cuttings disposal.

To take full advantage of the benefits, the appropriate MLT must be selected to avoid introducing additional risk and nonproductive time (NPT) to the project. The requirements for the multilateral system in the Yamal-Nenets area included constructing a mechanically strong junction and preventing communication between the two reservoirs. The TAML Level 4 multilateral technology, which provides hydraulic and mechanical isolation of the connected wellbores, meets this requirement. Although this was the first time that this level of junction was used in the Yamal-Nenets area, it has been used extensively in various geographical areas during the last 10 years.

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