Selection of Integrated Template Structures for Shtokman Phase I Field Development

Ove Gudmestad

In the paper, an analysis of several functioning projects has been carried out, where their specifics were thoroughly studied and conclusions made. One of the important parts of the work was devoted to the requirements to integrated template structures conceived in relevant NORSOK, ISO and DNV standards. The Main elements of Subsea Production Modules are considered in the work, their specific characteristics and components. Arctic metocean conditions that can affect selection, installation and the operational conditions of templates are analyzed. Operations and installation of subsea modules at Shtokman location are considered in the paper. 4 scenarios with different numbers of integrated template structures (2, 4, 6 and 8) and different numbers of wellslots in each were suggested and analyzed. For each scenario an analysis of related marine operations for the subsea modules was carried out. A program for installation cost estimates was built that enabled us to find the optimal scenario for the integrated template structures design. Various parameters affecting the cost of subsea infrastructure were analyzed and studied from different perspectives, e.g. installation cost, geometrical well pattern system, the distance between drilling centers, drilling costs, etc. Risk analysis regarding the threats and consequences is also performed; risk assessment matrices and mitigation actions are established. As a result, a model for selecting an optimal Integrated Template Structure for the arctic/subarctic regions and Shtokman phase I field development was built.

AAPG Search and Discovery Article #90177©3P Arctic, Polar Petroleum Potential Conference & Exhibition, Stavanger, Norway, October 15-18, 2013