Abstract
This paper presents an overview of the Snøhvit LNG project operated by Statoil and includes a description of the gas fields, the development concept, the production strategy and the LNG plant. The CO 2 is separated from the well stream and is stored in an underground structure. The technology for such storage of CO 2 is considered proven by the CO 2 storage at the Sleipner field in the North Sea. The subsea concept and the lack of a huge water-bearing formation similar to the Utsira Formation in the Sleipner area resulted, however, in challenges in establishing a prudent design for the Snøhvit CO 2 injection system. This paper describes the reservoir selection process and the reservoir modelling as well as the CO 2 injection facilities. The reservoir simulations were performed by use of the extended network option in Eclipse, which makes it possible to simulate the gas production from several well clusters combined with the CO 2 injection. The paper reviews the CO 2 injection facilities including compression unit, pipeline, injection well and well control system from shore.
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