Probabilistic Cost and Time Estimation of Rigless Plug and Abandonment

摘要

With a high demand for plug and abandonment (P&A) of subsea wells in the future on the Norwegian continental shelf, industry is challenged to find alternatives and rigless technologies that can make P&A operation more cost-effective and -efficient. Light-well-intervention vessels (LWIVs) can take over some parts of P&A operations and release semisubmersible rigs to function in the drilling and completing of new wells. This paper covers potential and experience of LWIVs in P&A.