case study

There are considerable benefits to conducting rigless subsea well intervention from specialized monohull vessels.

The general industry perception is that, when drillstrings or casing strings exceed conventional helical-buckling criteria, they cannot be operated safely in the hole because the risk of failure or lockup is too high.

In gas applications with high-pressure drops and/or high-velocity gas flow, acoustic-induced vibration (AIV) occurs when very high sound levels are propagated in piping. This can induce fatigue cracking of the pipe and potentially catastrophic pipe failure.

The Liwan gas reservoir was discovered in the South China Sea Block 29/26 in September 2006.

The Mensa field is a deepwater Gulf of Mexico (GOM) geopressured-gas field, producing from Upper Miocene sand with faulted four-way closure.

This paper discusses the available methodologies for remediation of a pipeline affected by sand and presents examples where the discussed methodologies have been applied.

Semoga and Kaji fields experienced reservoir souring and suffered a history of calcium-carbonate (CaCO3) -scale cases before a proper scale-inhibition program was implemented. Problems with a free water knockout discovered continued scale issues, leading to investigation of the reasons.