|Publisher||International Petroleum Technology Conference||Language||English|
|Content Type||Conference Paper|
|Title||Understanding of Mercury Corrosion attack on Stainless Steel Material at Gas Wells: Case Study|
Ardian Nengkoda, Hendrikus Reerink, Zaher Hinai, PDO, Supranto, Imam Prasetyo, Suryo Purwono, Gadjah Mada University
International Petroleum Technology Conference, 7-9 December 2009, Doha, Qatar
2009, International Petroleum Technology Conference
|1 Drilling and Completions
The X gas field owned and operated by the Petroleum Development of Oman includes two core deep gas accumulations. The gas condensate bearing sandstone reservoir was discovered around 10 years ago, the surface facilities gas plant as Figure 1 is a single train gas processing facility comprised of inlet separation and gas conditioning facilities. The X gas field is tight reservoir with high temperature (150oC downhole) and contains potential high condensate volume. As a part of field development, the next facilities project will be covering the reservoir pressure outside the phase envelope or as a minimum slow the pressure decline such that the volumes of condensate lost within the reservoir are reduced.
Meanwhile, the material selection and corrosion study has been carried out which is designed for 25 years life of operation, considering all gas and fluid impurities such as condensate, produced water that contains 70,000 mg/l Chlorides, 60 mg/l Bicarbonates, 3 mol % CO2 and 50 ppm H2S. During the life scenario, mercury is considered to be a possibility in the feed based on previous gas PVT study. The surface facilties design does not currently consider the impact of Mercury on the process facilities, although the Mercury Removal Unit (MRU) has been installed upstream of the export pipeline to deal with potential Hg levels in excess of the sales gas specification.
|File Size||224 KB||7|