H2S AND SULPHUR MANAGEMENT

Kashagan is considered a high-pressure, low-temperature oil field with a high content of ‘sour gas’.
The Kashagan field contains around 52 tcf (trillion cubic feet) of associated gas, most of which will be re-injected offshore to improve oil recovery rates.  For Phase I (EP) not all the associated gas is injected offshore. Some will be sent to the onshore processing facility where hydrogen sulfide is removed (sweetened). The processed, or ‘sweetened’, gas will be used for onshore and offshore power generation and some will be marketed as Sales Gas.  Phase I will produce an average of 1.1 millions of tons of sulphur per year due to the removal of the hydrogen sulfide.

Although the venture plans to market the sulphur that is produced, it is recognised that there may be times when sulphur will have to be stored. The sulphur produced at the Bolashak plant will be stored in covered conditions, isolated from the environment. Liquid sulphur will be poured into sealed containers that will then be monitored by sensors.  Prior to sale, the sulphur will again be melted, not crushed, and reformed into solid pellets, thus helping to avoid dust.
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