Clariant Oil Services Improves Separation Performance in Russian Oil and Gas Facility
Benefits
- Consistent achievement of export crude specification
- 33% Reduction in chemical dose rate, resulting in savings of $200,000 per year
- 40% Reduction in oil-in-water, resulting in an additional 2,000 bpd of oil
Background
A major oil and gas producer in the Eastern Siberia region of Russia had been experiencing operational difficulties around crude dehydration and was not able to regularly meet the crude export specification. Typical production rates were 105,000 bpd of 35o API crude, together with 20,000 bpd of produced water. The produced fluids are processed through two trains, each including heaters and 3-phase separators, before combining at a separation unit and routing to the export reservoir. The inlet temperature ranges from 0°C to 5°C and rises to 45°C during processing. The target export crude water content is 0.05%.
The incumbent demulsifier was injected at approximately 60 ppm upstream of the separation trains and upstream of the separation unit. The production operators were required to significantly change the demulsifier dose rate on a regular basis in order to try and achieve the export water specification. In addition to the dehydration difficulties, the produced water quality was very poor and exhibited very high oil content.
Clariant Oil Services Solutions and Value Delivered
Clariant Oil Services has extensive experience treating low temperature crude oil so, in conjunction with the operator, fluid separation experts were mobilized to the field to perform bottle tests to screen potential candidate products. DISSOLVAN 5910 was developed by Clariant Oil Services specifically for this application, and after a successful field trial was deployed on a continuous basis.
DISSOLVAN 5910 has since been optimized in the field and is currently deployed at approximately 40 ppm, which is a 33% reduction in dose rate compared to the incumbent. This reduction has generated significant annual savings for the operator. Additionally, the stability of the process plant has improved since DISSOLVAN 5910 was deployed, and the improved crude dehydration has enabled the export water specification to be consistently achieved. In fact, the produced water quality has shown a 40% reduction in oil-in-water, which contributes an additional 2,000 barrels of oil per day for export.
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