HYTREAT DF 12851A Reduces Methanol-in-Crude Concentration by Nearly 98%
- Reduced methanol-in-crude concentration nearly 98%, from 2,000 ppm to 43 ppm
- Inhibited hydrates from forming with no flowline blockages or pressure spikes
- Prevented producer from installing water wash system, resulting in a gross profit gain of more than $10,850,000
A producer in the Gulf of Mexico was operating a subsea tieback (SSTB) that produced very little water (less than 1% BS&W) and required 1,500 gallons/day (5,678 liters/day) of methanol to remain outside the hydrate risk region.
Due to the low water cut, methanol was transferring into the oil phase. The methanol concentration in the oil phase spiked to levels exceeding 2,000 ppm (via GC analysis), which is well over the pipeline specification of 50 ppm. The pipeline company threatened to shut-in the well if the producer couldn’t lower the methanol concentration in the oil.
A low methanol hydrate prevention solution was requested by the producer. System conditions of the SSTB are described in Table 1 below.
Table 1: System Conditions
|11 mile (17.7 km) long SSTB|
Clariant Oil Services Solutions and Value Delivered
Clariant Oil Services’ HYTREAT DF 12851A, a low dose hydrate inhibitor, was recommended to replace the methanol. Clariant Oil Services replaced 1,500 gallons/day (5,678 liters/day) of methanol with 40 gallons/day (151.4 liters/day) of HYTREAT DF 12851A. This chemical solution inhibited hydrates from forming without causing subsea flowline blockages or pressure spikes.
Clariant Oil Services‘ HYTREAT DF 12851A was successful in lowering the LACT methanol-in-crude numbers to 43 ppm, which is below the pipeline specifications of 50 ppm, thus eliminating the need for any well shut-ins.
Furthermore, Clariant Oil Services’ ability to reduce the LACT methanol-in-crude numbers using HYTREAT DF 12851A saved the producer from having to install a water wash system that would mechanically reduce the amount of methanol in the oil; a process that would have taken approximately one month to set up. By not having to install the system and defer production, the operator realized a gross profit gain of more than $10,850,000.
This information corresponds to the present state of our knowledge and is intended as a general description of our products and their possible applications. Clariant makes no warranties, express or implied, as to the information’s accuracy, adequacy, sufficiency or freedom from defect and assumes no liability in connection with any use of this information. Any user of this product is responsible for determining the suitability of Clariant's products for its particular application.*Nothing included in this information waives any of Clariant’s General Terms and Conditions of Sale, which control unless it agrees otherwise in writing. Any existing intellectual/industrial property rights must be observed. Due to possible changes in our products and applicable national and international regulations and laws, the status of our products could change. Material Safety Data Sheets providing safety precautions, that should be observed when handling or storing Clariant products, are available upon request and are provided in compliance with applicable law. You should obtain and review the applicable Material Safety Data Sheet information before handling any of these products. For additional information, please contact Clariant.
*For sales to customers located within the United States and Canada the following applies in addition: NO EXPRESS OR IMPLIED WARRANTY IS MADE OF THE MERCHANTABILITY, SUITABILITY, FITNESS FOR A PARTICULAR PURPOSE OR OTHERWISE OF ANY PRODUCT OR SERVICE.
Copyright © Clariant International Ltd, 2013.