PETROSWEET HSW7336 H2S Scavenger Eliminated Solids in Haynesville Shale Gas Tower ApplicationOperator saved USD 90,000 with a single application
An operator in the Haynesville Shale in Louisiana had a gas well that produced 300 ppm of hydrogen sulfi de (H2S). To enable gas shipments, the H2S had to be scavenged to 50 ppm. The operator had to scavenge the H2S to 0-3 ppm in order to avoid deposition of intractable spent triazine solids.
While triazine is a valuable tool in removing H2S from oil and gas production, the operator discovered that it can also cause mineral scales and intractable solids to form. This resulted in tower cleanouts to remove the spent solids and acid washes to remove the mineral scale. The operator also had to store the spent triazine in a separate holding tank. Methanol was required to keep the spent product fl uid at temperatures below 50°F (10°C). Finally, the spent product had to be transported to a waste disposal facility over 200 miles away for further handling, leading to additional costs and health, safety, and environmental risks.
To help the operator combat these issues, Baker Hughes developed the PETROSWEET™ HSW7336 H2S scavenger. A one-month field trial of the new product resulted in complete elimination of the solids formed by the triazine, as well as elimination of the mineral scale formed in the towers and the dump valves caused by produced water carryover reacting with highpH triazine. The spent H2S scavenger was routed directly to the disposal water tank, eliminating the need for a separate holding tank. And because the PETROSWEET HSW7336 scavenger’s spent product had a pour point of 19°F (-7°C), no methanol was needed to maintain its fluidity.
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