Managing H2S is a challenge at every stage of gas operations. H2S mitigation techniques are implemented in order to preserve the environment, take care of workers, avoid corrosion and bad smells, and protect the value of products. In selecting a gas sweetening process, responsible engineers need to consider many variables such as gas stream pressure, impurities present in the feed gas, composition of the acid gas and quantity of sulphur to be removed. H2S mitigation technologies are not mutually exclusive and a combination of techniques might be used.
Once H2S testing has been performed (see blog posts on sampling and testing), it is necessary to mitigate its impacts and bring the crude oil to the desired specifications. There are mechanical/operational (physical), biological and chemical mitigation techniques from which engineers choose according to crude characteristics, H2S concentration, economic considerations, and other variables. Hydrogen sulfide is not found in isolation but together with methane, hydrogen and higher hydrocarbons, and traces of nitrogen-, oxygen-, calcium-, and metal- containing species which complicate the selection of the most suitable H2S mitigation technique. In this article we discuss the multiple H2S removal techniques commonly used in crude oil.
The presence of H2S in oil impacts not only the oil price but handling requirements. However, there is no standardized H2S test method specific to crude oil. Although H2S is a single molecule, it is hard to determine its exact levels in crude and many testing methods are available. Ideally, testing is to measure what is actually occurring in the sampling point. However, many sulfur compounds, for example, hydrogen sulfide and mercaptans, are reactive and their concentration in samples may change during sampling and analysis. The most common testing methods and the key considerations when mitigating H2S in crude are discussed here.
Industry experts will gather to share insights and experiences regarding H2S removal from crude oil. Do not miss the opportunity to participate in the first COQA Panel to be held at the Hilton Riverside in New Orleans on March 14th. Hugo Lozano from Q2 Technologies will discuss along with other panelists the key points involved with crude oil treatment to reduce H2S.
While the traditional oil price benchmark has been the Brent crude, oil production in that region has declined whereas the West Texas Intermediate has gained importance and is a valuable reference. The adoption of WTI-Houston pricing would be a significant change in benchmarking history and would acknowledge the importance of US a marginal barrel supplier with market impacts worldwide.
Thank you to the Texas Business Hall of Fame Foundation. Our Hugo Lozano Jr., Vice President and General Manager, was selected as the 2018 scholarship recipient at Rice University's MBA program. This is a great honor and we are very proud of his achievement.
The Chinese oil market is important for US oil exports as new refining capacity is being installed to reach 16 million bbl/d in 2020. However, the 25% tariff that the Chinese government will impose starting July 6, 2018 as a response to the Trump's administration tariffs on Chinese goods will likely affect the US oil exports.