Are Exports Driving Mont Belvieu Ethane Prices Higher?

In just over a month, the price of Mont Belvieu purity ethane doubled, from 19 c/gal to 39 c/gal on Friday. Sure, the price of natural gas was up about 15% over the same period. But that increase was nowhere near ethane’s, so it was certainly not the price of gas that was making ethane take off. In fact, with ethane rocketing into space and gas prices still in the dumper, the ethane-to-gas ratio — a key measure of the value of ethane — skyrocketed, soaring from 1.2X in mid-June to 2.2X on Friday. A ratio at this level has only happened twice before in the past decade: once in 2018 due to a collision between fractionation capacity and new petchem plants coming online, and then again in 2020 during the COVID petchem demand surge. But the most recent price surge didn’t last long. On Tuesday ethane came back to earth, crashing 22% in a single day, and the ethane-to-gas ratio deflated down to 1.6X. So what’s happening? There are a lot of conspiracy theories out there that we won’t repeat here. Instead, in today’s RBN blog, we’ll lay out what we think are the most likely contributing factors behind this wild ride.

Since 2011, U.S. natural gas liquids (NGL) production has more than tripled, while domestic demand has grown only modestly. Consequently, the only way NGL markets could balance was a dramatic increase in exports. Today, over 70% of U.S. propane production is exported, with the majority going to overseas markets, while other NGLs see varying export levels: 40% for butanes, 25% for natural gasoline, and 18% for ethane. Although U.S. NGL production growth is slowing, we still project an increase of 1.5 MMb/d over the next decade and a half, with 85% of that growth coming from the Permian Basin. As U.S. ethane and LPG production continues to rise, nearly all the export growth is expected to head to the Asia/Pacific region, with a significant portion going to one country: China. But is this outlook for U.S. NGLs realistic? And do we have adequate infrastructure — ranging from gathering systems to processing plants and fractionators, and from export terminals to the right kind of ships — to handle all of these volumes? In one of his hit tunes, Toby Keith clearly identified the problem for us: “Where You Gonna Go? And What Ya Gonna Do When You Get There?” These are key NGL market themes that we'll be exploring at our upcoming NACON conference on October 24 at the Royal Sonesta Hotel in Houston and that we’ll introduce in today’s RBN blog.

It looks like the U.S. ethane market may have just dodged a bullet. Since late May, the U.S. Bureau of Industry and Security effectively banned ethane exports to China, the destination for two-thirds of the ethane sent out of Gulf Coast docks — about 225 Mb/d in 2024. Ethane has become a bargaining chip in U.S.-China negotiations over rare earths and tariffs, in part because China has no alternative source of waterborne ethane feedstock for its petchems. But playing the ethane card presented a potential problem for the U.S. too. While China isn’t the only export market for U.S. ethane, there are very limited other destinations for the volumes they typically take. The need to find a home for those volumes could have required significantly more “rejection” of ethane into natural gas at U.S. gas processing plants — i.e., selling ethane for its fuel value instead of recovering it for petchems or export.  In today’s RBN blog, we examine the ethane export issue, which remains in flux as part of the broader U.S.-China trade agreement still being finalized.