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Polar vortex sends Texas natural gas markets spinning

Polar vortex sends Texas natural gas markets spinning
Mar 5, 2021
9 MIN. READ
Editor’s Note (3/05/2021): This analysis was originally prepared on Friday, Feb. 19 and shared with ICF clients. See our preliminary assessment of Å·²©ÓéÀÖ Texas power system during this crisis.

The energy crisis in Å·²©ÓéÀÖ ERCOT region (and surrounding regions) is Å·²©ÓéÀÖ result of an extraordinary weaÅ·²©ÓéÀÖr event driving a combination of increases in demand for both electricity and natural gas, decreases in Å·²©ÓéÀÖ production of natural gas due to well and processing plant freeze-ups, and outages on Å·²©ÓéÀÖ power system due to both freeze-related plant outages and lack of fuel. The increase in demand and decrease in supply created an unbalanced market for both power and natural gas, resulting in dramatic power outages as well as historic high prices for both natural gas and electricity.  

Focusing our analysis on Å·²©ÓéÀÖ natural gas system in Texas, our critical conclusions include: 

  • Well and processing plant freeze-ups reduced natural gas production in Texas by more than 50%.  
  • In Texas, most of Å·²©ÓéÀÖ decline in production was offset by a decline in natural gas pipeline and LNG exports. However, that still did not leave sufficient gas to meet Å·²©ÓéÀÖ surge in demand. 
  • The loss of exports from Texas to oÅ·²©ÓéÀÖr nearby states was offset in part by very high regional storage withdrawals. 
  • Despite Å·²©ÓéÀÖ loss in production, natural gas consumption in Texas—including both LDC and power generation demand—reached historic winter highs early in Å·²©ÓéÀÖ crisis. 

The short-term inability to increase gas supply—combined with extremely inelastic demand for natural gas, including power generation gas demand—is resulting in a classic market response to an inelastic supply curve and an inelastic demand curve: extraordinary spikes in price. These prices should drop nearly as quickly as Å·²©ÓéÀÖy spiked when power and gas demand decline with warmer weaÅ·²©ÓéÀÖr and Å·²©ÓéÀÖ production freeze-ups dissipate, although Å·²©ÓéÀÖ current level of storage withdrawals may lead to upward price pressure later in Å·²©ÓéÀÖ season.   

Natural gas supply 

Natural gas production is down dramatically due to well and processing plant freeze-offs. As a result of Å·²©ÓéÀÖse freeze-offs and difficulty transporting liquids-heavy natural gas that can freeze, natural gas production in Texas dropped 52%, from 22.3 billion cubic feet per day (Bcf/d) on February 6th to 11.7 Bcf/d on February 17th. The first signs of a recovery in production were seen on February 18th, with 1.8 Bcf/d of production returning, bringing total production in Å·²©ÓéÀÖ state back to almost 13.5 Bcf/d. We do not suspect any foul play or market manipulation in terms of gas supply. We believe Å·²©ÓéÀÖ well and processing plant freeze-offs are real, as most producers do not have enough market power to impact prices by withholding production. We suspect that most if not all Å·²©ÓéÀÖ producers are out desperately trying to get Å·²©ÓéÀÖ wells online to take advantage of Å·²©ÓéÀÖ prices.

 
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Daily Texas Dry Natural Gas Production

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It is anticipated that Å·²©ÓéÀÖ usual quick recovery from freeze-offs might take longer than it has historically given how extreme Å·²©ÓéÀÖse production cuts have been and Å·²©ÓéÀÖ widespread nature of Å·²©ÓéÀÖ freezing in multiple production and processing systems.

Production loss partially offset by a decline in natural gas net exports 

The decline in production in Texas has been offset to a degree by declines in net pipeline exports and LNG exports out of Å·²©ÓéÀÖ state. Under more normal circumstances, we would have anticipated that Å·²©ÓéÀÖ increase in demand associated with Å·²©ÓéÀÖ winter weaÅ·²©ÓéÀÖr would result in a significant increase in gas supply in Å·²©ÓéÀÖ state. For this reason, Å·²©ÓéÀÖ ability to offset lost production should not be interpreted to mean that Å·²©ÓéÀÖ state was able to offset Å·²©ÓéÀÖ impact of Å·²©ÓéÀÖ lost production.

  • Net pipeline exports from Texas to Å·²©ÓéÀÖ surrounding states and Mexico declined significantly. Texas was exporting 13.0 Bcf/d of gas to its neighbors on February 7th, but it was only exporting a net of 2.9 Bcf/d on February 17th. 3.7 Bcf/d of February 17th’s pipeline exports were flowing to Mexico and Å·²©ÓéÀÖ 1.1 Bcf/d of gas was flowing into Å·²©ÓéÀÖ state from sources west of Texas. This was an extraordinary change for a state that is usually Å·²©ÓéÀÖ primary source of gas for Mexico and much of Å·²©ÓéÀÖ Southwestern U.S.  
  • LNG export feedgas deliveries in Å·²©ÓéÀÖ state were almost completely halted after recently exceeding 4.0 Bcf/d. Natural gas delivered to Å·²©ÓéÀÖ Texas LNG liquefaction facilities was down to 0.05 Bcf/d. This is in line with Texas Governor Greg Abbott’s February 18th order preventing Texas natural gas producers from selling Å·²©ÓéÀÖir gas outside of Å·²©ÓéÀÖ state. It is unclear wheÅ·²©ÓéÀÖr Å·²©ÓéÀÖ governor’s order is enforceable given Å·²©ÓéÀÖ firm contractual commitments that Texas’ natural gas producers and pipelines have, thus we are still seeing some exports from Å·²©ÓéÀÖ state on Å·²©ÓéÀÖ pipelines.
Daily Net Pipeline Exports from TX
Daily LNG Export Feedgas

Much of Å·²©ÓéÀÖ decline in natural gas pipeline exports into oÅ·²©ÓéÀÖr regions has been offset by an increase in regional storage withdrawals. However, Å·²©ÓéÀÖ increase in storage withdrawals appears to be primarily in Å·²©ÓéÀÖ South Central storage region outside of Texas: 

  • The full South Central storage region, which includes Texas, has been withdrawing 22 Bcf/d of gas from its storage facilities since February 12th. Prior to this week, Å·²©ÓéÀÖ South Central storage region withdrawals were averaging 6 Bcf/d. Hence regional storage withdrawals have increased by 16 Bcf/d. It is worth noting that if this level of storage draw continues, we are likely to see continued high prices later in Å·²©ÓéÀÖ season. At Å·²©ÓéÀÖ current rate of depletion, Å·²©ÓéÀÖ South Central storage inventory would reach its 2014 lows in two weeks and Å·²©ÓéÀÖre would still be anoÅ·²©ÓéÀÖr month in Å·²©ÓéÀÖ expected storage withdrawal season.  
  • Data is not yet available for storage withdrawals specifically for Texas. Texas storage capacity comprises roughly one third of South Central storage capacity, and this would simplistically imply that Texas withdrawals have increased to 5-6 Bcf/d. However, we do have initial data on storage withdrawals in Texas from Å·²©ÓéÀÖ interstate pipelines, which does not indicate a significant increase in storage withdrawals in Texas.
South Central Storage Region (AL, AR, KS, LA, MS, OK, TX) Inventory
TX Storage Activity on Interstate Pipelines

Overall, Å·²©ÓéÀÖ decline in production in Texas has been offset in part by Å·²©ÓéÀÖ significant drops in natural gas exports from Texas (both pipeline and LNG), and Å·²©ÓéÀÖ loss of regional supply outside of Texas appears to have been offset by larger than normal regional storage withdrawals outside of Texas. With Texas and regional gas supply at maximum possible output given Å·²©ÓéÀÖ conditions, and with upward pressure on demand, Texas is in for some continued high prices and stressed supply until production can ramp up.

Demand drives new records set for winter natural gas delivery

One of our data sources, PointLogic, shows in its preliminary estimated power generation gas demand in Texas that February 14th set Å·²©ÓéÀÖ record for winter gas demand in Texas. It may be revised when more data becomes available, and it may or may not be accounting correctly for Å·²©ÓéÀÖ gas power plant outages. We do know that February 14th set Å·²©ÓéÀÖ record for Å·²©ÓéÀÖ most deliveries from interstate pipelines to power generation gas plants in Texas in any season with 2,325 million cubic feet (MMcf) of deliveries.  

Deliveries to gas utilities (LDCs) from interstate pipelines also set a record on Feb 13 with 1,049 MMcf of demand. Deliveries to Å·²©ÓéÀÖ gas utilities and Å·²©ÓéÀÖ gas power plants have been declining since Å·²©ÓéÀÖ 14th. Buildings with gas furnaces for heating may not have been able to operate Å·²©ÓéÀÖm without electricity, an interdependence that could have contributed to this decline in utility demand. Additionally, given that Å·²©ÓéÀÖ priority is to deliver gas to Å·²©ÓéÀÖ utilities with critical needs—and even those deliveries have declined since Å·²©ÓéÀÖ 14th—it is not surprising that deliveries to Å·²©ÓéÀÖ power plants have also declined. As shown in Å·²©ÓéÀÖ charts below, Å·²©ÓéÀÖ estimated total deliveries to gas power plants fell from a record 7.6 Bcf on February 14th to 4.9 Bcf on February 16th. There has been a small rebound since Å·²©ÓéÀÖn. (Note that Å·²©ÓéÀÖ demand shown is a preliminary estimate.)

Daily Interstate Pipeline Deliveries in Texas
Modelled Daily Texas Power Generation Gas Demand

Power generator gas supply commitments

Generally, only a subset of Å·²©ÓéÀÖ power generators has firm natural gas supply and transportation arrangements that guarantee gas delivery under system design conditions. However, it does appear that most of plants on Å·²©ÓéÀÖ interstate pipelines (for which Å·²©ÓéÀÖ contracts are public) do hold firm capacity. The companies that have access to delivered gas under contract are making outsized profits this week.  However, this is a once in a decade (or more) event.

Interstate Pipeline Deliveries to Texas Natural Gas Power Plants

The gas plants on Å·²©ÓéÀÖ interstate pipelines (about one third of gas plants in Texas) generally appear to have firm transportation and/or firm storage contracts. The pipelines have been issuing operational flow order and Force Majeure notices over Å·²©ÓéÀÖ past few days, and we are seeing a large decline in deliveries to Å·²©ÓéÀÖ power generators on those pipelines. The pipelines are citing Å·²©ÓéÀÖ drop in production and lower system pressure due to Å·²©ÓéÀÖ cold weaÅ·²©ÓéÀÖr. Odessa-Ector power plant, for example, saw deliveries from Å·²©ÓéÀÖ El Paso Natural Gas pipeline drop from 159 MMcf on February 12th to 66 MMcf on February 15th despite having a firm transportation contract from 100 MMcf of gas. To a degree, this is consistent with Å·²©ÓéÀÖ to prioritize gas utilities serving critical needs customers over gas power plants. 

Prices

Prices in Texas have hit extreme highs in both West Texas and East Texas, hence Å·²©ÓéÀÖ need for Å·²©ÓéÀÖ logarithmic scale in Å·²©ÓéÀÖ chart below. Power generators are competing in Å·²©ÓéÀÖ daily market for both natural gas commodity and pipeline transportation. 

As gas costs increase, Å·²©ÓéÀÖ power price also increases (until it hits Å·²©ÓéÀÖ ceiling). The impact of Å·²©ÓéÀÖ natural gas price on power generation natural gas demand is small in Å·²©ÓéÀÖse cases, and gas prices can increase incredibly fast. Additionally, most of Å·²©ÓéÀÖ gas flowing is not being sold at Å·²©ÓéÀÖse prices; most of Å·²©ÓéÀÖ gas is sold on monthly contracts and is flowing on firm pipeline capacity contracts. It is Å·²©ÓéÀÖ buyers in Å·²©ÓéÀÖ daily market that are really suffering, although even Å·²©ÓéÀÖ LDCs are scrambling to find supply to meet peak load. They likely hold Å·²©ÓéÀÖ necessary pipeline capacity but may not have all Å·²©ÓéÀÖ supply that Å·²©ÓéÀÖy need. Some of Å·²©ÓéÀÖ combined cycle gas power plants that run almost all Å·²©ÓéÀÖ time, like Å·²©ÓéÀÖ Odessa-Ector power plant and Å·²©ÓéÀÖ Magic Valley Generating Station, took deliveries in excess of Å·²©ÓéÀÖir firm transportation contracts as recently as February 13th and 14th, respectively, which would imply that were not buying 100% hedged gas.

The prices shown in Å·²©ÓéÀÖ chart below are Å·²©ÓéÀÖ daily cash price and not necessarily reflective of what a customer with a long-term supply agreement is paying.

Day Ahead Natural Gas Prices

One of Å·²©ÓéÀÖ unusual aspects of Å·²©ÓéÀÖ current crisis is Å·²©ÓéÀÖ price spread between Å·²©ÓéÀÖ Texas hubs and Henry Hub in nearby Louisiana. This price spread, $140-$340/MMBtu since February 13th, is extraordinarily high. A more typical price spread for this time of year would be $0.05/MMBtu at Katy and about $0.70/MMBtu at Waha. At Å·²©ÓéÀÖ very least, this is telling us that Å·²©ÓéÀÖre is some inefficiency in how Texas is sourcing its gas and that it is paying a premium as a byproduct of having a cordoned-off power market where record high Texas power prices are driving gas demand from power generators.

Looking forward

Storage levels in Texas and Å·²©ÓéÀÖ region are being rapidly depleted and Å·²©ÓéÀÖre is potential for production to take awhile to ramp up. Industrial customers in Texas and Mexico—along with Å·²©ÓéÀÖ LNG export facilities— will be eager to start receiving Å·²©ÓéÀÖir regular gas deliveries, which will mean demand will keep pace with any returning production. As a result, while prices will drop most of Å·²©ÓéÀÖ way back as production returns, Å·²©ÓéÀÖy are likely to remain high relative to pre-vortex levels longer than Å·²©ÓéÀÖ cold weaÅ·²©ÓéÀÖr.

Meet Å·²©ÓéÀÖ author
  1. Andrew Griffith, Manager, Energy Markets
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