Polar vortex sends Texas natural gas markets spinning

Polar vortex sends Texas natural gas markets spinning
Mar 5, 2021
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 the Texas power system during this crisis.

The energy crisis in the ERCOT region (and surrounding regions) is the result of an extraordinary weather event driving a combination of increases in demand for both electricity and natural gas, decreases in the production of natural gas due to well and processing plant freeze-ups, and outages on the 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 the 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 the 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 the surge in demand. 
  • The loss of exports from Texas to other nearby states was offset in part by very high regional storage withdrawals. 
  • Despite the loss in production, natural gas consumption in Texas—including both LDC and power generation demand—reached historic winter highs early in the 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 they spiked when power and gas demand decline with warmer weather and the production freeze-ups dissipate, although the current level of storage withdrawals may lead to upward price pressure later in the season.   

Natural gas supply 

Natural gas production is down dramatically due to well and processing plant freeze-offs. As a result of these 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 the 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 the 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 the producers are out desperately trying to get the wells online to take advantage of the prices.

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Daily Texas Dry Natural Gas Production

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It is anticipated that the usual quick recovery from freeze-offs might take longer than it has historically given how extreme these production cuts have been and the widespread nature of the 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 the state. Under more normal circumstances, we would have anticipated that the increase in demand associated with the winter weather would result in a significant increase in gas supply in the state. For this reason, the ability to offset lost production should not be interpreted to mean that the state was able to offset the impact of the lost production.

  • Net pipeline exports from Texas to the 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 the 1.1 Bcf/d of gas was flowing into the state from sources west of Texas. This was an extraordinary change for a state that is usually the primary source of gas for Mexico and much of the Southwestern U.S.  
  • LNG export feedgas deliveries in the state were almost completely halted after recently exceeding 4.0 Bcf/d. Natural gas delivered to the 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 their gas outside of the state. It is unclear whether the governor’s order is enforceable given the firm contractual commitments that Texas’ natural gas producers and pipelines have, thus we are still seeing some exports from the state on the pipelines.
Daily Net Pipeline Exports from TX
Daily LNG Export Feedgas

Much of the decline in natural gas pipeline exports into other regions has been offset by an increase in regional storage withdrawals. However, the increase in storage withdrawals appears to be primarily in the 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, the 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 the season. At the current rate of depletion, the South Central storage inventory would reach its 2014 lows in two weeks and there would still be another month in the 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 the 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, the decline in production in Texas has been offset in part by the significant drops in natural gas exports from Texas (both pipeline and LNG), and the 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 the 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 the 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 the gas power plant outages. We do know that February 14th set the record for the 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 the gas utilities and the gas power plants have been declining since the 14th. Buildings with gas furnaces for heating may not have been able to operate them without electricity, an interdependence that could have contributed to this decline in utility demand. Additionally, given that the priority is to deliver gas to the utilities with critical needs—and even those deliveries have declined since the 14th—it is not surprising that deliveries to the power plants have also declined. As shown in the charts below, the 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 then. (Note that the 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 the 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 the interstate pipelines (for which the 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 the 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 the past few days, and we are seeing a large decline in deliveries to the power generators on those pipelines. The pipelines are citing the drop in production and lower system pressure due to the cold weather. Odessa-Ector power plant, for example, saw deliveries from the 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 the Texas Railroad Commission order to prioritize gas utilities serving critical needs customers over gas power plants. 


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

As gas costs increase, the power price also increases (until it hits the ceiling). The impact of the natural gas price on power generation natural gas demand is small in these cases, and gas prices can increase incredibly fast. Additionally, most of the gas flowing is not being sold at these prices; most of the gas is sold on monthly contracts and is flowing on firm pipeline capacity contracts. It is the buyers in the daily market that are really suffering, although even the LDCs are scrambling to find supply to meet peak load. They likely hold the necessary pipeline capacity but may not have all the supply that they need. Some of the combined cycle gas power plants that run almost all the time, like the Odessa-Ector power plant and the Magic Valley Generating Station, took deliveries in excess of their 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 the chart below are the 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 the unusual aspects of the current crisis is the price spread between the 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 the very least, this is telling us that there 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 the region are being rapidly depleted and there is potential for production to take awhile to ramp up. Industrial customers in Texas and Mexico—along with the LNG export facilities— will be eager to start receiving their regular gas deliveries, which will mean demand will keep pace with any returning production. As a result, while prices will drop most of the way back as production returns, they are likely to remain high relative to pre-vortex levels longer than the cold weather.

Meet the authors
  1. Andrew Griffith, Manager, Energy Markets
  2. Michael Sloan, Senior Managing Director, Gas Energy Markets

    With over 35 years of experience, Michael provides analytical and regulatory support to assess the impact of decarbonization policy on gas utility clients. View bio

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