In May 1990, OPEC ministers agreed to cut about 1.445 million barrels per day of excess output through the end of July. The goal was to stop a steep price drop by bringing actual production closer to the official ceiling. This set the immediate policy backdrop just months before the Gulf crisis changed supply conditions.
On July 27, 1990, OPEC agreed to raise its target (reference) price for its oil basket to $21 per barrel and set a combined production ceiling of about 22.5 million barrels per day for the second half of 1990. The decision reflected OPEC’s attempt to tighten discipline after earlier overproduction. These quotas and price goals soon collided with a major geopolitical shock.
On August 2, 1990, Iraq invaded Kuwait, creating a sudden threat to global oil supply because both countries were major producers. Markets quickly focused on the possibility of lost exports and wider conflict in the Persian Gulf. The invasion set up a test of whether OPEC (and consuming countries) could stabilize supply and prices.
On August 6, 1990, the UN Security Council adopted Resolution 661, calling on states to prevent imports from Iraq and Kuwait and to block related trade activity. This created a formal international framework that restricted Iraqi oil exports and treated Kuwaiti exports as part of the sanctions regime during the occupation. The sanctions amplified the supply shock by limiting legal market access to those barrels.
On August 25, 1990, the UN Security Council adopted Resolution 665, calling on member states to use maritime measures to enforce the embargo. This strengthened enforcement capacity by supporting interception of shipping suspected of violating sanctions. Stronger enforcement reduced the likelihood that sanctioned oil could reach markets through normal channels.
After the invasion, Saudi Arabia raised crude oil production from roughly 5.5 million barrels per day to about 8.5 million barrels per day within a few months. The purpose was to compensate for a large share of lost supplies from Iraq and Kuwait, which were constrained by sanctions and conflict risk. This shift showed how “spare capacity” (unused production capability) in key OPEC states could be used during emergencies.
On November 29, 1990, the UN Security Council adopted Resolution 678, authorizing member states to use “all necessary means” if Iraq did not comply with prior resolutions by January 15, 1991. This raised the likelihood of a large-scale war, which can disrupt production, shipping, and insurance markets. The resolution helped define the timeline for an escalating crisis that affected oil risk premiums (extra price due to perceived risk).
On January 17, 1991, a US-led coalition began air strikes against Iraq in Operation Desert Storm to end Iraq’s occupation of Kuwait. The start of open hostilities increased concerns about attacks on oil facilities and shipping routes. Governments and industry also monitored whether emergency supplies and OPEC output could keep markets supplied.
On January 17, 1991, the International Energy Agency (IEA) activated a coordinated emergency plan in response to hostilities. The plan aimed to make additional oil available to markets through stock releases and conservation measures. This was a key non-OPEC action designed to limit price spikes and prevent shortages among major consuming countries.
Following authorization announced as the war began, the United States sold 17.3 million barrels from the Strategic Petroleum Reserve (SPR) in its first emergency drawdown. The first delivered barrels arrived on February 5, 1991, and deliveries continued into early April. The SPR sale, combined with other countries’ actions and higher OPEC output, was intended to calm markets during wartime uncertainty.
In February 1991, smoke from burning Kuwaiti oil wells became visible by satellite, with the number of fires peaking around February 22–24. More than 750 of Kuwait’s wells were ignited or damaged, sharply reducing Kuwait’s short-term production capacity even after liberation. This turned a political crisis into a longer physical supply disruption by damaging key oil infrastructure.
On March 12, 1991, OPEC agreed to remove about 1 million barrels per day from the market for the April–June period, setting a production ceiling of about 22.3 million barrels per day. The decision responded to falling prices after the war, when emergency output increases and calmer markets reduced the need for maximum production. This marked a shift from crisis-time supply replacement toward post-war price support.
On April 3, 1991, the UN Security Council adopted Resolution 687, establishing the formal ceasefire terms after the Gulf War. The resolution linked the continuation of certain sanctions to Iraq’s compliance with disarmament and inspection requirements. For oil markets, the decision implied that Iraqi exports would not quickly return to normal volumes, shaping OPEC’s expectations about ongoing supply constraints.
In the first half of 1991, Iraq, Kuwait, and the Saudi–Kuwaiti Neutral Zone produced far less than before the invasion—down by about 5.053 million barrels per day combined. Other OPEC members increased production enough to replace nearly 80% of that decline, with Saudi Arabia making the largest increase. This illustrates how OPEC’s internal rebalancing helped reduce the overall global supply shock, even while sanctions and war damage persisted.
On November 6, 1991, the last of Kuwait’s burning wells was capped, ending the main phase of the oil well fire emergency. The months-long firefighting effort helped restore a path back to normal production, even though broader recovery required additional repairs. With OPEC output policy shifting after the war and major emergency stock releases completed earlier in 1991, this milestone marked the clearest end point of the 1990–1991 supply shock’s direct physical damage.
Gulf War Supply Shocks and OPEC Decisions (1990–1991)