Deepwater Horizon oil spill

On July 2, 2015, BP reached an $18.7 billion settlement agreement with the United States government and five Gulf Coast states affected by the Deepwater Horizon oil spill. This settlement resolved years of litigation concerning environmental damage and economic losses caused by the disaster. It was the largest corporate settlement in U.S. history at the time and was intended to cover clean-up costs, economic claims, and natural resource restoration efforts. The settlement aimed to address the long-term impacts of the spill on the Gulf Coast's industry, environment, and people.

On September 19, 2010, the U.S. government declared the Macondo well effectively dead after a successful bottom kill operation. This process involved finally intersecting the well with a relief well drilled parallel to the original well. Heavy mud and cement were then used to permanently seal the well from the bottom. This marked the end of active fluid flow from the well and was a crucial milestone in the emergency response to the spill. The completion of the bottom kill gave a sense of closure to months of intensive efforts to contain one of the worst environmental disasters in U.S. history.

On August 4, 2010, BP announced that the static kill operation was successful, meaning that the well was effectively plugged with mud and had ceased leaking oil. Following this, a cementing operation was performed to ensure that the well was permanently sealed. The static kill operation involved pumping mud straight into the blowout preventer at the top of the well, similar to the top kill attempt but this time executed with more precision and favorable conditions. The success of this operation was a major victory for BP and the unified command, demonstrating progress in the overall efforts to control and eventually close out the nightmare well.

After numerous attempts to stop the oil spill, on July 15, 2010, BP successfully installed a new cap on the wellhead, effectively sealing the well temporarily and stopping the flow of oil into the Gulf of Mexico for the first time in nearly three months. This operation was closely watched by the world, and its success marked a significant turning point in the response to the disaster. The installation involved a new cap-and-seal system which finally managed to withstand the pressure from the well, halting what had become the largest accidental marine oil spill in the history of the petroleum industry to date.

On June 15, 2010, BP announced the establishment of a $20 billion fund to ensure compensation for victims of the oil spill disaster. This announcement came amid mounting public outcry and pressure from the U.S. government to make reparations for the enormous economic and environmental damages caused by the spill. This fund was intended to cover claims for damages from residents, businesses, and communities affected by the spill. To oversee the fund, BP appointed Kenneth Feinberg, who had previously administered the compensation fund for the September 11 attacks, as an independent claims administrator.

As the oil continued to spill from the well, BP undertook a "top kill" operation on May 19, 2010, to stop the flow. The procedure involved pumping heavy drilling mud and later cement into the blowout preventer at the wellhead to suppress the flow of oil. This was a high-risk maneuver, as it was never before attempted at such depths, approximately 5,000 feet underwater. Unfortunately, the operation was ultimately unsuccessful. After three days of trying, BP stopped the operation, conceding that it did not work to control the well, marking it as another setback in stemming the spill.

On May 2, 2010, the United States government declared a 10-day closure of fishing areas affected by the oil spill in the Gulf of Mexico, rapidly expanding in size due to the uncontrolled flow of oil from the sunken Deepwater Horizon rig. This closure was a response to the growing oil slick that threatened the valuable marine life and fisheries of the region. Local economies dependent on fishing were dealt a heavy blow as thousands of square miles of waters were closed off, and there was growing concern over the potential contamination of seafood and long-term impacts on the local fishing industry.

Faced with the massive oil leak from the Macondo well, BP engineers attempted to place a huge containment dome over the well on April 29, 2010, in an effort to funnel the oil to the surface for collection. The dome was 98 tons and one of the first techniques attempted to manage the spill despite being an untested measure at such depths. Unfortunately, this attempt was unsuccessful due to problems with methane hydrate crystals forming inside the dome, which made it buoyant and prevented it from working effectively as a capture device. This failed attempt was a major setback in the early stages of containment efforts.

On April 22, 2010, the Deepwater Horizon drilling rig sank into the Gulf of Mexico, two days after the initial blowout and explosion. The sinking of the rig resulted in oil pouring from the undersea wellhead, which could not be immediately contained. As the rig submerged underwater, it took approximately 36 hours for it to completely sink due to the extent of the damage. The event marked the beginning of one of the most challenging environmental disasters in U.S. history, with millions of barrels of oil eventually spilling into the Gulf, causing widespread ecological and economic destruction.

On April 20, 2010, the Deepwater Horizon, an offshore drilling rig operated by Transocean and owned by BP, suffered a blowout while drilling an exploratory well for BP in the Macondo Prospect, located in the Mississippi Canyon about 41 miles off the Louisiana coast. This catastrophic blowout resulted in a violent explosion that killed 11 workers and led to the Deepwater Horizon sinking two days later, causing the largest marine oil spill in history. The explosion was caused by a well integrity failure leading to the uncontrolled release of oil and gas from the well, creating devastating environmental and economic impacts in the Gulf of Mexico region.