Deepwater Horizon Negative Pressure Test Analysis

This technical report examines the negative pressure test conducted during the Deepwater Horizon disaster on April 20, 2010, highlighting critical failures in interpreting test results that led to the catastrophic blowout. The report details the purpose of the negative pressure test, which is to verify well integrity by simulating conditions during temporary abandonment. It outlines the expected indicators of a successful test and contrasts these with the actual anomalous readings observed. The investigation reveals that BP and Transocean personnel misinterpreted the test results, deeming it successful despite clear signs of failure. The report also discusses procedural inadequacies, including the absence of detailed written procedures and insufficient training, which deviated from industry best practices. Furthermore, it identifies violations of regulatory requirements that contributed to the disaster. The findings emphasize the need for stringent adherence to safety protocols and comprehensive training to prevent similar incidents in the future.