A Study on Safety Analysis During the Construction Period of Oil and Gas Reservoir-Type Storage based on STAMP-STPA

In order to improve the safety level of the construction period of oil and gas reservoir-type gas storage and to address the shortcomings of the traditional safety analysis method that cannot comprehensively consider the interaction between components in a complex non-linear system, the safety analysis of the construction period of gas storage is carried out from three perspectives: control, feedback, and coordination, based on the STAMP-STPA method. Based on the STAMP model to establish a control and feedback model for construction operations and the STPA method to analyze unsafe control behaviors, the analysis obtained vital risk factors, including defects in the compressor installation, poor casing gas tightness, damage to reservoir cavity stability, errors in capping reservoir special play operations and inadequate technical handover, taking underground drilling operations and surface facility installation operations as examples. By comparing the results with the accident tree method and HAZOP method for safety analysis of drilling construction, the STAMP-STPA method has improved the risk identification capability by 38.5%, and the analysis results are more comprehensive in terms of information transfer and personnel psychology. The results show that the STAMP-STPA safety analysis method fits well with the construction period of oil and gas reservoir-type gas storage, effectively solving the problem of risk identification caused by the non-linear and non-stationary characteristics of the system during the construction period of gas storage and providing strong support for risk management.

Keywords: Oil and gas reservoir-type gas storage, Systems Theory Accident Process Model (STAMP), Systems Theory Process Analysis (STPA), Construction period, Risk identification, Drilling.

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