  In the international oil trade network (iOTN), trade shocks triggered by
extreme events may spread over the entire network along the trade links of the
central economies and even lead to the collapse of the whole system. In this
study, we focus on the concept of "too central to fail" and use traditional
centrality indicators as strategic indicators for simulating attacks on
economic nodes, and simulates various situations in which the structure and
function of the global oil trade network are lost when the economies suffer
extreme trade shocks. The simulation results show that the global oil trade
system has become more vulnerable in recent years. The regional aggregation of
oil trade is an essential source of iOTN's vulnerability. Maintaining global
oil trade stability and security requires a focus on economies with greater
influence within the network module of the iOTN. International organizations
such as OPEC and OECD established more trade links around the world, but their
influence on the iOTN is declining. We improve the framework of oil security
and trade risk assessment based on the topological index of iOTN, and provide a
reference for finding methods to maintain network robustness and trade
stability.
