Petrochemical projects and energy supply areas in all parts of the country are both strategically and economically very important due to the large volume of dedicated budget. In recent years, due to fluctuations in cooperation between domestic companies and contractors, Consultant and foreign investor under the influence of sanctions, these projects have been delayed. This study tries to identify the factors affecting it and to provide appropriate executive solutions to decision-makers and eliminate those factors to reduce delays in the project. Help the oil and gas industry infrastructure. Nowadays, in the world, especially in developing countries, the use of contracts to reduce delays in projects and increase performance and value engineering has been considered. However, in our country, despite the use of this method, international restrictions, including sanctions, have caused problems that we address in this study. Using the study of available sources, a list of factors affecting the delays was prepared and using the opinion of experts, these commoners agreed and approved them. Then, by preparing an online pairwise comparison questionnaire, these factors were prioritized and hierarchical analysis was performed using TOPSIS method. The results showed that finding and concluding a contract with a foreign investor has the greatest impact and delays in holding tenders have the least impact on delays in infrastructure projects in the country's oil and gas industry.