Study On Dynamic Evaluation Of SEC Oil And Gas Technical Reserves

Oil and gas resources are the country's strategic resources,and the petroleum industry is also the pillar industry of our country.The management of oil and gas reserves is one of the important contents of national resource planning.It plays an important guiding role in the development of oil companies' work and development planning.With the successful listing of our three leading oil companies like PetroChina in the United States,how to establish a reserve assessment system that complies with the US Securities and Exchange Commission(SEC)guidelines and reserve assessment talent pool is particularly important.This paper summarizes the research achievements and knowledge of oil and gas resources / reserve classification and reserves assessment methods by domestic and foreign scholars by investigating a large number of documents,and clarifies the research content and methods of this article.By studying the reserves definition and classification system of several authoritative countries and institutions in the world,comparing the historical development and current achievements of China's reserves definition and classification system,the current methods of reserve definition and classification in China and its differences and shortcomings with international standards are expounded.Through the in-depth study of the SEC reserve assessment system,this paper analyzes and decomposes its reserve estimation methods,influencing factors of reserve changes,and reserve assessment process.Combined with examples,it summarizes the method selections and process considerations in the process of SEC reserves assessment.Also,the analysis lays the theoretical and technical foundation for the CNPC Block 6 of Sudan project example.By analyzing the project data of the 6th district of Sudan,the situation of the work zone,the development status and the production situation are clarified.The production dynamic analysis is conducted on the whole project and the typical fault blocks respectively to prepare for the next step of the project's SEC reserves dynamic assessment so that the problems existing in the project are explained.Using the method of production and time declining curves,combined with SEC reserve assessment criteria,the dynamic assessment of technical reserves of the Block 6 of Sudan project is carried out through OFM software.The research results are in line with the actual situation,and provide reliable production forecast for the future production trend of the project.At last,the project team of PetroChina Block 6 of Sudan accepted it.The study believes that oil and gas reserves have five major attributes.The definition and classification systems of oil and gas reserves in different countries or institutions in the world are usually compared with SPE / WPC standards.In the estimation of technical reserves,the volume method and analogy method included in the static method are more suitable for projects that are not developed or in the early stages of development,and the dynamic method is more suitable in the middle and later stages of project development.The development of the Block 6 of Sudan project has reached the middle and late stages,and the production of each oil field has declined significantly.Both PD reserves and P1 reserves assessment results are negatively revised,so the future production situation is grim.It is recommended that production increase measures be taken to improve the production and prepare for enhancing the degree of recoverable reserves at the end of the contract period.