Analysis on energy efficiency evaluation method of key energy system in oil and gas fields: Taking the Tarim oilfield as an example

In view of the current problems of unclear boundaries and incomplete evaluation method for energy efficiency evaluation of energy consumption systems in oil and gas field enterprises, a set of energy efficiency index system with clear boundaries used for reasonable characteristic of the energy efficiency was established by analyzing the energy consumption structure and evaluation status of the energy consumption system combined with the relevant current standards. The energy efficiency index system covers 16 indicators at three levels. The testing and calculating methods of these indicators were determined and a weighted comprehensive evaluation method of energy efficiency based on matrix operation was proposed for the vertical and horizontal comparison of the system energy efficiency level. Taking six stations in Tarim oilfield as an example, the results of the current common evaluation methods were compared with those of the comprehensive methods proposed, to verify the rational reflection of the index system and weighted comprehensive evaluation method for the energy efficiency level of the corresponding systems. The example could also provide the basis for the improvement of energy conservation measures and the related energy conservation work. Through the analysis of application effect, it was found that there are some problems in the current standards, such as the lack of detailed classification of index limits and the inability to cover all typical working conditions. And then the future direction of the standard to be revised and improved was proposed in order to ensure the rationality, applicability and advancement of the standards, and to promote the continuous improvement for related energy-saving management work.