The analytic hierarchy process is introduced to construct energy efficiency index system of gathering and transportation system, which provides a favorable means for energy efficiency evaluation of the system as a whole. Combining with the triangular fuzzy number in fuzzy theory, the judgment matrix construction and weight calculation of AHP are reformed. To some extent, it reduces the defects of hierarchical analysis, such as the strong subjective factors of legal person and the neglect of the model of people's cognition of objective things, and makes the evaluation results more accurate and comprehensiv. Taking a gathering and transportation block of oilfield as an example, the weakness of its energy consumption is found out, and the improvement suggestions are put forward.

Scanning electron microscopy (SEM) is a common and effective method which is used to observe soap fiber structure of grease. With the aid of SEM，the fiber length, shape and arrangement of grease can be observed, then the relationship between structure and performance of grease can be studied in order to improve the using performance of grease. The best operating method of SEM for the observation of grease was obtained from conductive sample processing, operation mode of SEM and sample preparation methods. The results showed that for grease products with different consistency and thickener types, the relative suitable sample preparation method should be groped.