关键词: 致密油, 缝网压裂, 改进的灰色关联分析, 初期产能, 影响因素

Abstract: Network fracturing is one of the key technologies to enhance the recovery of peripheral tight reservoir in Daqing. In order to explore and improve fracturing effect and economic benefit of fracture network fracturing, it is necessary to further study the influential factors of initial productivity. Aimed at the problem which the correlation degree between the initial production capacity and the influencing factors calculated by the method of traditional mathematical statistics is almost the same. The improved grey correlation analysis (IGCA) is applied to modifying the original model. To analyze the degree of correlation between initial production and effect factors after fracturing, determining the main influencing factors, and the correctness and practicability of this model was verified by examples. The research results show that，under the conditon that seepage field was not changed,it is necessary to improve the formation pressure and enlarge operation scale,so as to improve the network fracturing vertical well fracture network fracturing in tight oil reservoir. The method presents the reliable basis for fracturing design and result evaluation in tight oil reservoir.

Key words: Tight oil, Network fracturing, Improved grey correlation analysis, Initial productivity, Influencing factor