关键词: 火山岩储层, 测井识别, 石炭系, 克-百断裂带, 准噶尔盆地, 压裂水平缝, 监测, 计算, 实验, 微地震, 压裂液返排

Abstract: To set up the reasonable development plans and judge the production,it is very important to know the hydraulic fracture geometry of the low permeability reservoir. Theoretical calculation,the Kaiser tests as well as the microseismic and production data monitoring were used to test the forming mechanism,forming conditions, and forming possibility of the horizontal hydraulic fracture. The results show that in the shallow reservoir,the vertical principal stress is the smallest one and it will be horizontal fracture after hydraulic fracturing,and it will be vertical fracture in deep reservoir. The production increases obviously after fracturing,the microseismic monitoring shows the horizontal fracturing characteristics,and there is no flowback of fracturing fluid during the secondary fracturing,which all verify the horizontal fracture after hydraulic fracturing in shallow reservoir in Qilicun oilfield. The horizontal fracture can be judged and monitored by combining the results of formula calculation,laboratory experiment and microseismic monitoring with the changes of the output before and after the fracturing and the field construction results. The research results are applicable to the monitoring of fractured horizontal fractures in similar low permeability reservoirs.

Key words: volcanic reservoir, logging identification, Carboniferous, Ke-Bai fault zone, Junggar Basin, horizontal hydraulic fracture, monitoring, calculation, test, microseismic, flowback of fracturing fluid