On site construction of fracturing geologic characteristic analysis on small scale test

In order to improve the fracturing scale of low porosity,extra low permeability and low pressure reservoir,and optimize construction parameter,FracproPT10.2,a kind of fracturing software,is applied to analyze the active water and fracturing liquid test fracturing of three exploration wells in low permeability formation in Dongzhi and Jiyuan oilfields of Changqing.The results show that the reservoir rock in this region features in low burst pressure and closure stress,low bend friction near well-hole,low net pressure in the fractures after stopping pump,no evidence on fracture expansion,low filtration coefficient etc.,According to the recognition of fractured reservoir characters and the parameters,the construction design of three wells are optimized and implemented.The daily output of these three wells after fracturing are 33.9 m3,26.5 m3,and 17.5 m3 separately.The three wells became the high output wells in Changing Oilfield in 2005.The application results provide important basis for the reserves evaluation of fractured exploration wells and the later hydraulic fracturing design of this region.