Abstract:

Fractures change the flow field near the well bore,and are the important factors affecting the performance of fractured horizontal wells.In order to successfully fracture horizontal wells,it is noted to study the relations between the fracturing parameters and the performances.The pressure distribution characters of fracturing horizontal wells are studied,in which,there are different inclinations between the fractures and the boreholes.Conclusions are drawn as following,firstly,the inclinations between the fractures and the boreholes change the shape of the pressure contour near the well bore,and the contour twists along the inclinations.The contour controls the bigger drainage area with the increasing angle,accordingly the productivity increases with the increasing angle α,and lines with the angle sinα.Secondly，there exits the optimal match including the inclinations,the fracture numbers,the fracture length,the horizontal section length and the fracture space.So the results are instructive for designing fracturing horizontal wells and forecasting productivity.

Key words: fractured horizontal well, electric analog, fracture, pressure contour, stimulation factor 