Influential factors of Horizontal Well Volume Fracturing Productivity in He 8 Tight Gas Reservoir
SU Yuliang1, YUAN Bin1, LI Shuoxuan1, GU Yonghong2, LI Hongying2, SU Guohui2
1. College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, Shandong Province, China;2. Research Institute of Oil Gas Technologyof PetroChina Changqing Oilfield, Xi'an 710021, China
Abstract：Volume fracturing technology could result in a seam-cross network, which is conductive to the development of tight gas reservoir. The horizontal well volume fracturing model is established by considering stress sensitiveness and wellbore friction based on He 8 tight gas reservoirs characteristics. The effect of geologic factors and network features on the efficiency of horizontal well volume fracturing is analyzed by the numerical simulation of different geological conditions. The result shows that network fracturing could change the seepage environment, increase reservoir production extent, improve well performance greatly; the processing factors have different influential extents. The pressure coefficient and permeability mainly affect the volume fracturing efficiency, with the increase of effective remolded volume, the productivity improvement could be more distinct, network width and length, fracture conductivity, and network distribution successively affect volume fracturing remolded efficiency. The research result provides the theoretical basis for both optimal design and effectiveness evaluation of volume fracturing in the tight gas reservoir.