Analytical modeling of gas production rate in tight channel sand formation and optimization of artificial fracture

作者：Wang, Ruifei; Song, Hongqing^*; Tang, Hewei; Wang, Yuhe; Killough, John; Huang, Gang

来源：SpringerPlus, 2016, 5(1): 540.

DOI：10.1186/s40064-016-2176-7

• Tight sandstone gas
• Channel sand formation
• Permeability anisotropy
• Analytical solution

Permeability variation in tight channel sand formation makes an important role in gas production. Based on the features of channel sand formation, a mathematical model has been established considering anisotropy of permeability. The analytical solutions were derived for productivity of both vertical wells and vertically fractured wells. Simulation results show that, gas production rate of anisotropic channel sand formation is less than that of isotropic formation. For vertically fractured well, artificial fracture direction, drainage radius, permeability ratio and fracture half-length have considerable influence on production rate. The optimum fracture direction should be deviated less than pi/8 from the maximum permeability direction (or the channel direction). In addition, the analytical model was verified by in situ measured data. The research provides theoretical basis for the development of tight channel sand gas reservoirs.

• 出版日期2016-4-27
• 单位西安石油大学