关键词: 低渗透率储层, 矩形井网与压裂一体化模式, 启动系数, 产量, 计算方法

Abstract: Based on the basic formulas of low-velocity non-Darcy flow,the calculation method of startup coefficient and production rate of the rectangular well pattern and fracturing integration production mode for the low-permeability reservoirs was deduced using the unit analysis method and streamlined integration method.The new method is named as ND-Ⅱ.The influences of fracture length and well alignment interval on the production rate and producing status of reservoir were analyzed using the new method.It is theoretically proved that the production mode with rectangular well pattern and fracturing integration is more suitable and effective for extra-low permeability reservoirs than the conventional areal pattern.The fracturing technology is not only the production-increasing measure,but also the development measure for changing seepage of reservoirs.The new calculation method can be used to design the geometric parameters of well pattern,calculate the production rate and evaluate the producing degree of reservoir with the production mode of rectangular well and fracturing integration for low-permeability reservoirs.

Key words: low-permeability reservoir, rectangular well pattern and fracturing integration production mode, startup coefficient, production rate, calculation method