大庆外围特低渗透油藏极限井距的一种确定方法

A Method for Determining the Critical Well Spacing on ultra-low Permeability Reservoirs in the periphery of Daqing field

依据启动压力梯度的非线性渗流方程和矿场实际资料,利用线性回归的数学方法计算出低渗透储层的启动压力梯度。再结合低渗透油藏渗流理论得到了低渗透油藏确定极限井距的公式,可为特低渗透油藏开发确定合理井网密度提供理论依据。

The start-up pressure gradient is derived through processing field data, and the value of start-up pressure gradient in ultra-low permeability reservoir is obtained by linear regression, when considering the nonlinear flow function of start-up pressure gradient. Combined with the percolation theory of ultra-low permeability oil reservoirs ,we derived the function of determining critical technological spacing in ultra-low permeability reservoirs ,and provided the theoretical basis for determining reasonable well spacing density during the development of ultra-low permeability oil reservoir.