Based on the non-linear seepage flow formula,considering the pattern shape of extra-low permeability fault-block reservoirs whose fluids have non-linear percolation feature,and adopting the stream-tube integral method,a new formula for effective developme%从非线性渗流基本公式出发,应用流管积分法推导了三角形井网有效动用系数计算公式,成果应用表明:对于江苏油田低渗透油藏(K〈10×10^-3μm^2),合理油井井距尽量控制在200m,井排距在150m以内,储层才能得到有效的动用;当油井井距和排距超过这个范围,即使放大注采压差,有效动用系数仍然较低。
展开▼