摘要
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<10×10-3μm2),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。
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 development coefficient was deduced by using the stream tube integration method.The research achievement was applied in the well pattern evaluation of low-permeability fault-block reservoirs of Jiangsu Oilfiled.Research results indicated that under the condition of a easonable oil well spacing of 200m and a well row spacing of 150m,the low permeability reservoirs （K10×10^-3μm^2） can be effectively developed.When the oil well pacing and well row spacing exceed the above range,the effective development coefficient is still relatively low even if the injection-production differntial pressure was increased.
出处
《复杂油气藏》
2011年第2期52-55,共4页
Complex Hydrocarbon Reservoirs
关键词
特低渗透断块油藏
三角形井网
有效动用系数
非线性渗流
extra-low permeability fault-block reservoirs
triangle well patterns
effective development coefficient
non-linear seepage flow
