摘要
基于底水锥进、物质平衡和低渗透非达西渗流原理,考虑隔板下部底水锥进的半球形径向渗流方式、隔板非均质性的垂向渗流方式,运用低渗透产能方程和物质平衡原理,推导低渗透带半渗透隔板底水油藏油井见水时间的预报公式。对于低渗透油井下部存在圆形半渗透隔板的底水油藏,由于考虑了启动压力梯度、半渗透隔板项的影响,计算出的油井见水时间要比不考虑以上因素的值更小,也更接近实际。经鄂尔多斯盆地砂岩底水油藏某油井的实际计算,预测的见水时间与实际见水时间较接近。
Based on the bottom water coning, material balance and non-Darcy flow theory of low permeability res- ervoir, taking the hemi-spherical radial flow of the bottom water coning below the barrier and the vertical seepage of the barrier heterogeneity into consideration, the predicting formula of the water breakthrough time for the bottom- water oil reservoir with semi-permeable round barrier is derived for the low-permeability oil producer with the help of low-permeability productivity equation and material balance principle. As for the bottom-water oil reservoir with semi-permeable round barrier in the bottom of the oil well, due to the consideration of the influences of threshold pressure gradient and semi-permeable barrier, the calculated water breakthrough time is shorter and even more ac- curate than that of ignoring the above influencing factors. Through the actual calculation of an oil well in the sand-stone bottom-water reservoirs of Ordos Basin, the predicted breakthrough time agrees fairly well with the actual one.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2013年第5期56-60,共5页
Petroleum Geology & Oilfield Development in Daqing
基金
国家科技重大专项(2011ZX050102003)和四川省教育厅(11ZA016)项目资助
关键词
低渗透油田
半渗透隔板
底水油藏
底水锥进
见水时间
low permeability oilfield
semi-permeable barrier
bottom-water oil reservoir
bottom water coning
water breakthrough time
