摘要
不同黏度下稠油室内实验研究结果,证明了稠油流动中存在启动压力梯度,启动压力梯度随原油黏度的增大而增大。考虑水平井三维空间渗流特征和启动压力梯度,应用速度势理论建立了稠油油藏水平井产能预测新的数学模型。应用新模型,对海上稠油油藏水平井产能进行了预测,分析了启动压力梯度对稠油油藏水平井产量和动用范围的影响:启动压力越大,水平井产能越低;启动压力梯度增大了渗流的阻力,减小了水平井的动用范围。
Laboratory experiments of heavy oil with different viscosities have proved that there exists threshold pressure gradient in heavy oil flow,which increases with oil viscosity.A new mathematical model of horizontal well productivity prediction is established for heavy oil reservoir by using the principle of velocity potential with consideration of three-dimensional seepage flow and threshold pressure gradient.The new model has been applied to prediction of horizontal well productivity in offshore heavy oil reservoir and analysis of the effect of threshold pressure gradient on horizontal well production and producing range.It shows that the higher the threshold pressure,the lower the horizontal well productivity;threshold pressure gradient has led to the increasing of seepage resistance and the decreasing of producing range of reserves.
出处
《特种油气藏》
CAS
CSCD
2011年第1期87-89,140,共3页
Special Oil & Gas Reservoirs
基金
国家科技重大项目外协子课题"海上稠油油藏不同井型生产能力及注入能力评价技术研究"(2008ZX05024-04-003)
关键词
稠油油藏
水平井
三维空间渗流
启动压力梯度
heavy oil reservoir
horizontal well
three-dimensional seepage flow
threshold pressure gradient
