摘要
侧钻井是在油水井的某一特定深度套管侧面开窗钻出新井眼后下尾管固井的一整套工艺技术。侧钻后新井眼与原井眼在油层动用井段的深侧向电阻率均有不同程度的降低,用电阻率减小率表示。通过分析认为,动用井段油层含油饱和度的变化引起了电阻率的减小。利用阿尔奇公式,可导出剩余油饱和度的计算公式,从而定量评价井筒周围的剩余油饱和度。该方法为定量计算油井剩余油饱和度提供了一条新途径。
Side - tracking well is drilled from casing at certain depth and cemented with tail pipe. The deep lateral resistivities of both the newly drilled side - tracking well and the original hole may reduce differently in producing interval, which is characterized by resistivity reduction. Analysis shows that it is the change of oil saturation in producing interval that has caused resistivity reduction. The equation for computing residual oil saturation can be derived by using Archie equation, thus to quantitatively evaluate the residual oil saturation near wellbore.
出处
《特种油气藏》
CAS
CSCD
2005年第4期44-46,54,i0010,共5页
Special Oil & Gas Reservoirs
关键词
侧钻井
深侧向电阻率
电阻率减小率
剩余油饱和度
高3块
side- tracking well
deep lateral resistivity
resistivity reduction
residual oil saturation
Block Gao3
