摘要
利用有限的地应力方向测量数据进行外推，可以估计无测量数据地区的地应力方向，或勾绘地应力轨迹线，从而得到一个油田的总体地应力方向。所得结果可为制定油田开发部署方案提供依据，也可用于预测原生裂缝发育方位。利用地层倾角测井资料得出的钻孔崩落程度，可以估计当地水平差应力的相对大小。估计了岩石中由于水平差应力的存在引起的渗透率各向异性的程度，再用改进的裘布衣公式估算出注水井周围的平面流体等势线分布，可作为井网布局设计的参考依据。以某凹陷为实例，介绍了上述方法的应用效果。
Spatial interpolation and extrapolation of available limited measurements of stress directions result in estimation of stress directions in the places lacking of data. In this way the stress trajectories showing global stress direction pattern of an oil field can be constructed and used for improving well allocation. The same way can also be used for prediction the extending orientation of primary fractures. The degree of the borehole sloughing obtained from analyzing dipmeter logging data is used to estimate the relative magnitude of horizontal differential stress. Degree of permeability anisotropy of formations is estimated from rock experiment data. The Dupuit formula for calculating fluid pressure around a well in isotropic medium is generalized to the case in the medium with anisotropic permeability. Using the generalized formula the isolines of water pressure around injecting wells can be outlined for guiding well allocation design. The analysis method is applied to a sag as an example.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1997年第4期80-82,共3页
Petroleum Exploration and Development
基金
国家自然科学基金!49374214
国家地震局地球物理研究所论著!97A0065
关键词
渗透率
各向异性
布井
油田井网
地应力
Earth crust, Stress, Direction, Estimate, Permeability anisotropy, Well spacing, (Trajectory of stress direction), (Borehole breakout )
