【摘要】 随着塔里木盆地定向井钻井不断增多,针对定向井钻前沿井眼轨迹的三压力(孔隙压力、坍塌压力、破裂压力)预测的需求日益迫切。从井壁稳定的力学机理出发,分析定向井井周应力分布规律,建立定向井井壁稳定力学模型,利用地震、测井联合的反演技术构建定向井井轨迹上的纵波、横波、密度等岩石物理信息,为定向井开钻前提供地层三压力预测剖面,确定安全钻井液密度窗口,为钻井设计提供参考依据。更多还原

【Abstract】 With the increase of directional wells in Tarim Basin, the demand for predicting the three pressures(i.e. pore pressure,collapse pressure and fracture pressure) along the wellbore trajectory before drilling the directional well becomes more and more urgent. The stress distribution rule around the directional well is analyzed, and a mechanical model for well wall stabilizing is established based on the mechanical principle for stabilizing the borehole wall. The physical information of the rock such as longitudinal wave, transverse wave and density along the directional well trajectory are obtained by using the seism-logging integration inversion technology, which can provide reference for the prediction of three pressures, the determination of the safe drilling fluid density range and well-drilling design before drilling.更多还原