A dual-porosity finite element formulation for instability analysis of borehole in rockmass;
井孔岩体稳定分析的弹塑性有限元格式
The mechanical behaviour of rockmass around an arbitrary inclined borehole and its coupling with multiphase flow were investigated.
并给出了任意倾角的孔隙裂隙岩体中井孔围岩的变形与岩体内部流体的流动的数值解。
The stresses around a borehole are obtained.
假设材料为非线性弹性弱化脆性材料 ,采用幂率形式的强度准则 ,使用逐步递进的计算方法 ,得到了井孔周围的应力分布。
Based on the theory of large spatial deflection of elastic rod,this paper sets up a differential equilibrium equation governing tubulars constrained in inclined wellbores in convected coordinate system.
利用弹性杆的大变形理论,在拖带坐标系下建立了斜直井孔约束下钻柱的平衡微分方程。
The effect of the calibration borehole size, properties of medium and different absorption material outside the outmost interface of the borehole on the borehole wavefield a.
为研究套管刻度井中模拟地层有限、第一和第二界面都胶结良好时井孔声场的传播特点 ,采用实轴积分法计算了该模型井中由对称轴上的点状声源在不同中心频率、不同源距下激发的全波列 ,分析了刻度井几何尺寸、介质特性以及不同的外边界吸声材料对井孔声场的影响 。
The distribution of poles in the contour integral evaluation of the wavefield within a fluid-filled borehole;
充液井孔声场的路径积分估值中的极点分布(英文)
In order to describe the geometric characteristics of the centerline of borehole with directional survey data and predict the drag of casing in running, the relations among the unit base vectors in natural curvilinear coordinates and the deviation and azimuth angles along the borehole centerline are established.
为了用测斜数据描述井孔轴线的几何特性,以便于对下套管作业中的摩擦阻力进行预测,以微分几何理论为基础,建立了井孔轴线上的井斜角、方位角与自然坐标系各单位矢量的几何关系,得到了用井斜角和方位角的变化率表示的曲率和扭率,并提出了对测斜数据进行插值和光顺化处理的方法。
The geostress are used to study the borehole stability in Intercampo B 2 X reservoir, Venerz.
建立了地理坐标系下钻井稳定性力学模型 ,并形成了相应的分析软件系统 ,利用实际测量的地应力结果具体研究了委内瑞拉Intercampo油田 B- 2 - X油藏的井孔稳定性特征。