【摘要】 从纤维增强树脂涂敷砂强度的机理入手,首先对单根纤维的压应力进行力学分析,构建了单纤维微元体的压应力力学模型,然后对影响短纤维受力的因素进行分析,采用半经验法确定单向平行短纤维增强复合砂体的工程常数,对理论预测公式进行修正,并引入纤维分布方位因子,建立了考虑流体剪切冲刷的随机取向短纤维增强砂体强度的预测模型。利用该模型得到了纤维复合体极限强度与临界产量的关系,从而为优化纤维加入量以及合理控制开井后的生产制度提供了理论指导。更多还原

【Abstract】 Considering the mechanism of fiber reinforcing resin-coated sand intensity,the compression stress on single fiber was analyzed,and the mechanical model of single fiber infinitesimal element was developed.Then,the affecting factors of stress on cut fibers were analyzed,and the theoretical forecast formula was amended on the basis of engineering constants of unidirectional parallel cut fibers reinforcement sand complex ascertained by adopting semi-thumb rule.The intensity prediction model of random orientation fiber reinforcement complex was presented considering the erosion effect of fluid on fiber-complex.The relation between fiber-complex intensity extremum and critical yield could be found,and theory guidance could be provided for optimization addtion of fiber to resin-coated sand and optimization and control of production regulations after well opening.更多还原