射孔完井出砂预测新模型及其在射孔优化中的应用

分析了射孔完井的油层出砂机理，以线弹性理论为基础，考虑变温应力和流体渗流作用的拖曳力影响，建立了一种新的射孔完井出砂预测模型。应用该模型研究射孔方位、射孔参数对油井出砂的影响，结果表明，深穿透射孔弹比大孔半径射孔弹能更好地避免孔道出砂，采用定向射孔能有效地减少油井出砂问题。其结果对砂岩油藏射孔优化设计具有一定指导意义。

New Model of Forecasting Sand Entry of Perforated Well and Its Application in Perforation Optimized Design

After analyzing the mechanism of the sand entry of perforated well, based on the theory of linear elasticity and considering the effect of temperature-change stress and drag force of the fluid flow through porous medium, a new model for forecasting the sand production of perforated well is established. Through analyzing real well, it indicates that computational solution is more coincide with the reality. Using this model, the effect of perforation position and perforating parameter are researched. The result shows that deep penetrating BLTS is better than large size BLTS to avoid the sand production of pore passage, and oriented perforating is effective to diminish the sand production. There is some directive sense for. The conclusions are instructive in the perforation optimized design of sandstone reservoir.