Perforated wells in ultra-deep sandstone reservoirs are characterized by high reservoir temperature, high formation pressure, and high production, and sand production will cause severe safety hazards to these wells. Based on Drucker-Prager (DP) rock failure criterion, a practical analytical model for predicting critical drawdown pressure (CDP) of sanding onset for perforated wells is established by comprehensively considering the influence of drag stress, formation water production, reservoir pressure depletion, temperature difference in the perforated wellbore. The proposed model is verified by field sanding onset monitoring data. The calculation results show that CDP changes with well inclination, and it decreases with the increase in wellbore temperature difference, reservoir pressure depletion, and water saturation. However, the CDP increases with the number of perforations and the ratio of diameter to length. The optimization of perforation parameters has an important influence on sand control. This study can effectively guide the prediction of CDP and provides basis for efficient and safe development of similar ultra-deep and high yield sandstone reservoirs.

中文翻译：

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超深层高温高压射孔井出砂临界压降预测

超深层砂岩储层射孔井具有储层温度高、地层压力高、产量高的特点，出砂会给这些井带来严重的安全隐患。基于Drucker-Prager(DP)岩石破坏准则，综合考虑拖曳应力、地层产水、储层压力枯竭、温度等因素的影响，建立了预测射孔井出砂临界压降压力(CDP)的实用分析模型。射孔井筒的差异。所提出的模型通过现场出砂开始监测数据进行了验证。计算结果表明，CDP随井倾角变化，随井筒温差、储层压力枯竭和含水饱和度的增加而减小。然而，CDP随着穿孔的数量和直径与长度的比值而增加。射孔参数的优化对防砂有重要影响。该研究可有效指导CDP预测，为同类超深高产砂岩储层高效安全开发提供依据。