针对深水井B、C环空流体固相沉积下环空泄压通道堵塞风险，开展常见深水钻井液体系固相沉积测试，获得不同钻井液体系固相沉降高度及沉降后固相渗流特性，并基于固相渗流特性参数，考虑环空流体固相沉积影响，建立渗流作用下环空带压预测分析方法，并开展实例分析。结果表明：沉降高度油基钻井液> EZFLOW钻井液> HEM钻井液，沉降后固相渗透率EZFLOW钻井液> HEM钻井液>油基钻井液，渗透率最高达到2.216 μm²，在环空流体固相沉积条件下，随环空流体黏度降低及地层渗透率、裸眼段长度增加，流体流动黏性力降低，且与地层接触渗流面积增大，环空流体渗流量增大，降低钻井液流体黏度、提高水泥环裸眼段长度可以提高深水井B、C环空压力释放能力，但由于固相沉积影响，其渗流流量远小于无固相沉积条件下环空压力降低速度，且固相沉降后存在无法泄压的风险。

To mitigate the risk of annular pressure buildup caused by solid-phase deposition in the B and C annuli of deep-water wells, experimental tests were conducted on sedimentation behavior using common deep-water drilling fluid systems. The sedimentation height and post-settling solid-phase permeability of various drilling fluids were measured. Based on the parameters of solid phase percolation characteristics, and considering the impact of annular fluid solid deposition, a predictive analytical method was established for annular pressure under percolation conditions. Case analysis was conducted to validate the approach. Results show that the sedimentation height follows the order: oil-based drilling fluid > EZFLOW drilling fluid > HEM drilling fluid. In contrast, the post-settling solid-phase permeability is ranked as EZFLOW drilling fluid > HEM drilling fluid > oil-based drilling fluid, with a maximum permeability of 2.216 μm². Under annular fluid solid-phase deposition conditions, reductions in annular fluid viscosity, increases in formation permeability, and longer open-hole cement sheath sections reduce fluid viscous resistance, enlarge the seepage contact area with the formation, and enhance fluid flow. Therefore, reducing drilling fluid viscosity and extending the open-hole cement sheath length can improve the pressure release capacity in the B and C annuli of deep-water wells. However, the presence of solid-phase deposition significantly restricts seepage flow rates compared to conditions without deposition, leading to a potential risk of incomplete pressure relief following solid-phase sedimentation.