Considering the complicated interactions between temperature, pressure and hydration reaction of cement, a coupled model of temperature and pressure based on hydration kinetics during deep-water well cementing was established. The differential method was used to do the coupled numerical calculation, and the calculation results were compared with experimental and field data to verify the accuracy of the model. When the interactions between temperature, pressure and hydration reaction are considered, the calculation accuracy of the model proposed is within 5.6%, which can meet the engineering requirements. A series of numerical simulation was conducted to find out the variation pattern of temperature, pressure and hydration degree during the cement curing. The research results show that cement temperature increases dramatically as a result of the heat of cement hydration. With the development of cement gel strength, the pore pressure of cement slurry decreases gradually to even lower than the formation pressure, causing gas channeling; the transient temperature and pressure have an impact on the rate of cement hydration reaction, so cement slurry in the deeper part of wellbore has a higher rate of hydration rate as a result of the high temperature and pressure. For well cementing in deep water regions, the low temperature around seabed would slow the rate of cement hydration and thus prolong the cementing cycle.

考虑到水泥的温度，压力和水化反应之间复杂的相互作用，建立了基于深水固井过程中水化动力学的温度和压力耦合模型。采用微分方法进行了数值耦合，并将计算结果与实验数据和现场数据进行了比较，验证了模型的准确性。考虑温度，压力和水合反应之间的相互作用，所提出模型的计算精度在5.6％以内，可以满足工程要求。进行了一系列数值模拟，以找出水泥固化过程中温度，压力和水合度的变化规律。研究结果表明，由于水泥水化热，水泥温度急剧上升。随着水泥胶凝强度的发展，水泥浆的孔隙压力逐渐减小，甚至低于地层压力，引起气体窜流。瞬态温度和压力会影响水泥水化反应的速度，因此，高温和高压会导致井筒深部的水泥浆具有更高的水化速度。对于深水区的固井，海床周围的低温会减慢水泥的水化速度，从而延长固井周期。瞬态温度和压力会影响水泥水化反应的速度，因此，高温和高压会导致井筒深部的水泥浆具有更高的水化速度。对于深水区的固井，海床周围的低温会减慢水泥的水化速度，从而延长固井周期。瞬态温度和压力会影响水泥水化反应的速度，因此，高温和高压会导致井筒深部的水泥浆具有更高的水化速度。对于深水区的固井，海床周围的低温会减慢水泥的水化速度，从而延长固井周期。