热流体循环在超深井中的应用

Application of hot fluid circulation to ultra-deep well

针对塔河稠油油藏超深的特点,对传统的热流体循环工艺加以改进,将加热点从井底向上移,使热流体部分加热原油。建立了该方法分析井筒温度分布的数学模型,并进行求解。通过分析影响井筒温度参数的敏感性,优化出热流体循环的运行参数。该方法能够有效解决热流体循环工艺在超深稠油井中所遇到的困难,有效利用了能量,并达到较好的加热效果。

In view of the ultra-deep feature of TaHe heavy oil reservoir, traditional hot fluid circulation technique was improved, in which heating point moved upward from bottom hole so that hot fluid could heat part of crude oil. This paper develops the mathematical model of wellbore temperature distribution and solves it. By analyzing sensitivity of the parameters influencing wellbore temperature, optimal operation parameters of hot fluid circulation are obtained. Field practice shows that the new technology can effectively solve the problems existed in hot fluid circulation technique used in ultra-deep heavy oil well, with effective utilization of energy and preferable heating effect.