模拟深水井筒中流速对传热影响的实验研究

Experimental study on influence of flow velocity on heat transfer in simulated deepwater wellbore

马永乾 赵欣欣 邵茹 刘晓兰 宋荣荣

中国石化集团胜利石油工程有限公司钻井工艺研究院，山东 东营 257017 中国石油大学（华东）石油工程学院，山东 青岛 266580

Research Institute of Drilling Technology, Shengli Petroleum Engineering Co. Ltd., SINOPEC, Dongying 257017, China College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China

为研究深水低温环境下油气开发过程中井筒内的传热规律，提高深水低温环境井筒内温度的计算精度，以深水油气流动模拟实验系统中的低温冷却传热实验装置为平台，进行了模拟深水低温环境下的冷却传热实验和气液两相流传热实验。根据对流传热准则方程，数据回归得到深水低温情况下的模拟井筒内对流传热关系式。实验结果表明，在模拟深水低温环境下，流体管内对流传热系数主要受流速的影响，且层流时流速对传热的影响更明显；气液两相流时，不同流型管内对流传热系数不同的根本原因是各流型流动结构不同，液体流速是影响传热的主要因素。

In order to study the heat transfer law of wellbore in the process of oil and gas development in deepwater and low temperature environment, and enhance the calculation accuracy of temperature in wellbore, the cooling heat transfer experiment and the oil-gas two-phase flow heat transfer experiment in simulated deepwater environment were done taking the cryogenic cooling heat transfer experiment device in deepwater oil and gas flow simulation experiment system for the platform. Based on the rule equation of convective heat transfer, data was regressed to get the relational expression of convective heat transfer in simulated wellbore at the deepwater and low temperature conditions. The experiment results show that at the simulated deepwater and low temperature conditions, convective heat transfer coefficient is mainly affect by flow velocity, and the influence of flow velocity on heat transfer is more obvious in laminar flow. When gas-liquid two-phase flow is different, the law of convective heat transfer in flow pattern tube is also different, whose basic reason is that the structure of each flow pattern is different. Liquid velocity is the main factor influencing the heat transfer.

10.6056/dkyqt201405024