热采水平井注多元热流体水平段传质传热模型

Mathematical modeling of mass and heat transfer process for multi-component thermal fluid injection wells

 孙逢瑞 姚约东 李相方 邹明 丁冠阳 张逸

 （中国石油大学（北京）石油工程学院，北京 102249）

(College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China)

 以裸眼完井水平井注过热型多元热流体为研究对象，通过引入过热型多元热流体各组分热物性参数实验数据，利用质量、动量和能量守恒方程，建立了裸眼完井水平井注过热型多元热流体传质传热模型。在模型验证的基础上，研究了非凝结气质量分数、注汽速度和注汽温度对热物性参数分布的影响。研究表明：随着非凝结气质量分数增加，井筒内同一位置流体温度和过热度均减小；随着注汽速度增加，井筒内同一位置过热度不断升高；跟端注汽温度升高，沿程吸汽量减少，过热度增加。模型对于矿场分析裸眼水平井传质传热规律、优选注汽参数具有重要指导意义。

 Taking the multi?-component thermal fluid(MCTF) injection process in the horizontal wellbore as the research object, by introducing the experimental data of thermophysical properties of MCTF, a model comprised of mass, momentum and energy equations was established. Based on the validated model, the effects of non-condensing gas content, injection rate and injection temperature on the distribution of thermos-physical parameters were conducted. The results show that both the temperature and superheat degree at a certain place of the wellbore decrease with the increase of the content of the non-condensing gas; superheat degree increases with the increase of injection rate; the superheat degree increases and the steam absorption along the way decreases with the increase of injection temperature. The novel model presents some important guide lines for oilfield to analyze the heat transfer characteristics as well as optimization of steam injection parameters.

10.6056/dkyqt201702027