蒸汽吞吐水平井加热半径计算新模型  

Amathematical Model for Heating Radius Along Horizontal Well of Cyclic Steam Stimulation

作　　者：孙群[1] 黄世军[1] SUN Qun HUANG Shi-jun(China University of Petroleum, Beijing 102249, China)

机构地区：[1]中国石油大学(北京),北京102249

出　　处：《北京石油化工学院学报》2016年第4期8-12,共5页Journal of Beijing Institute of Petrochemical Technology

基　　金：国家科技重大专项(2011ZX05024-005-006)

摘　　要：基于水平段热物性参数计算模型,利用非活塞式水驱油理论和保角变换理论将油藏内渗流与水平段管流进行耦合,建立了蒸汽吞吐水平井加热半径模型。研究了热物性参数、加热半径沿水平段的分布规律和不同影响因素对蒸汽干度、加热半径分布的影响。研究表明:加热半径沿水平段分布呈"U"型;注汽速度增加,热损失降低,加热半径基本不变;周期注汽量增加,热损失不变,加热半径增加;水平段长度增加,蒸汽干度沿程降低变缓,但指端蒸汽干度降低。该模型对阐明注蒸汽油藏内渗流规律,优化注汽参数具有重要意义。Based on estimation of thermos-physical parameters, calculation model of heating radius along horizontal well is established using B-L theory and conformal transformation. The heating radius distribution along horizontal well and how influence factrs affect heating radius are studied. The results showthat the distribution of heating radius along horizontal well is like ＂U＂; The heating radius is stable with the increase of injection speed; The heating radius increases with the increaseof the cyclic steam quality; the quality of saturated steam slows down in the decreasing process with the increase of well length, but the steam quality at well-toe decreases. The mathematical model has a significant effect on illustrating seepage flow in reservoir during steam injection, and on optimizing the steam injection parameters.

关 键 词：蒸汽吞吐 加热半径 理论模型 非活塞式驱替 水平井 

分 类 号：TE33[石油与天然气工程—油气田开发工程]