稠油油井幂律流体流动视黏度模型  

Apparent viscosity model of power law fluid flow in heavy oil wells

作　　者：李阳[1] 张凯[1] 王亚洲[2] 王琳娜[2] 

机构地区：[1]中国石油大学(华东)石油工程学院 [2]中国石化胜利油田滨南采油厂

出　　处：《石油勘探与开发》2007年第5期616-621,共6页Petroleum Exploration and Development

基　　金：中国石油天然气勘探开发公司"典型油田开发调整技术研究与部署"(HWZX0502)

摘　　要：与常规油井相比，稠油油井产出液黏度较高，致使生产过程中出现泵效较低、悬点载荷变化大和调参困难等问题。针对稠油抽油机井举升过程，选用胜利油田5口油井产出稠油，通过实验分析其在35～100℃温度下的流变性，用幂律模式回归稠油幂律指数与稠度系数随温度变化的经验计算公式。以非牛顿流体流变学理论和人工举升理论为基础，按照不同的流动规律，给出稠油油井从地层到井口垂直井筒流动的运动方程和边界条件，并对其进行求解，最终得到视黏度模型。应用结果表明，该模型能够提高设计结果的精度，为稠油油井的优化设计及参数调整提供理论参考。The viscosity of liquids produced from heavy oil wells is higher than that from regular oil wells. It causes problems in the process of heavy oil production, such as low pump efficiency, high changeability of suspending loads, and the difficulty in adjusting parameters. To solve the problems, rheology of heavy oil from 5 wells in the Shengli Oilfield is researched through experiments under 35-100~C as to the whole process of artificial lift. Experimental formula regressed by the power-law model shows the relationship that power-law index and consistency coefficient vary with temperature. According to different flow rules from bottom hole to wellhead, equations of motion and boundary conditions in vertical well-bores are set up on the basis of the non-Newtonian fluid rheology and artificial lift theory. A model of apparent viscosity is put forward by solving above equations. The application result shows that this model is conducive to improve design precision of rod-pumped wells with heavy oil.

关 键 词：稠油 视黏度模型 垂直井筒 幂律模式 运动方程 

分 类 号：TE345[石油与天然气工程—油气田开发工程]