Abstract
Sucker rod pump lifting technology development is currently the most widely used, the most mature, the most complete supporting facilities. In the sucker rod pump lifting system of heavy oil, the larger of sucker rod and the friction liquid is one of the important factors that affect the lifting system. The friction between sucker rod and the liquid is needed to be accurately calculated in the scientific design of rod string matching. In this paper, friction between sucker rod and the liquid is the research object. The practical problems for the properties of the heavy oil which is changed with the temperature abnormally higher than the conventional crude oil. Temperature and pressure in the wellbore which effect on the viscosity of heavy oil is further researched. The calculation model of the wellbore temperature field and pressure field distribution is established. Furthermore, we put forward a set of suitable calculation model of the friction between sucker rod and the liquid in the sucker rod pump lifting system for heavy oil. At the same time, Using visual c # language programme computing software is compiled and generates the heavy oil viscosity curve which changed with various factors. On the basis of the work performed, the data of more than 500 Wells is calculated successfully. The results show that model prediction accuracy is higher than the normal model (Relative errors are less than 8%).
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