高压含气条件下含蜡原油析蜡点测量方法

Measurement method for wax appearance temperature of waxy crude oil under high-pressure and gas-bearing

 聂向荣¹ 杨胜来²

 （1．陕西延长石油（集团）有限责任公司研究院，陕西 西安 710075 中国石油大学（北京）石油工程教育部重点实验室，北京 102249）

Research Institute, Shaanxi Yanchang Petroleum (Group) Co. Ltd., Xi′an 710075, China College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China)

 针对常规方法只能测量地面脱气油的析蜡点，不能测量高压含气条件（油藏条件）下含蜡原油析蜡点的不足，提出了以Arrhenius方程为理论基础，利用高压毛细管黏度计测量高压含气条件下含蜡原油析蜡点的方法。实验结果表明，实验油样地面脱气后析蜡点为63.74 ℃，油藏条件下析蜡点为59.73 ℃，含蜡原油地面脱气后更容易析蜡。建议采用油藏条件下的析蜡点作为注水设计参数。

 Normal methods can only measure wax appearance temperature(WAT) for dead oil, which cannot measure the WAT under high-pressure and gas-bearing condition (reservoir condition). In order to solve this problem, a method, which is based on Arrhenius equation and high-pressure capillary-viscometer, is proposed. The results show that the WAT of stock tank oil is 63.74 ℃, while the WAT is 59.73 ℃ at reservoir condition. The wax of stock tank oil is more likely to appear than that at reservoir condition. It is suggested that the WAT at reservoir condition be chosen as a parameter for water flooding development design.

10.6056/dkyqt201603026