长庆油田伴生气凝液回收工艺运行现状与优化

Process operation status and optimization of condensate recovery from associated gas in Changqing Oilfield

2018年以来长庆油田一直采用DHX(Direct Heat Exchange)工艺进行伴生气凝液的回收利用,单套装置的C_(3)^(+)收率已经基本达到95%,但在运行中仍暴露出部分装置的C_(3)^(+)收率达不到既定目标、混合冷剂制冷机过大的问题。针对以上问题,利用Aspen HYSYS V12.0软件对DHX工艺进行了分析与优化。优化后的DHX工艺不但确保了各种类型伴生气凝液回收装置的C_(3)^(+)收率高于既定目标95%,且有效降低制冷机功耗约20%~35%。研究结果可为已建伴生气凝液回收装置提产增效改造和新建伴生气凝液回收装置的设计提供基本依据。

DHX(Direct Heat Exchange)process has been used for condensate recovery in Changqing Oilfield since 2018,and the C_(3)^(+) yield of each train of process facilities has basically reached 95%.But there are still some problems in the operation,such as C_(3)^(+) yield of certain facilities cannot meet the target and the power consumption of operating the mixed refrigerant refrigeration system is excessive.To resolve these problems,this paper analyzed and optimized the original DHX process by using Aspen HYSYS V12.0 software.The optimized DHX process ensures that the C_(3)^(+) yield of various types of condensate recovery facilities is higher than the established target of 95%,and can effectively reduce the energy consumption of the refrigeration system by about 20%~35%.The research results can provide a design basis for the production capacity and efficiency improvement of the existing associated gas condensate recovery facilities and the design of the new associated gas condensate recovery facilities.