单管环状掺水工艺节能优化研究  

Research on energy conservation and optimization of single- pipe annular water blending process

作　　者：马书岩 MA Shuyan(No.8 Oil Production Plant of Daqing Oilfield Co.,Ltd)

机构地区：[1]大庆油田有限责任公司第八采油厂

出　　处：《石油石化节能与计量》2024年第7期21-25,31,共6页Energy Conservation and Measurement in Petroleum & Petrochemical Industry

摘　　要：为实现单管环状掺水工艺的节能降耗,通过Pipesim软件建立掺水工艺流程,模拟了不同参数对回液温度和掺水总量的影响,得到了不同井口温度、不同地温条件对集油环临界产液总量的影响,并建立以掺水温度及掺水量为决策变量,以运行费用最低为目标函数的优化模型,通过引入惩罚函数对序列二次规划算法进行改进,实现决策变量的求解。结果表明:除产液量外,掺水量、掺水温度、井口温度和地温均与回液温度呈正相关;井口温度越低、地温越低,所需的集油环临界产液总量越大;当实际产液量大于临界产液总量时,可实现常温输送,无需掺水操作。工艺优化后全年总运行费用可减少29.6万元,其中水力费用减少了3.9万元,热力费用减少了25.7万元。In order to achieve energy conservation and consumption reduction in the single-pipe annular water blending process,the process flow is established through the Pipesim software,and the influences of different parameters on the liquid return temperature and the total amount of water mixing are simulated,which obtains the influence of different wellhead temperatures and different ground tem-peratures on the total amount of critical liquid production in the oil gathering ring.The optimization model with water blending temperature and water blending amount as decision variables and minimum operating cost as objective function is established,and the sequential quadratic programming algorithm is improved by introducing penalty function to realized the solution of decision variables.The results show that water blending amount,water blending temperature,wellhead temperature and the ground temperature are positively correlated with the temperature of liquid return except the amount of liquid produced.The lower the wellhead temperature is,the lower the ground temperature is,the greater the required total critical liquid production of the oil gathering ring is.When the actual liquid production is greater than the total critical liquid production,it can be transported at normal temperature without water blending operation.After the optimization of process,the total annual operating cost can be reduced by 296000 yuan,among which the hydraulic cost can be reduced by 39000 yuan and the thermal cost can be reduced by 257000 yuan.

关 键 词：单管环状掺水 掺水温度 掺水量 目标函数 约束条件 

分 类 号：TE89[石油与天然气工程—油气储运工程]