基于NSGA_Ⅱ的地下储气库注气节能优化运营研究  

Optimization of energy-saving operation in underground gas storage injection based on NSGA_Ⅱ

作　　者：刘佳宁[1,2] 刘得军[1,2] 钱步仁[1,2] 翟颖[1,2] 冯牧群 Liu Jianing Liu Dejun Qian Buren Zhai Ying Feng Muqun(State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China College of Geophysics and Information Engineering, China University of Petroleum, Beijing 102249, China)

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室 [2]中国石油大学(北京)地球物理与信息工程学院

出　　处：《天然气工业》2017年第1期160-166,共7页Natural Gas Industry

基　　金：国家自然科学基金项目"地下管线磁异常三层分量联合反演成像探测新方法研究"(编号:41374151)

摘　　要：地下储气库具有储气量大、安全系数高等诸多优势,已成为天然气管网不可或缺的终端配套设施。其运营是一个涉及经济效益、运营风险、工作效率等因素的多目标问题,因而提出符合多方面要求的注气配产方案以达到降低压缩机能耗、降低运营成本的目标是储气库节能优化运营的核心。为此,基于地下储气库地上地下压力系统一体化仿真模型,综合环境条件、地质条件、安全压力等因素对储气库运营的影响,以单井注气流量为变量,根据管道级别确立双层目标函数,结合实际生产要求设置约束条件,应用NSGA_Ⅱ算法制订了注气配产方案,最后对上述方案进行了生产优化分析。两组实验结果均表明:利用NSGA_Ⅱ算法制订的注气配产方案合理有效,在满足生产要求的同时,也兼顾了地质环境、安全运营等条件,同时压缩机功耗较经验配产情况下降低40%以上,大幅减少了能源浪费。With many advantages like huge gas storage capacity, reliable safety factor, etc., underground gas storage （UGS） has become one indispensable terminal facility in natural gas pipeline network. However, because UGS operation is a multi-objective issue related to economic benefit, working risk and efficiency, etc., it is helpful to make a rational injection and production scenario for the gas injection cycle of the underground gas in order to lower the power consumption of compressors thereby to reduce operating costs in the end. In view of this, based upon the integrated simulation model of underground and above-ground pressure system of gas storages, taking into account such impacts of factors as environmental situation, geological conditions, safety factors, etc. a dual objective function was established according to the pipeline levels, with the single-well gas injection quantity as the variable. Then, the non-dominated sorting genetic algorithm Ⅱ （NSGA Ⅱ） was applied to make a gas injection and production scheme with the actual production requirement as a constraint condition. Finally, an optimal analysis was conducted of the above scheme. Results show that the NSGA_Ⅱ-based scheme is reasonable and efficient, not only meeting the production requirement but considering such conditions as geological environment, safe- ty operation, etc. This scheme also helps reduce the energy consumption of compressors by above 40% and as a result, significantly cut down the energy waste.

关 键 词：地下储气库 注气配产方案 压力系统一体化 仿真模型 压缩机 NSGAⅡ 优化配产 降耗 

分 类 号：TE972.2[石油与天然气工程—石油机械设备]