Pilot test area of YanChang gas field YQ2-Y128 well area had some problems af-ter completion.Pressure of wellhead equipments and ground gas gathering pipelines were too high and security risk was existed. It was easy to generate hydrate and methanol injection amount was large. The gathering radius was too small and gas gathering station and perma-nent occupancy of arable land was too much. Aiming to above problems, optimization and innovation of surface engineering gathering and transportation technology had been done. The new system is more suitable for YanChang gas field after optimization,and the gas radius increased by 1.4 times, the number of gas wells into single gas station increased 2.3 times, 8 gas gathering stations and about 15% of land area were reduced, more than 20% of the oper-ating cost was cut down, the length of the single well gas pipeline is reduced by 50%, the pipeline engineering quantity is reduced by 54.6%, the single well injection methanol re-duced 50%,the efficiency of single injection methanol pump increased by about 150%,proj-ect investment reduced 0.28 billion yuan and single well ground engineering investment was reduced by 42.3%. In 2014,the project successfully put into production. The system runs safely and smoothly at present.%延长气田延气2-延128井区先导试验区建成投产后存在井口设备和地面集输管线承压高、安全风险大；容易生成水合物、注醇量大；集气半径小、单个集气站纳入井数少、站点多和永久占地多等问题。针对存在问题，对续建的一期地面集输工艺进行了优化和创新，提高了集输工艺技术的适用性。优化后，集输站集气半径增加1.4倍，单个集气站纳入井数增加2.3倍，集气站数量减少8座，集气站减少用地面积约15%，运行费用降低20%以上；平均单井采气管线长度减少50%以上，管线工程量减少54.6%；单井注醇量减少50%，单台注醇泵注醇效率提高约150%。地面集输工程投资降低了2.8亿元，单口气井地面工程投资降低42.3%。2014年工程项目顺利投产，目前系统安全平稳运行。
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