随着开发年限的增长,新场气田气井压力下降较快,部分气井压力已接近管网输送 压力,现有集输系统压力级制不再适用,原有天然气脱水工艺效果变差,影响了外输天 然气质量。因此,增压开采是保证气田稳产的重要措施。目前,一期增压方案已完成了 袁家增压站的建设投产。但随着井口压力继续降低,袁家增压站的增压工艺、规模和天 然气脱水工艺将不再适用。本次研究通过对气田现有集输工艺和地面管网现状进行调 查,分析了气田开发及地面工艺所面临的主要问题,在国内外同类气田后期增压工艺调 研结果的基础上,获得了如下研究成果: (1)对袁家井区进行增压开采拟采用井区整体增压开采较为适宜,采用整体增压 幵采共有57 口气井分步进入增压开采。 (2)通过增压集输,气井废弃压力可由6.28MPa下降为5.02MPa,气田增加可采 储量1.438xl08m3,单井可增加采储量252.29xl04m\井区采收率可提高6.68个百分点。 (3)井区目前一级增压气井日产量接近14.75xl04m3; 二级增压气井日产量接近 19.07xl04m3,三级增压量为前者之和。增压站设置配气规模为20xl04m3/d的往复式天 然气压缩机组共2台,15xl04m3/d的往复式天然气压缩机组1台,2用1备,利用己建 压缩机能满足三级压缩需求,且有一定预留,后期可保证一用一备。 (4)根据外输气质实际要求,站内脱水露点降约为45°C,木文釆用三甘醇法脱水 法,在站内设置两台TEG脱水撬,处理规模分别为80xl04:m3/d和50><104m3/d。 (5)该方案税后财务内部收益率为12.32%,税后投资回收期为5.56年,税后财务净现值为66万元,税前财务内部收益率为16.71%,税前投资回收期为4.76年,税前财 务净现值为958万元,各项指标均能满足行业基准要求。 (6)通过对增压开采方案的分析,可以看出扩建增加站对袁家区块的持续、稳定 生产是必要的,工艺上和经济上是可行的。 关键词:气田增压,脱水,工艺设计,可行性研究 Abstract With the growth of gas field development,Xin Chang gas well pressure drop quickly, and even some gas wells pressure is closed to the pipeline pressure. The existing pressure level of transportation system is no longer applicable, and the dehydration effect of original natural gas is poor,affecting the quality of natural gas pipeline.Therefore, supercharging is an important measure to ensure stable production of gas field. At present, pressurization scheme one has completed the construction of a booster station put into operation. But with the wellhead pressure continuing to decrease, Yuan Jia supercharging process, scale and the dehydration process of natural gas will no longer be applied. Through the study of process and the ground pipe network of field currently, analyzing the main problems about the process of gas field development,based on the research results about similar gas field late at home and abroad supercharging process,and the research results are as follows: (1) Well area supercharging overall is more suitable for the Yuan Jia area, and 57 wells will be stepped into supercharging. (2) Through supercharging transportation, the abandoned pressure of gas well can be decreased from 6.28MPa to 5,02MPa,and gas field increase recoverable reserves of 1.438><108m3, single well can increase the recoverable reserves of 252.29x104m3, and the recovery rate can be increased by 6.68 percentage points in well area. (3) Currently, a turbocharged production in well area is closed to 14.75 x104m3; two stages turbocharged production is closed to 19.07><104m3three stages turbocharging is the sum of the first and the second. With the built compressor meeting the needs of three stages compressor, there is a certain reserve, and guaranting with a prepared. (4) According to the actual requirements of transporting gas quality, the dehydration dew drop of station is about 45 °C.This paper adopts three glycol dehydration method, seting up two sets of TEG dehydration lever in the station, and the processing scale are 80><104m3/d and 50><104m3/d. (5) After paying the tax, financial internal rate of return of the plan is 12.32%, and the payback period is 5.56 years, financial net present value of 660000 yuan. Before paying the tax, financial internal rate of return of 16.71%, the payback period is 4.76 years, financial net present value is 9580000 yuan, and all indexes can meet the requirements of industry benchmark, and the plan is economically feasible. (6) Through the analysis of the pressurized exploitation scheme,it is necessary to expand booster station for the continuous, stable production of Yuan Jia block, and the program is technically and economically feasible. Key words: gas field supercharging, dehydration, process design, feasibility study 目录 第1章绪论 1 1.1 研究背景 1 1.2研究目的及必要性 1 1.2.1研究目的 1 1.2.2研究的必要性 1 1.3 国内外研究现状 2 1.3.1增压模式 2 1.3.2典型气田后期增压范例 4 1.4主要研究内容及成果 5 1.4.1主要研究内容 5 1.4.2报告取得研究成果 6 第2章新场一孝泉气田建设现状及存在问I紛析 8 2.1 气田建设现状 8 2.1.1气田幵采现状 8 2.1.2袁家区块已增压气井生产状况 10 2.1.3集输管网现状 12 2.2气田生产所面临的主要问题 14 2.2.1气田销售所面临的问题 14 2.2.2气田生产目前所面临的问题 14 2.3 气田开采应采取的对策 17 2.4 气田增压的特点 17 2.5 气田增压开采的有利条件 18 第3章气田增压时机与増压范围 19 3.1 气田气井增压时机预测 19 3.2 气田增压范围的确定 21 第4章增压开采后可采储量计算与分析 23 4.1不同开采方式下废弃地层压力分析 23 4.2 气田可采储量分析 24 4.3增压幵采产能预测 27 第5章增压开采地面集输方案研究 29 5.1 增压站布局方案 29 5.1.1增压站点的选择 29 5.1.2工程投资 31 5.1.3增压工况分析 31 5.2增压设备选择 32 5.2.1增压机组类型选择 32 5.2.2增压机组动力选择 34 5.3增压机组主要工艺参数的确定 34 5.3.1增压站装机容量 34 5.3.2增压级数的确定 35 5.3.3压缩机功率的确定 35 5.3.4压縮机机组选型 36 5.3.5机组消耗指标 37 5.4脱水工艺流程 37 5.5脱水增压站工艺流程 38 5.6脱水增压站平面布置 38 第6章配套工程 40 6.1 自动控制 40 6.1.1设计原则 40 6.1.2设计ft容 40 6.1.3自动控制方案 40 6.1.4主要的设备和材料 42 6.2通信工程 42 6.2.1通信方案 42 6.2.2主要工作量 43 6.3给排水及消防 44 6.3.1给水设计 44 6.3.2排水设计 44 6.3.3消防设计 45 6.3.4主要工作量 45 6.4供配电工程 46 6.4.1设计原贝丨J 46 6.4.2供配电设计 46 6.4.3通用设计要求 48 6.4.4节能措施 49 6.4.5电气设备的防电伤的措施 49 6.4.6主要工程量 49 6.5 建筑与结构 50 6.5.1设计原则 50 6.5.2设计使用条件 50 6.5.3设计荷载取值 51 6.5.4设计范围 51 6.5.5结构设计 51 第7章环境保护、职业安全卫生和节能 53 7.1 环境保护 53 7.1.1环境保护概况 53 7.1.2影响分析 53 7.1.3防治对策 53 7.2 职业安全和卫生 54 7.2.1遵循的规范 54 7.2.2主要不安全因素及防护措施 54 7.3 55 第8章组织机构、定员和人员培训 56 8.1 组织机构禾口定员 56 8.2 人员培训 56 第9章投资估算及经济评价 57 9.1 57 9.2投资佔算及资金筹措 57 9.2.1投资佔算 57 9.2.2资金筹措 57 9.3 财务评价 58 9.3.1编制依据 58 9.3.2基础数据 58 9.3.3成木和费用佔算 58 9.3.4财务分析 59 9.3.5不确定性分析 60 9.3.6经济风险分析 61 9.3.7经济评价结论 61 第10章报告研究结论 62 m. lit 63