高含硫气田地面集输系统元素硫沉积化学防治一体化新技术  

New chemical prevention-control integrated technology for elemental sulfur deposition in surface gathering and transportation systems of high-sulfur gas fields

作　　者：熊钢[1,2,3,4,5] 刘云峰 唐永帆[1,4] 徐晓炜[4] 江藩 李伟 兰云霞[4,6] 李宏[4,6] 肖毅 XIONG Gang;LIU Yunfeng;TANG Yongfan;XU Xiaowei;JIANG Fan;LI Wei;LAN Yunxia;LI Hong;XIAO Yi(Natural Gas Research Institute,PetroChina Oil&Gasfield Compang,Chengdu,Sichuan 610041,China;National Energy R&D Center for High Sulfur Gas Reservoirs Chengdu,Sichuan 610051,China;CNPC High Sulfur Gas Reservoir Exploitation Pilot Test Base,Chengdu,Sichuan 610213,China;PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan 610051,China;Key Laboratory of Natural Gas Quality Control and Energy Measurement for State Market Regulation,Chengdu,Sichuan 610299,China;CDB Operating Company,PetroChina Southwest Oil&Gasfield Company,Dazhou,Sichuan 635000,China;Northwest Sichuan Division of PetroChina Southwest Oil&Gasfield Company,Jiangyou,Sichuan 621700,China)

机构地区：[1]中国石油西南油气田公司天然气研究院,四川成都610213 [2]国家能源高含硫气藏开采研发中心 [3]中国石油高含硫气藏开采先导试验基地 [4]中国石油西南油气田公司 [5]国家市场监督重点实验室(天然气质量控制和能量计量) [6]中国石油西南油气田公司川东北作业分公司 [7]中国石油西南油气田公司川西北气矿

出　　处：《天然气工业》2024年第11期149-160,共12页Natural Gas Industry

基　　金：中国石油西南油气田公司科技项目“高含硫气藏单质硫沉积形成机理及预防管控措施研究”(编号:20230305-04)。

摘　　要：随着高含硫气田的不断开发,气田地面集输系统不可避免地会出现元素硫沉积堵塞问题。采用停产浸泡硫溶剂循环清洗解堵,面临着稳产周期短、清洗频繁、综合治理成本较高等挑战。为此,基于化学预防-治理相结合的理念,分别开展了停产浸泡硫溶剂循环解堵技术及不停产在线加注硫溶剂预防堵塞技术的研究,完成了配方设计、验证和现场试验,提出了防治一体化方案。研究结果表明:①研发的复合胺高效硫溶剂(CTS-1),较优使用温度为40~60℃,较优清洗时间为1~2 h,饱和溶硫量达45.72 g/100 mL,溶硫能力显著提升,且具有刺激性气味弱、微毒、腐蚀性低等优势,在四川盆地罗家寨气田LJ11H井成功开展了溶硫解堵试验;②创新性提出了不停产在线加注硫溶剂预防元素硫堵塞的技术思路,明确了在线加注硫溶剂的“动态预防-实时溶解”双重作用机制,并针对性地形成了在线加注硫溶剂应用工艺方案;③研发了复合碱硫溶剂(CTS-2),在确保高溶硫能力的同时,有效溶硫时间大幅降低至15~20 min,且适应性良好、环境友好。结论认为:①化学防治一体化技术是有效解决高含硫气田地面集输系统元素硫沉积堵塞的有效手段,新研发的复合胺硫溶剂及复合碱硫溶剂可满足化学防治的技术需求;②下一步需要开展井筒-地面清洗一体化防治、在线加注化学药剂预防堵塞及化学药剂可重复利用等系统性攻关,实现高含硫气田地面集输系统元素硫沉积的长效防治,全面助力高含硫气田长期稳产和规模高效开发。With the continuous development of high-sulfur gas fields,elemental sulfur deposition blockage is inevitable in the surface gathering and transportation systems of gas fields.The process of stopping the production and employing sulfur solvent immersion for cyclic cleaning and blockage removal is faced with the challenges of short stable production cycle,frequent cleaning and high comprehensive treatment cost.Based on the concept of chemical prevention–treatment integration,this paper studies the off-production sulfur solvent immersion for cyclic blockage removal technology and the on-production on-line sulfur solvent injection for blockage prevention technology respectively,performs formula design,verification and field test,and puts forward prevention-control integrated plan.The following results are obtained.First,the serotonin based efficient sulfur solvent(CTS-1)has the optimal operating temperature of 40–60℃,the optimal cleaning time of 1–2 h,and the saturated dissolved sulfur content of 45.72 g/100 mL,indicating a significantly improved sulfur dissolution capacity,and it has the advantages of weak pungent smell,slight toxicity and low corrosion.It has been successfully applied in the sulfur dissolution and removal in Well LJ11H of Luojiazhai Gas Field in the Sichuan Basin.Second,the technical idea of on-production on-line sulfur solvent injection for elemental sulfur blockage prevention is put forward innovatively,the"dynamic prevention–real time dissolution"mechanism of on-line sulfur solvent injection is clarified,and the application process plan of on-line sulfur solvent injection is prepared specifically.Third,the composite alkali based sulfur solvent(CTS-2)technology reduces the effective sulfur dissolution time significantly to 15–20 min while ensuring the high sulfur dissolution capacity,and exhibits good adaptability and environmental friendliness.In conclusion,the chemical prevention–control integrated technology can effectively solve the elemental sulfur deposition blockage in the su

关 键 词：高含硫气田 元素硫沉积 化学防治 一体化技术 在线加注 硫溶剂 

分 类 号：TE375[石油与天然气工程—油气田开发工程] TE39