摘要
利用大庆油田储气库的地质资料,结合不同尺寸油管流体压力损失、携液能力、抗冲蚀能力等因素,优选出了合理的油管直径。预测了储气库天然气水合物的生成,给出了最优的水合物抑制剂加入配方及用量。研究结果表明,天然气注采能力随着油管直径和井口压力的增大而增大,50.8mm及以上尺寸油管能满足储气库注采气量要求。压力损失随着注采气量的增大而增大,但随着油管内径的增大而减小。63.5mm及以上尺寸油管的压力损失较小。综合分析选用63.5mm油管较为合理,同时可避免冲蚀和井底积液产生。在储气库运行条件下,油管内会生成天然气水合物,推荐采用加入抑制剂方法防止水合物生成,抑制剂采用甲醇和乙二醇体积比2∶3的复配体系,用量为0.03m3/d。
The reservoir condition moderate level of gas well was taken as an example to research the proper Tubing diameter in Daqing Oilfield gas storage.Predicted the generation of gas storage,and optimized the formulation and amount of inhibitor.The node analysis method was used to research gas production capacity,pressure loss,liquid carrying capacity and the erosion resistance on the diameter of tubing effect.The results showed that the ability to natural gas injection and production increase with the increasing tubing diameter and wellhead pressure.The gas storage injection-production volume requirements could be met,when the tubing diameter was more than 50.8 mm.The well bore pressure loss increase with the injection-production volume increases,but decrease with the increasing tubing diameter.The tubing pressure loss was less,when the tubing diameter was more than 63.5 mm.Comprehensive analysis the 63.5 mm tubing was more reasonable used in gas storage.Meanwhile,erosion and effusion could be avoided.When Production volume was very low,the tubing would generate natural gas hydrate.The adding method was recommended to prevent hydrate formation,the inhibitor was used methanol and ethylene glycol to the volume ratio of 2∶3,and the amount was 0.03m3/d.
出处
《石油化工高等学校学报》
CAS
2015年第2期73-76,90,共5页
Journal of Petrochemical Universities
基金
大庆油田有限责任公司"大庆油田气井稳产阶段排水采气技术研究"资助项目(2014C-0401)
关键词
储气库
水合物
压力损失
冲蚀
携液
Gas storage
Gas hydrate
Pressure loss
Erosion
Carrying liquid
