摘要
深水气田完井测试过程中,井筒温度场的变化会使油气热量散失,导致生成天然气水合物、环空出现较大的带压值等严重后果,影响油气井的安全完井、测试及井筒的完整性。文中分析和对比研究了水合物热力学抑制剂注入、井下节流、保温油管和保温测试液等水合物抑制机理和调控方法,对研制成功的保温测试液进行了性能评价。用不同方法计算和模拟了深水测试过程中的井筒温度场,并对南海西部2口深水气井现场测试中水合物抑制剂注入和保温测试液进行了分析。现场应用表明,保温测试液能有效抑制水合物生成,且具有工艺简单、可控性好、危险程度低等优点,不仅填补了国内深水水基保温测试液技术的空白,还保障了深水测试作业安全顺利实施,有力地促进了深水测试关键技术的研发和应用。
Variation of wellbore temperature field during deep water gas field well testing causes oil and gas heat loss, which leads to the formation of natural gas hydrate, high pressure in the annulus and other serious consequences, affecting the safety of well completion, well testing and well integrity. In this article, the inhibition mechanism and regulation method of hydrate inhibition such as hydrate inhibitor injection, downhole throttling, insulated tubing and thermal insulation testing fluid are analyzed and contrasted,and the performance of thermal insulation testing fluid are evaluated. The wellbore temperature field during deep water gas well testing was calculated and simulated by using different methods, and the application of hydrate inhibitor injection and thermal insulation testing fluid, which were used in the two deep water gas well testing of South China sea, are analyzed. The field application shows that the thermal insulation testing fluid has the advantages of absolute hydrate inhibition, simple process, good controllability and low risk and so on, which not only fills the technology gaps in the domestic deep water water-based thermal insulation testing fluid, ensures the safe and smooth operation of deep water well testing, but also effectively promotes the development and application of deep water well testing key techniques.
出处
《断块油气田》
CAS
北大核心
2018年第1期107-110,共4页
Fault-Block Oil & Gas Field
基金
国家科技重大专项“琼东南盆地深水区大中型气田形成条件及勘探关键技术”(2016ZX05026)
关键词
深水
测试
水合物
抑制
保温隔热液
deep water
testing
hydrate
inhibition
thermal insulation fluid
