石油钻采工艺Issue(5)：53-57,5.DOI:10.13639/j.odpt.2014.05.013
有机酸盐环空保护液在元坝海相气藏的应用
Application of organic acid salt annular protective lfuid in Yuanba marine gas pool
摘要
Abstract
The marine gas pool in Yuanba is featured by great burial depth, high temperature, high pressure, high content of H2S and medium content of CO2, etc. The presence of H2S and CO2 in gas wells deteriorates the annular corrosion environment. In view of the special annular corrosion environment in high sulfur content gas wells, an organic acid salt protective lfuid with controllable density of 1.59 g/cm3 and temperature resistance of 160℃was generated by adding imidazoline H2S and CO2 inhibitors, ferrous stability, deoxidiz-ing bactericide, cleanup additive and pH modiifer. The indoor experiment shows that organic acid salt annulus protection lfuid is very stable in resisting high temperature and corrosion rate is far below the designed value of 0.076 mm/a and bactericidal ability is up to 99%. The protective lfuid was applied to three ultra-deep wells of marine gas pool in Yuanba, and the effectiveness was favorable. Among the wells, the Well Yuanba 204-1H had a cumulative gas production of 133.92×104 m/d by acid fracturing test;during gas testing, the tubing and casing in the annulus had no leaks, so the annulus protection lfuid functions very well to prevent corrosion of tubing external wall and casing internal wall and hence ensures safe and long-term service of tubing and casing.关键词
元坝海相气藏/环空保护液/高含硫/腐蚀速率Key words
Yuanba marine gas pool/annulus protection lfuid/high content of sulfur/corrosion rate分类
能源科技引用本文复制引用
段春兰,梁大川,王光平,温银武,霍宝玉,曹志波..有机酸盐环空保护液在元坝海相气藏的应用[J].石油钻采工艺,2014,(5):53-57,5.基金项目
国家科技重大专项“大型油气田及煤层气开发”（编号2011ZX05022）。 （）
