石油钻采工艺Issue(1)：64-67,4.DOI:10.13639/j.odpt.2015.01.016
深水钻井溢流井控期间水合物生成主控因素
Main control factor of hydrate generation during overlfow well control period of deepwater drilling
摘要
Abstract
At present, most scholars judge the hydrate generation based on the thermodynamic characteristics. However, in order to make a more accurate judgment, the characteristics of molecular dynamics should be considered. The hydrate formation in the wellhole is relatively slow. Even if the thermodynamic conditions for hydrate formation are met, it is inevitable to go through the hydrate nucle-ation and growth processes. Based on the wellhole multi-phase lfow law during the overlfow well control period of deepwater drilling, characteristics of thermodynamics and dynamics of hydrate, as well as micro-pore plate theory of hydrate membrane, this paper has researched the hydrate generation mechanism in the circulation, well shut-in and well killing during the overlfow well control period, and analyzed the effects of different lfow patterns on the hydrate generation. According to the research results, when the deepwater drilling overlfow occurs, no hydrate will be generated if the throttle device is installed at the wellhead during the circulation period; during the well shut-in period, no hydrate blocking will be formed under bubble lfow conditions, but formed at the wellhead under the slug lfow conditions; during the well killing period, the hydrate generation will not pose great hazards to the wellhole.关键词
深水钻井/溢流/水合物/生成机理Key words
deepwater drilling/overlfow/hydrate/generation mechanism分类
能源科技引用本文复制引用
谢仁军,刘书杰,文敏,吴怡..深水钻井溢流井控期间水合物生成主控因素[J].石油钻采工艺,2015,(1):64-67,4.基金项目
“十二五”国家科技重大专项“西非、亚太及南美典型油气田开发关键技术研究”（编号2011ZX05030-005）；国家自然科学基金“海洋深水浅层钻井关键技术基础理论研究”（编号51434009）。 （）
