探矿工程-岩土钻掘工程Issue(6)：8-13,6.
羌塘盆地天然气水合物钻探试验井工程井壁稳定性分析
Analysis on Wall Stability of Gas Hydrate Drilling Test Well in Qiangtang Basin of Tibet
摘要
Abstract
Based on three-dimensional fast Lagrangian finite difference method of fluid-solid coupling theory of porous medi-um and elasto-plastic limit equilibrium theory, according to the QK-2 well drilling data of gas hydrate drilling test well in Qiangtang basin, the analysis is made on the mechanism of borehole instability under the condition of seepage and the nu-merical simulation analysis is also made on the wall stability of instable section to learn stress distribution of surrounding rock around the well and deformation laws of borehole collapse or crack in different drilling fluid density.The safe density window of drilling fluid is determined for no formation collapse ( diameter reducing) and no leakage for the gas hydrates drilling test well in Qiangtang basin, so as to provide the evidences for the determination of casing program design and rea-sonable drilling fluid density.关键词
天然气水合物/钻探/井壁稳定性/钻井液安全密度窗口/羌塘盆地Key words
gas hydrate/drilling/well wall stability/drilling fluid density window/Qiangtang basin分类
天文与地球科学引用本文复制引用
吴纪修,张永勤,梁健,李宽,李鑫淼,王汉宝..羌塘盆地天然气水合物钻探试验井工程井壁稳定性分析[J].探矿工程-岩土钻掘工程,2014,(6):8-13,6.基金项目
中国地质调查局天然气水合物勘查与试采专项之“羌塘盆地天然气水合物资源勘查（钻探试验井工程）” （）
