探矿工程-岩土钻掘工程Issue(5)：1-5,5.
有限元法确定煤层气井钻井液密度窗口模型应用
Determination of Drilling Fluid Density Window Model for CBM Well by FEM
摘要
Abstract
With the rapid growth of market demand for natural gas, how to successfully develop the rich CBM reservoir in Ningwu basin becomes an important subject in unconventional gas reservoir development.It is one of the key factors to sci-entifically determine a suitable drilling fluid density window by combining with the crustal stress state, the parameters of formation pore pressure and formation strength, as well as angle of deviation and azimuth angle in order to realize effective and safe coal-bed methane industrialization development in Ningwu basin.The finite element model of No.9 coal seam in Ningwu basin is established by ANSYS software, the influence rule of hole enlargement ratio is analyzed in the conditions of different crustal stress directions and different well inclination, by which the optimized range of mud density is obtained to control coal seam collapse and reduce complex prescription, and the support for research on improvement of drilling effi-ciency and comprehensive benefit of CBM in NingWu basin is found.关键词
煤层气/地应力/有限元法/井壁稳定/钻井液密度窗口/宁武盆地Key words
CBM/crustal stress/FEM/borehole stability/drilling fluid density window/Ningwu basin分类
能源科技引用本文复制引用
林海,陈磊,程远方,蒋振伟,张振活,凡帆,董海东,郝超,刘婷婷..有限元法确定煤层气井钻井液密度窗口模型应用[J].探矿工程-岩土钻掘工程,2014,(5):1-5,5.基金项目
国家科技重大专项“大型油气田及煤层气开发” （）
