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随着技术水平的不断发展与完善,现代水平井钻井技术在煤层气开采中得到了广泛的应用,其中射孔套管在不同的生产时期、生产条件和不同的煤层地质环境下,受力情况是不同的。在常规的条件下研究水平井段射孔套管的受力情况,即在确定套管的有效外挤压力的情况下,利用有限元分析软件ANSYS对射孔套管进行了实体建模、网格划分及有限元计算。最终通过数据处理及对比分析,得出射孔套管受力情况随着有效外挤压力增加的变化规律,从而确定了射孔套管达到抗外挤强度最小值时的最大有效外挤力,为套管强度设计奠定基础。
With the continuous development and improvement of the technology, the modern horizontal well drilling technology has been widely used in the coalbed methane exploration. The perforation casing in different production periods, production conditions and different coal seam geological conditions, the force situation Is different. Under normal conditions, the horizontal well section perforation casing of the force situation, that is to determine the casing outside the effective extrusion pressure circumstances, the use of finite element analysis software ANSYS perforation casing solid modeling, Mesh Division and Finite Element Calculation. Finally, through the data processing and comparative analysis, the variation law of perforation casing stress with the increase of effective external extrusion pressure is obtained, so as to determine the maximum effective external extrusion force when the perforated casing reaches the minimum anti-extrusion strength, Lay the foundation for the design of casing strength.