New Gas Drive Analysis Method
首发时间:2011-03-02
Abstract:For gas reservoir driving, the main gas driving force , the dynamic changes of gas reservoir and the interreaction between gas reservoir and its surrounding water area in each development phase should be considered. The dynamic change of gas reservoir means the changes of gas reservoir pressure and PORV of gas storage; By introducing the least-square method to the material balance equation of gas reservoir and considering the liquid expansion and decreased pore volume caused by the decreased pressure and combining the liquid state equation and the elastic medium state equation , a new method to analyze the gas reservoir driving has been established, and relative new calculating formula of degree of reserve recovery, effective compressibility, relative pressure coefficient, cumulative gas production and geologic reserve of gas reservoir have been produced; This new method lays a theoretical foundation for the traditional formation pressure method, the law of water cutting volume factor and the Havlena-Odeh method, and it can be applied to the driving analysis of normal gas reservoir, abnormally pressured gas reservoir and condensate gas reservoir; By putting this new method into the Anderson 'L' gas reservoir: An abnormally pressured gas reservoir in south Texas of America, we get good analyzing results.
keywords: Gas drive material balance traditional formation pressure method law of water cutting volume factor Havlena-Odeh method
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气藏驱动分析新方法
摘要:气藏的驱动方式影响着气田开发以至于整个供气系统的技术经济指标,它影响着井位分布、井底结构、气井产量、最终天然气采收率、地面天然气和凝析油的集输系统和处理系统,以至于长输管线的管径、壁厚和生产工艺制度等;气藏的驱动方式,不仅要考虑主要的驱气动力,而且相当重要的要考虑在开发各阶段的气藏动态变化和气藏与周围供水区的相互作用,气藏的动态变化又主要指气藏压力和储气孔隙体积的变化;利用气藏的物质平衡通式,综合考虑压力变小引起液体的膨胀及孔隙体积减小,结合液体介质状态方程和弹性介质状态方程,得到气藏驱动类型判别新方法;该新方法克服传统地层压力系数法及水浸体积系数法理论上的不足,同时也适用于判断异常高压气藏驱动的情形。
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No.4411942570967129****
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