川中须家河组气藏为典型的大面积、低丰度、致密岩性气藏类型,资源潜力巨大,是四川盆地增产上储重要层系;但该类气藏储层薄、非均质性强、气水关系非常复杂,如何提高含气富集区(甜点)预测精度和建立气水识别方法是须家河组气藏勘探开发...川中须家河组气藏为典型的大面积、低丰度、致密岩性气藏类型,资源潜力巨大,是四川盆地增产上储重要层系;但该类气藏储层薄、非均质性强、气水关系非常复杂,如何提高含气富集区(甜点)预测精度和建立气水识别方法是须家河组气藏勘探开发最关键的问题。从储层岩石物理分析和模型正演等基础研究入手,深入分析不同岩性组合下气层和水层的振幅随偏移距变化(amplitade variation with offset,AVO)响应特征,建立了一套以AVO叠前道集、近远道叠加剖面对比分析为基础,AVO主振幅主频率技术为核心的须家河组致密气藏检测及气水层识别新思路和新方法,生产应用效果显著。展开更多
Considering magneto-electro-elastic thin plate, the von Karman plate theory of large deflection and the geometric nonlinearity, the mathematical model of nonlinear undamped forced vibration is established. Making use ...Considering magneto-electro-elastic thin plate, the von Karman plate theory of large deflection and the geometric nonlinearity, the mathematical model of nonlinear undamped forced vibration is established. Making use of the improved Lindstedt-Poincare （L-P） method, the undamped forced vibration problem is solved, and the amplitude-frequency response equation of thin plate is obtained. Furthermore, the amplitude frequency response curves of system under different condi- tions are obtained by numerical simulation. The results show that the thickness of the plate, mechanical excitation, parame- ter e, pure piezoelectric material of BaTiO3, pure piezomagnetic material of CoFe2 04, different magneto-electro-elastic ma- terials of BaTiO3/CoFe2 04 and Terfenol-D/PZT will have an impact on the system frequency response. The main effects in- volve principal resonance interval, spring stiffness characteristic and amplitude jumping phenomena.展开更多
文摘川中须家河组气藏为典型的大面积、低丰度、致密岩性气藏类型,资源潜力巨大,是四川盆地增产上储重要层系;但该类气藏储层薄、非均质性强、气水关系非常复杂,如何提高含气富集区(甜点)预测精度和建立气水识别方法是须家河组气藏勘探开发最关键的问题。从储层岩石物理分析和模型正演等基础研究入手,深入分析不同岩性组合下气层和水层的振幅随偏移距变化(amplitade variation with offset,AVO)响应特征,建立了一套以AVO叠前道集、近远道叠加剖面对比分析为基础,AVO主振幅主频率技术为核心的须家河组致密气藏检测及气水层识别新思路和新方法,生产应用效果显著。
基金National Natural Science Foundation of China(No.11202190)Scientific Research Staring Foundation for the Returned Overseas Chinese Scholars,Ministry of Education,ChinaResearch Project Supported by Shanxi Scholarship Council of China(No.2013-085)
文摘Considering magneto-electro-elastic thin plate, the von Karman plate theory of large deflection and the geometric nonlinearity, the mathematical model of nonlinear undamped forced vibration is established. Making use of the improved Lindstedt-Poincare （L-P） method, the undamped forced vibration problem is solved, and the amplitude-frequency response equation of thin plate is obtained. Furthermore, the amplitude frequency response curves of system under different condi- tions are obtained by numerical simulation. The results show that the thickness of the plate, mechanical excitation, parame- ter e, pure piezoelectric material of BaTiO3, pure piezomagnetic material of CoFe2 04, different magneto-electro-elastic ma- terials of BaTiO3/CoFe2 04 and Terfenol-D/PZT will have an impact on the system frequency response. The main effects in- volve principal resonance interval, spring stiffness characteristic and amplitude jumping phenomena.
