摘要
在油气开发过程中,油气的不断采出会造成地层压力的降低,由此导致油藏的渗透率逐渐降低,从而使油井的产能降低。以多孔介质流-固耦合理论为基础,建立渗透系数、孔隙度等参数的动态演化方程,由此导出油气储层渗流-应力动态全耦合模型。对包含一个生产井和一个注入井的封闭区域进行耦合分析,在计算过程中对岩石孔隙度和渗透系数等参数进行更新,所获得的结论可为优化开采、后期开发调整、重复压裂、套管损坏预测等提供理论依据。
During the production of oil and gas,the pore pressure of reservoir declined gradually with the withdrawal of oil and gas,which certainly caused the decrease of permeability with compaction deformation of the reservoir.Based on the theory of fluid-solid coupling of porous media,a fully seepage and stress coupling model was established,which could describe the evolution of porosity and permeability with stress and strain.A numerical model including a production well and a injection well in the closed region was set up,and the finite element method was applied for the evolutions of porosity and permeability.The study can provide credible foundation for adopting proper measurement to optimal development,repeated fracturing and prediction of casing failure.
出处
《长江大学学报（自科版）（上旬）》
CAS
2010年第1期104-107,共4页
JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG
基金
国家科技重大专项课题(2008ZX05005-006)
长江大学科研发展基金项目
关键词
油气开采
渗流-应力耦合
孔隙压力
渗透性演化
有限元
production of oil and gas
seepage-stress coupling
pore pressure
permeability evolution
finite element method
