应力敏感效应的气井流量动态特征研究  

Study on stress sensitivity effect on flow dynamic features of gas wells

作　　者：樊怀才[1] 李晓平[1] 窦天财[2] 吴欣袁[1] 

机构地区：[1]西南石油大学"油气藏地质及开发工程"国家重点实验室 [2]延长油田股份有限公司开发事业部

出　　处：《岩性油气藏》2010年第4期130-134,共5页Lithologic Reservoirs

摘　　要：在油气藏的开发过程中,特别是对于低渗透油气藏及火山岩油气藏的开发,储层岩石应力敏感性会明显影响油气藏的开发效果。文中考虑了表皮系数及孔隙受应力敏感效应影响而发生变形的问题,利用不稳定渗流理论建立了数学模型,并利用Stehfest数值反演法得到了模型实空间的解。根据实空间中无因次产量与无因次时间的变化关系,分析了表皮系数、无因次应力敏感系数、封闭边界以及定压边界对气井流量动态特征的影响。研究结果表明,科学合理地开发具有应力敏感效应的气藏,可保证气井和气藏的正常生产。The rock stress sensitivity will apparently affect the development performance in the process of reservoirs developing, especially in the development of low permeability reservoirs and volcanic reservoirs. The mathematical model is established by using the transient flow theory under the consideration of stress sensitivity and the skin coefficient, and the solution of the real space is obtained by means of the Stehfest numerical inversion. On the basis of the varying relation between the dimensionless rate and dimensionless time, the influences of skin coefficient, dimen-sionless stress sensitivity, closed boundary and constant pressure boundary on the dynamic features of gas wells are analyzed. The research result shows that to reasonably develop gas reservoirs with stress sensitivity can make sure of the gas wells and reservoirs producing normally.

关 键 词：应力敏感 流量动态特征 表皮系数 数学模型 产量 

分 类 号：TE319[石油与天然气工程—油气田开发工程]