多层合采凝析气藏小层产量分配规律  

Study on production distribution laws of single layers in commingling condensate pool

作　　者：郭平[1] 刘安琪[1] 朱国金 杨宝泉 王娟[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,四川成都610500 [2]中海油研究总院开发研究院,北京100027

出　　处：《石油钻采工艺》2011年第2期120-123,共4页Oil Drilling & Production Technology

基　　金：国家科技重大专项子课题"深水扇储层气田产能和开发指标预测技术研究"(编号:2008ZX05056-02-02-03)资助

摘　　要：由于凝析气井在生产过程中反凝析出的凝析油的影响,目前对气井多层合采提高多层气藏和气井开发效率的研究主要针对干气藏多层合采。建立了地层无水体条件下按层储量比例多层合采凝析气藏的室内物理模拟实验方法,研究了定产衰竭条件下的小层产量分配规律;采用数值模拟方法研究了多层合采时小层的产出分配规律。从试井、室内物理模拟实验以及数值模拟3个不同的角度出发研究了多层合采的产出分配规律。结果表明,封闭边界的常规气井或气藏在多层合采的生产初期,产量按各小层的地层系数进行分配;当压力波到达边界之后,经过一段生产过渡期,逐渐过渡为按地层储量比进行分配。研究结果对中高渗气藏中后期合层生产的产量劈分研究提供了新的理论依据。At present,because of the condensate oil effect on production of condensate gas well during the development,commin-gling production is used to improve the development efficiency of commingling reservoirs or wells with multilayer mainly,especially to the dry gas pool.The laboratory physical simulation method for condensate gas reservoir commingled production in proportion of layer reserves under formation without water condition is established,and production distribution law of layers under fixing output quotas depletion is analyzed.Then,the distribution law has also been studied by numerical simulation and theoretical well testing.The study results of 3 ways-theoretical well testing,indoor physical simulation and numerical simulation-show that the production of conventional gas wells or gas reservoirs with sealed boundaries should be distributed according to the formation coefficient at the first stage of com-mingling production;when pressure waves has reached the boundaries,after a period of production transition,it gradually changes to be distributed according to the formation reserve proportion.The study results provide a new theoretical basis for the production distribu-tion of gas reservoirs with medium-high permeability at the middle and later development period.

关 键 词：凝析气藏 多层合采 小层产量分配规律 物理模拟 数值模拟 

分 类 号：TE372[石油与天然气工程—油气田开发工程]