非均质砂岩油藏长期开采后的窜流规律  

The Channeling Law of Heterogeneous Sandstone Reservoirs after Long-term Production

作　　者：华朝 林梅钦[1] 李明远 杨柳 胡婷 

机构地区：[1]中国石油大学(北京)提高采收率研究院,北京102249

出　　处：《石油天然气学报》2013年第10期121-124,8-9,共4页Journal of Oil and Gas Technology

基　　金：国家油气重大专项(2011ZX05009)

摘　　要：通过并联填充砂管水驱试验来研究砂岩油藏长期开采后的窜流规律。结果表明,储层非均质性程度越高,窜流形成时机越早,并且窜流程度越严重,即造成的注入流体低效循环现象越严重;非均质油藏中,高渗透层中流体流动符合高速非达西流模式,常用Forchhimer公式和指数型公式来描述;高渗透层中流体流动的非线性渗流指数较小时,注入水沿高渗透层突进,油藏注采窜流程度加剧,表现为高、低渗透层产液比远远大于它们的渗透率级差。The water flooding experiment of parallel sand filling tubes was adopted to investigate the channeling law of sandstone reservoirs after long-term water flooding.The results showed that the higher the heterogeneous degree was, the earlier the formation of channeling was and the higher the channeling degree was,thereby the low-efficiency circulation of injected fluid was more serious.The fluid flow in the high-permeability layer obeyed the high-speed non-Darcy seepage rule,which could be described with Forchheimer formula and exponential formula.When the index of non-linear flow in the high-permeability layer is smaller,the injected water preferably flows along high-permeability layer and the channeling degree of reservoir is aggravated,it is presented that the produced fluid ratio of high-permeability layer to low-permeability layer is much larger than the permeability contrast.

关 键 词：非均质性 砂岩油藏 窜流程度 形成时机 产液比 渗透率级差 

分 类 号：TE31[石油与天然气工程—油气田开发工程]