求取有效渗透率的一种简便方法  

A simple method of computing effective permeability

作　　者：贾红兵[1] 毛伟[1] 包志晶[1] 杜朋举[1] 杨丽君[2] 

机构地区：[1]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [2]中国石油大庆油田有限责任公司天然气分公司

出　　处：《石油地质与工程》2011年第6期92-95,9,共4页Petroleum Geology and Engineering

基　　金：中国石油天然气股份有限公司项目"大庆低渗透油藏有效开发技术应用基础研究"(2008B-0903)部分成果

摘　　要：渗透率尤其是有效渗透率是油田开发中的重要参数之一,传统获取方法通常受到成本或精度等因素的制约。利用生产过程中测得的产量、井底流压等数据,根据物质平衡原理和达西定律,提出首先计算目前地层压力和供油半径,进而应用平面径向流公式计算有效渗透率的一种简便方法。参数自身误差和敏感性分析表明,地层原油黏度对计算精度有较大影响,其它参数影响较小。以海拉尔盆地N3区块7口典型井为例,计算了射开井段的有效渗透率,与试井解释结果基本一致,说明新方法是可靠的,能够为新区井距确定、产能论证及动态分析提供可靠的有效渗透率值,具有良好的应用前景。Permeability especially effective permeability is one of the most important parameters in the development of oil field. Traditional methods are usually constrained by cost or precision, and generally require a specific set of processes. It would have great value if permeability can be computed in normal production process. A research is made on how to calculate permeability using the data of production and producing fluid level. For the elastic-driven non-saturated reservoir that has no edge and bottom water, or the energy of water is weak, a new method to calculate the current formation pressure and drainage radius first, then to calculate the effective permeability using plane radial flowing equation is provided, it is based on material balance rule and Darcy equation. An example is made on calculating the permeability of seven wells of Block N3 in Hailar basin using the new method. The permeability calculated by the new method is similar to the result of well test analysis,it shows the new method is reliable. A reliable value of permeability can be provided for designing development plan of new blocks, such as determining well pattern, well spacing, and production capacity, offering values of permeability in numerical reservoir simulation, it has a favorable application prospect.

关 键 词：有效渗透率 物质平衡原理 达西定律 地层压力 供油半径 

分 类 号：TE312[石油与天然气工程—油气田开发工程]