摘要
目前多层合采系统渗流理论研究多局限于模型的构建和求解,对多层试井模型的适用范围并未给出明确的说明。引入有效井径模型和无因次井储时间修正了多层合采系统的数学模型,通过解析求解获得了多层油藏典型井底压力曲线图版,与单层模型不同,除了早期续流段曲线出现"驼峰"特征外,处于中晚期流动阶段的曲线也具有"驼峰"和"凹子"的特征。结合渤海油田压力测试资料对该特征进行了论证分析,界定了多层油藏试井模型的适用范围,即储层边界类型不同或层间渗透率级差大(测井渗透率级差大于5)。渤海油田矿场实例分析表明,本文提出的多层试井模型的适用范围合理可靠,可为油气井生产方案实施提供技术支持。
Research on percolation theory of multi-layer commingled production is limited to model establishment and solution,and the applicable scope is not clear. Effective well radius model and dimensionless wellbore storage time are introduced to revise the model which is solved with analytical method to obtain a type curve chart of multilayer well test model. Results show that besides the curve has ＂hump＂characteristics in the early stage,it has＂hump＂or＂concave＂characteristics in the middle and later stages compared with single layer well test model.Based on well test data from Bohai oilfield,explanation of this characteristic is given,and the applicable scopes of multi-layer well test model are given as： different reservoir boundaries or high permeability ratio among layers（ logging permeability ratio is larger than 5）. Application on Bohai oilfield shows that the proposed applicable scope is reasonable and reliable,thus providing technical support for well production plan implementation.
出处
《中国海上油气》
CAS
CSCD
北大核心
2017年第2期78-86,共9页
China Offshore Oil and Gas
基金
中国海洋石油总公司"十二五"重大项目"陆相砂岩油田优化注水技术研究(编号:CNOOC-KJ125ZDXM06LTD-02)"部分研究成果
关键词
多层合采系统
有效井径模型
压力图版
试井解释
储层边界
渗透率级差
渤海油田
multi-layer commingled production system
effective well radius model
type curve chart
well test interpretation
reservoir boundary
permeability ratio
Bohai oilfield
