摘要
轮古油田缝洞型碳酸盐岩油藏微裂缝发育的基岩块可以视为等效连续介质,可与裂缝系统、溶洞系统一起构成等效三重连续介质。针对等效三重介质油藏提出裂缝与井筒连通的试井解释模型,采用Laplace变换求出解析解。该解析解考虑了井筒储集效应和表皮效应的影响。双对数导数曲线表现为两个下凹部分,分别表征溶洞系统向裂缝系统的窜流,以及等效连续介质向裂缝系统、溶洞系统的窜流。通过实例分析,验证了模型的有效性和合理性。
The fissure-developed base rock in Lungu carbonate oilfield can be regarded as an equivalent continuous medium,and together with the fissure system and cave system it can compose an equivalent triple continuous medium.To the equivalent triple continuous oil field,a well test interpretation model,in which fissure and borehole are connected,has been put forward.Adopting Laplace Transform we get analytical solution,this analytical solution has taken the wellbore storage effect and the skin effect into account.Two down concaves appear on log-log curves which represent two cross flows,i.e.1st,the cross flow from cave system to fissure system,and 2nd,the cross flow from the equivalent continuous medium to fissure and cave systems.The validity and rationality have been validated by the analysis of an instance.
出处
《油气井测试》
2009年第4期14-16,共3页
Well Testing
基金
中国石油天然气股份公司重点科技攻关项目"碳酸盐岩油藏评价与高效开发技术研究"(06-02A-07-01)
关键词
等效三重介质
概念模型
试井分析
缝洞型油藏
碳酸盐岩
轮古油田
equivalent triple continuous medium,concept model,well test analysis,cavity-fissured reservoir,carbonate rock,Lungu oilfield
