弹性阻抗及其含气性的指示意义  

The Expression of Flexibility And It's Commercial Value

作　　者：赵明清[1] 潘仁芳[2] 

机构地区：[1]中国石油化工股份有限公司东北石油局,吉林长春130000 [2]长江大学地球科学学院,湖北荆州434023

出　　处：《中国科技信息》2012年第14期48-49,共2页China Science and Technology Information

摘　　要：根据Demenico理论进行正演模拟能够敏感的检测到气层的AVO响应,因此AVO技术在气层检测方面占有比较大的优势,在AVO正演基础上,利用弹性参数的差异,通过选择适当的弹性参数表达式,对吴起地区30口井进行拉梅常数(λρ/μρ)交会分析,用λρ和μρ来区分含油气性,效果比较好,λρ和μρ剖面可以比较直观地解释含油气储层。研究发现在(λρ/μρ)交会图中好的含气性砂岩样点与其它样点(一般含气或者差气层)分布区域不同,含气性较差砂岩样点与其它样点基本处于同一区域中。研究结果不但对AVO正演结果进行了检验,还将含气性好与含气性差点砂岩区分开,对气藏商业价值研究具有很好的指示意义。we can detect the gas＇ s AVO response sensitively through doing forward modeling which base on Demenico theory, so AVO has a big advantage in detecting gas--reservoir. By choosing the appropriate expression of flexibility and in the use of different parameters We can do some analysis of lame constant（λρ/μρ ） closspiot. Using λρand μρ profile can explain gas and oil reservoir directly. And we can get a good result in distinguish the ）ithology and the hydrocarbon saturation by usingλρ, μρ. Good gas- bearing sandstone samples and other samples （generally poor gas--bearing sandstone or bad gas-- bearing sandstone） distribution in different regions in λρ- μρossplot. Bad gas--bearing sandstone samples and other samples are general in the same area. The research result not only test the AVO forward modeling but also distinguish the good gas-bearing sandstone with bad gas-bearing sandstone and have very good meaning in research of gas reservoir＇ s commercial value.

关 键 词：Demenico理论 弹性参数 拉梅常数 含油气储层 

分 类 号：P618.13[天文地球—矿床学]