【摘要】 四川盆地自普光和龙岗礁滩气藏发现以来,碳酸盐岩礁滩气藏成为天然气勘探的重要领域。在对碳酸盐岩生物礁储层的研究中,如何识别、刻画生物礁是地质工作者面临的一大问题。生物礁等地质异常体的存在会使地层的岩性产生横向不均匀性进而导致地震反射信号的变化。在对四川盆地J地区二叠系长兴组生物礁储层研究的实践中,应用曲率体属性分析地震道之间反射振幅的细微变化,能够很好地体现反射界面的弯曲程度,精细地反映生物礁的展布及刻画其内部结构,为进一步研究生物礁有利储层提供了帮助,同时可以为类似地区的研究工作提供重要的参考和借鉴。更多还原

【Abstract】 Carbonate reef-shoal gas reservoirs were an important domain for gas exploration since Puguang and Longgang reef-shoal gas reservoirs were found in Sichuan Basin. In the research of the carbonate reservoirs,how to distinguish and depict carbonate bioherm was a big problem to the geologists. The existence of geological anomalous bodies would induce lateral heterogeneity to the lithology in the strata and cause the variance of seismic reflecting signals. Through the practice in the research of bioherm reservoir in the Permian Changxing Formation of Area J in Sichuan Basin,the curvature volume-attribute is used to analyze the slight change of reflecting amplitude among the seismic traces to present the degree of crook of reflecting interfaces and accurately reflect the distribution of bioherm and internal structure,and it provides help for the further research of beneficial bioherm reservoirs,also provides an important reference for similar study.更多还原