模糊数学方法在非背斜油气藏地震勘探中的应用  

Application of fuzzy mathematical method to seismic exploration for non-anticlinal hydrocarbon reservoir,

作　　者：张小平[1] 向鼎璞 吴大奎[1] 

机构地区：[1]四川石油管理局地调处地震资料处理解释中心

出　　处：《石油地球物理勘探》1990年第6期726-733,761,共9页Oil Geophysical Prospecting

摘　　要：在川中—川南过渡带非背斜油气藏地震勘探中,用模糊数学方法识别含油气地震反射异常见到了良好的效果。本文系统地叙述了该方法的原理和利用地震特殊处理资料(拟测井层速度(PIVT)和瞬时振幅包络及瞬时相位剖面)及地震反射时间剖面(经过相对振幅保持和高分辨率处理)选取指标参数的方法。文中提供的应用实例表明,在二叠系阳新统茅口组(裂缝型油气储集层)的14口探井中,用模糊聚类分析预报的产气量与探井产气情况完全吻合的有10口井,占71.4×10^(-2),基本吻合的有4口井,占28.6×10.(-2)。另外,对三叠系中统雷口坡组雷一(孔隙型油气储层)油气藏的油气预测也获得了满意的结果。Excellent result in identifying hydrocarbon seismic reflection anomaly with the use of fuzzy mathematical method has been received in seismic exploration for non-anticlinal hydrocarbon reservoir in transitional zone between mid Sichuan and south Sichuan.The prin- ciple of the method is described systematically.It is also stated how we choose index parameters by using specifically processed seis- mic data (pseudolog interval velocity,instantaneous amplitude en- velope section and instantaneous phase section)as well as seismic re- flection time sections which underwent relative amplitude preserva- tion and high-resolution processings. The article presents some examples to show this method feasible, Of 14 wells which penetrate the Maokou formation (fractured reser- voir) in the Yangxin series of Permian system,10 wells,accounting for 71.4×10^(-2)of the total wells,show excellent coincidence of fuzzy cluster analysed gas production with real gas production;and 4 wells,accounting for 28.6×10^(-2),manifest fairly good coincidence of the predicted production with real production.In addition,prediction on the Leill reservoir (porous reservoir) of the Leikoupo formation of mid Triassic system also brought satisfactory result.

关 键 词：非背斜油气藏 模糊数学 指标参数 模糊聚类分析 

分 类 号：TE13[石油与天然气工程—油气勘探] P618.13[天文地球—矿床学]