作　　者： ; (陈国民）;

机构地区： 广东石油化工学院

出　　处： 《物探化探计算技术》 2023年第2期202-209,共8页

摘　　要： 我国大多数盆地都发育古河道沉积,现有研究表明古河道沉积已成为我国油气聚集的重要场所,对其进行可靠地预测对寻找古河道类型油气藏具有重要意思。利用地震属性来进行古河道的预测是目前的主要方法,但通过正演模拟研究发现,不同单一地震属性对河道沉积的敏感性不同,有些属性对大多数河道沉积的沉积比较敏感(如均方根振幅、平均反射强度等),有些对部分较厚的河道沉积特别敏感,而对其他河道沉积反映一般。基于这一认识,提出了一种称之为一主双次三属性组合的新属性,该属性结合了均方根属性、振幅的立方差和平均频率的优点而建立,S油田的正演模拟和应用表明,该组合属性相对单一敏感属性在预测古河道沉积方面更有优势。 Most basins in China have developed paleo-channel deposits.Existing research has shown that paleo-channel deposits have become important for oil and gas accumulation in China.Therefore,reliable prediction of paleo-channel deposits is of great significance for finding paleo-channel reservoirs.Using seismic attributes to predict ancient rivers is the primary method.However,the forward simulation study found that different single seismic attributes have different sensitivity to river deposition.Some attributes are more sensitive to most river deposition,such as root mean square amplitude,average reflection intensity,etc.Some are particularly sensitive to some thicker river deposition,while others are generally sensitive to other river deposition.Based on this understanding,a new attribute is proposed,which combines the advantages of a single base-sensitive seismic attribute,a cubic difference of amplitude and average frequency.The application of Forward modeling and the application of S oilfield shows that the combined attribute has more advantages in predicting paleo-channel deposition than a single sensitive attribute.

关 键 词： 盆地 古河道 正演模拟 地震属性 组合属性

领　　域： [天文地球—地质矿产勘探] [天文地球—地质学]