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在滩坝砂体薄储层预测方面,单纯的应用地质分析方法和地震预测方法存在明显的局限性。建立一套适用于现有资料和技术条件下的薄互层储层预测方法,具有重要意义。文章以东营凹陷沙四段为例,提出了基于滩坝砂体成因层序特点的地质-地球物理综合预测方法。首先,通过层序地层研究,明确滩坝砂体发育区;其次,分析滩坝砂体的地质-地震响应特征,选择针对性的储层预测方法和地震属性参数组合;最后,对目标层段进行多属性分析确定有利相带,井震结合精细描述滩坝砂体。应用该方法,对东营凹陷沙四段滩坝砂体的预测取得了良好效果。实践证明,地质分析与地球物理技术的综合应用是预测描述薄互层储层的有效途径。
In the prediction of thin reservoir of beach bar and sand body, there are some obvious limitations in applying purely geological analysis method and earthquake prediction method. It is of great significance to establish a set of thin interbedded reservoir prediction methods that are suitable for existing data and technology. Taking the fourth member of Shahejie Formation in Dongying Sag as an example, this paper presents a geophysical-geophysical integrated prediction method based on the genetic sequence of the beach-bar sand body. First of all, through the study of sequence stratigraphy, the development area of beach-bar sand body is clarified. Secondly, the geologic-seismic response characteristics of beach bar-sand body are analyzed, and the targeted reservoir prediction method and seismic attribute parameter combination are selected. Finally, Multi-attribute analysis to determine the favorable facies belt, well seismic combined with a detailed description of beach bar sand body. Applying this method, good results have been obtained in the prediction of beach sand bodies of Shahejie formation in Dongying depression. Practice has proved that the comprehensive application of geological analysis and geophysical technology is an effective way to predict the description of thin interbed reservoirs.