垦西斜坡带沙三段扇三角洲水下分流河道砂体的识别与预测
Abstract: The sub-channel branch sandbodies of fan delta front in the third member of the Shahejie Formation in Kenxi slope is favorable to form lithologic trap. However, the geologic research in this area is low, and the distribution of the sandbodies is not clear. This article aims to solve the problems of recognizing the sub-channel branch sandbodies and predicting their distribution.Using the method of sequence stratigraphic correlation and analysis of the origin of sandbodies, this article finds out that in the paleo-geomorgraphicbackground of alternation of slopes and valleys, the ancient grooves formed by Guxi Fault controlled the distribution of sub-channel branch sandbodies of fan delta front, which is consistent with “compound control of sandbodies by ancient grooves-slope break belt” model. Guided by sedimentary models of fan delta, after tracing seismic attributes laterallyand extractingattribute layer by layer, this article predicates the distributionof thesub-channel branch sandbodies and points out that updip pinch out parts of the sub-channel branch sandbodies are the advantageous objects of lithologic hydrocarbon reservoirexploration.
Key words: Kenxi slope; Fan delta; Sub-channel branch; Seismic facies; Paleo-geomorgraphy1 研究概况
2 古地貌特征分析
3 水下分流河道砂体的识别特征
3.1 砂体的岩性特征
3.2砂体的电性特征
3.3 地震响应特征
4 水下分流河道砂体的分布预测
5 结论
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本文编号：240951
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