基于地质参数的陆相泥页岩岩相预测
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摘要
基于渤南洼陷沙三下泥页岩油气勘探实践,认为有利岩相发育是油气富集高产的基础。渤南洼陷储层岩石结构细,岩石类型复杂,有利岩相预测难度大。为明确有利岩相发育区,在对岩相储集特征及地震响应特征分析的基础上,运用基于地质参数的岩相预测技术,选取反映岩相差异的地质参数,通过建立地质参数与敏感地震属性的拟合关系表征地质参数的平面分布,再以地质参数为变量进行聚类分析,实现岩相的平面预测。有利岩相主要分布在北部洼陷带,预测结果对泥页岩油气勘探具有一定的指导意义。
Based on the petroleum exploration practices of lower Es3 mud shale in the Bonan Subsag,it is believed that favorable lithofacies development is the basis for the enrichment and high production of oil and gas. The rock texture is fine and the rock type is complicated in the reservoirs of the Bonan Subsag,resulting in large difficulty in predicting the favorable lithofacies. In order to define the favorable lithofacies development area,through analyzing the lithofacies reservoir and seismic response characteristics,this paper uses the lithofacies prediction technique based on geologic parameters to select the geologic parameters reflecting the lithofacies differences,establishes the matching relation of geologic parameters and sensitive seismic attributes to characterize the horizontal distribution of geologic parameters,takes the geologic parameters as variables to conduct cluster analysis,and finally realizes the planar prediction of lithofacies. The favorable lithofacies are mainly distributed in the northern subsag zone. The predicted results are very instructive for the petroleum exploration of mud shale.
引文
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