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目前,火山岩储层预测还处于火山岩体外观几何形态的定性描述阶段。针对准噶尔盆地乌夏地区夏72井钻遇的气孔未充填熔结角砾凝灰岩这套优质储层开展定量储层预测技术探讨,旨在推动火山岩储层预测技术向定量化方向发展。通过乌夏地区二叠系火山裂隙式喷发模式的建立,认为其分布受火山口、喷发断裂和古地貌的控制。首先,通过火山口识别、喷发断裂刻画和古地貌恢复以及多属性聚类分析,预测熔结角砾凝灰岩的分布;其次,建立气孔充填程度与速度和振幅之间的定量关系,通过正演模拟和反演加以相互验证;最后,在熔结角砾凝灰岩的分布范围内,预测均方根振幅和速度平面分布,根据上述的定量关系,得到气孔未被充填的熔结角砾凝灰岩这套优质储层的分布。预测结果得到钻探证实,证明这种定量预测技术是适用的,值得在类似地区推广应用。
At present, the predictions of volcanic reservoirs are still in the qualitative description phase of the volcanic rock appearance geometry. In order to promote quantitative prediction of volcanic reservoirs, aiming at the exploration of quantitative reservoirs by using the high-quality reservoirs unfilled in the Xia 72 well in Wuxia area, Junggar Basin, this reservoir is unfilled. Through the establishment of Permian volcanic fissure eruptions in Wuxia region, the distribution of volcanic fissure eruptions is thought to be controlled by crater, eruption and paleogeomorphology. Firstly, the distribution of the brecciated tuffs is predicted through the crater identification, eruption fault characterization, palaeogeomorphology restoration and multi-attribute cluster analysis. Secondly, the quantitative relationship between the filling degree of stomata and the velocity and amplitude is established. Through the forward modeling And the inversion to be verified by each other. Finally, the root mean square amplitude and velocity plane distribution are predicted within the range of the distribution of the sinter-brecciated tuff. Based on the above quantitative relationship, the set of high-quality Distribution of reservoirs. The prediction results have been confirmed by drilling, proving that this quantitative prediction technique is suitable and worth to be popularized in similar areas.