主成分分析技术在储层预测中的应用——以饶阳凹陷留北地区上第三系为例

APPLICATION OF PCA TECHNOLOGY TO RESERVOIR PREDICTION ——TAKING UPPER TERTIARY IN LIUBEI AREA OF RAOYANG SAG AS AN EXAMPLE

饶阳凹陷留北地区上第三系主要为河流相沉积，在整个渤海湾盆地，河流相的储层预测是十分困难的。对于此类油藏的研究，除进行精细的地层划分和对比、沉积、储集层研究等地质工作外，还要充分利用当前先进的地球物理技术，对该类油藏进行预测。目前针对性的识别技术很多，主成分分析技术就是其中之一。研究表明，主成分分析方法是隐蔽性油气藏勘探的有利工具，可以获取更多、更可靠的储层信息，更精确地预测储层砂体空间分布，从新的角度去进行储层预测、油藏描述和地质资源风险评价，在饶阳凹陷应用，展示了河道砂体的非均质空间展布特征，与实钻情况吻合，证实了主成分分析技术的有效性。

The Upper Tertiary in Liubei area of Raoyang Sag is mainly fluvial deposit. It.＇ s well known that the forecast of fluvial reservoir is very difficult in Bohai Bay basin. For the research on this kind of reservoir, besides of the geologic studies, such as fine stratigraphy classification and correlation, research on deposition and reservoirs, etc. , the advanced geophysical technology needs to be used to the prediction of this kind of oil reservoir. At present, there are many identification techniques, and PCA is one among this techniques. According to the research, PCA is useful to the exploration of subtle reservoirs. With the application of this technique, more and more reliable data about the reservoir can be acquired, the special distribution of the sandbody in the reservoir can be predicted more accurately, and it is one new application to reservoir prediction, reservoir description and risk evaluation of geologic resources. This technique has been applied to Raoyang Sag, the heterogeneous special distribution characteristics of the channel sandbody are exhibited, which is coincident with the practical drilling, and this verifies the effectiveness of this method.