储层厚度定量解释方法研究

A research into quantitative interpretation of reservoir thickness

目前常用的储集薄层厚度的估算方法,假定了储集层及其围岩的声阻抗在横向上保持不变;并要求有一定数量的探井钻遇砂岩储集体。但是,对于陆相沉积、探井稀少甚至无井的新区,以上条件是十分苛刻的。本文提出一种新的薄层厚度定量解释方法——地震反射波特征点法。该方法不仅可以快速地估算薄层和薄互层的厚度,而且可以避免上述假设条件。将此法用于辽东湾的实际资料,表明该方法具有较高的精度和稳定性。

Present ordinary methods for estimating thin-reservoir thickness assume that the acoustic impedances of the reservoir and its country rock are laterally constant; besides, they need sandstone reservoir penetrated in some drillings. However, the above requirements can hardly be met in a continental sedimentary area and the area where few exploratory wells (or no well) have been drilled. The article recommends seismic reflection characteristic-point method, a new me- thod for quantitative thin reservoir thickness interpretation. This new method not only speeds up the calculation of the thickness of thin reservoir or thin interbedding layers but also avoids the above as- sumption. This method was used in real estimation about seismic data in Liaodong bay and has been proved accurate and stable.