储集层参数动态地质模型的建立——以胜坨油田二区沙二段1~2层为例

胜坨油田二区沙二段12层注水开发38年,含水已高达96%以上,处于特高含水阶段.通过检查井岩心资料分析了不同含水阶段储集层参数的变化,认为渗透率是变化最明显的参数,且有随着含水的上升渗透率升高的规律.通过室内渗流物理模拟实验建立了该层渗透率随含水率变化的定量表达式,并对储集层参数的变化机理进行了研究,最终利用神经网络储集层定量建模技术,建立了渗透率随含水率变化的动态地质模型.图3表2参4

Dynamic geology model establishment of reservoir parameters- taking 12 layer,segment 2 of Shahejie Formation,Shengtuo Oilfield,as an example

The 12 layer, segment 2 of Shahejie Formation, Shengtuo Oilfield, has been developed by waterflooding for 38 years and the water cut is over 96%, now that the layer is in a super high water cut stage. The changes of the reservoir parameters in different stage of water cut are analyzed based on core information of the inspection wells. The analysis shows that the permeability changes most obviously and the permeability increases with the increase of water cut. The quantitive expression describing the permeability change with water cut is set up through percolation experiments and the variation rules of the reservoir parameters are studied.The dynamic geology model with permeability changing with water cut is established by way of net work quantitive reservoir modelling technique.