辫状河内部构型递进式建模方法

为了精细刻画辫状河储层内部构型单元,提出了一种基于目标逐层递进式约束的建模方法。具体实现过程为通过基于目标的算法依次生成三个目标体:复合河道、心滩和落淤层,并设置相应规则使其满足辫状河构型模式,同时结合现代沉积和野外露头统计分析得到的经验数据与公式,来约束各目标体的参数分布范围,从而控制其在平面和剖面上的几何形态和规模,形成一套完整的递进式建模技术流程。该方法能够较好地刻画不同级次构型单元的几何形态、空间分布和相互之间的关系,生成的三维模型比较符合辫状河地质模式,实现了辫状河内部构型的三维表征,为剩余油的挖潜提供借鉴。

Progressive modeling method of braided river internal architecture

In order to finely describe braided river reservoirs,a progressive object-based modeling method is proposed.The concrete realization process is as follows:First,the combination channel,the bar and the interlayer are successively generated by object-based algorithm.Then the corresponding rules are set to meet the braided river architecture pattern.Second,the empirical data and formulas obtained from the statistical analysis of modern sediment and outcrops are used to constrain the parameter distribution range of each object,so as to control the geometry of the object in plane and section.Finally,a complete set of progressive architecture modeling techniques is developed.This method not only can reasonably describe the geometry,spatial distribution and the mutual relationship among the different level architecture units,but also can generate the three-dimensional model conforming to the braided river geological model.It realizes the three-dimensional characterization of the braided river internal architecture,which provides a strong basis for the remaining oil.