碎屑物理模拟研究的理论与方法

THEORY AND METHOD OF PHYSICAL SIMULATION IN CLASTIC SEDINENTATION

张春生 刘忠保 施冬 贾爱林

Zhang Chunsheng Liu Zhongbao Shi Dong Jia Ailin

碎屑沉积体系的物理模拟是研究沉积过程的重要手段,也是预测油气储集砂体分布的有效方法之一。沉积过程的相似性是物理模拟成败的关键,为此模拟实验必须满足相似理论的基本要求。保持原型与模型沉积过程相似的基本理论是几何相似、运动相似及动力相似以及由此推导出的颗粒悬浮相似、颗粒运动相似和河床变形相似3个基本准则。某些相似条件在实验过程中不可能同时满足,此时应考虑满足影响沉积过程的主要条件。符合实际的地质模型和物理模型的建立是正确开展物理模拟的基础。在模型指导下的实验方案的确定是模拟实验的主要环节。

Physical simulation of clastic sedimentary system is an important resort of studying sedimentary process,it is also one of efficient methods of forecasting oil gas sandbody distribution.The similarity of sedimentary process is the key of physical simulaion.So simulating experiment must suffice resemble theory.Basin theory keeping sedimentary process of model similar to that of prototype is geometry resemblance,kinetic resemblance,dynamic resemblance and three deduced basic rules such as grain suspend resemblance,grain kinetic resemblance,river bed transfiguration resemblance.Some resemblance conditions can not be content in experiment at the same time,the main conditions influencing sedimentary process should be content first.The establishment of geology and physical models according to actual condition is the foundation of correct physical simulation;the determination of experiment project based on the models is the main link of the simulation.

10.11743/ogg20000403