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大型、构造复杂的三维物理模型可用于模拟油气勘探。构造逼近实际地质状况的模拟具有制作技术难度大、质量控制严格等特点,可用于采集宽方位、多方位和全方位的地震数据,从而进行多种三维处理、解释方法验证。本文针对中国西部前陆盆地地表条件复杂地下构造复杂,导致成像不理想等问题,基于复杂的地下构造,设计制作了目前世界上模拟施工面积最大、构造最复杂的KS(塔里木盆地克深勘探工区)物理模型。本文的模型技术的进步主要涉及3个方面:模型的设计方法、模型的浇铸流程和数据采集,首次给出了物理模型的三维真实速度模型,定量分析了物理模型的制作精度,绝对误差小于3mm,可以满足方法试验的需要。该模型基于三维形态测量技术建立了三维真实速度模型,可作为方法试验的基础数据。因此,该模型可作为地震物理模拟技术的标准。
Large, complexly constructed three-dimensional physical models can be used to simulate oil and gas exploration. The simulation of constructing the approach to the actual geological conditions has the characteristics of difficult fabrication technology and strict quality control. It can be used to collect wide-azimuth, multi-azimuth and omni-directional seismic data and carry out a variety of three-dimensional processing and interpretation methods verification. In this paper, according to the complex subsurface structure, aiming at the complex subsurface geological conditions in the western foreland basin, the imaging conditions are not perfect, the KS with the largest simulated construction area and the most complicated structure in the world is designed and manufactured ) Physical model. The progress of the model technology in this paper mainly involves three aspects: the design method of the model, the casting flow of the model and the data collection. For the first time, the 3D real velocity model of the physical model is given. The accuracy of the physical model is quantitatively analyzed. The absolute error is less than 3mm , To meet the needs of the method test. The model establishes a three-dimensional real velocity model based on three-dimensional shape measurement technology, which can be used as the basic data for the method test. Therefore, the model can be used as the standard of seismic physics simulation technology.