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A seismic quantitative identification method of slope break belt

机译：坡折带地震定量识别方法

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摘要

Based on the slope variation characteristics of slope break belt and slope theory in geomorphology, a method, which can quantitatively identify the slope break belt based on the precise seismic horizon data and slope gradient and aspect attribute, was established, and the mathematic surface model, dip logging, seismic attributes, and formation thickness contours were used to verify this method. Then, this method was used to quantitatively identify the distribution range and geometric parameters of the slope break belt in the Lower Cretaceous Qingshuihe Formation in Chepaizi area of Junggar Basin, NW China, the results show that the formation slope gradient calculated by this method is consistent with that reflected by the dip logging data, the distribution range of the slope break belt identified by this method is in line with the trend of the formation thickness and the distribution range of the discovered stratigraphic-lithologic reservoir, and the slope gradient attribute is better than formation dip attribute in identifying the slope break belt. The geometric parameters of the slope break belt which this method can identify are the accurate location of slope break and slope toe, the value of the slope gradient and the height difference and width between the slope break and slope toe.
机译：根据坡折带的坡度变化特征和地貌学的坡度理论，建立了一种基于精确地震层位数据，坡度和坡向属性定量识别坡折带的方法，并建立了数学地表模型，使用倾角测井，地震属性和地层厚度等高线来验证该方法。然后，利用该方法对西北准Jung尔盆地车排子地区下白垩统清水河组坡折带的分布范围和几何参数进行了定量识别，结果表明该方法计算出的地层坡度梯度是一致的。根据倾角测井资料反映的结果，用该方法确定的坡折带的分布范围与地层厚度趋势和发现的地层岩性油藏的分布范围相吻合，坡度梯度属性较好。比地层倾角属性更能识别坡折带。该方法可以识别的坡折带的几何参数是坡折和坡脚的准确位置，坡度的值以及坡折和坡脚之间的高度差和宽度。

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