地震反射层夹角外推法定量确定地层超覆线位置——以陈家庄凸起东段北部缓坡带馆下段为例

Quantitatively determining position of stratigraphic overlap line by extrapolation method of angle included between seismic reflectors case of low Eg segment in northern gentle slope zone of eastern part of Chenjiazhuang salient

陈家庄凸起东段北部缓坡带主要发育了馆下段地层超覆油气藏,因此准确确定地层超覆线位置对于指导油气勘探具有重要意义。基于前人研究成果,本文依据地层超覆线正演模拟结果的分析认为,地层超覆线附近的地震反射同相轴尖灭点位置受不整合面倾角、地层倾角等因素的控制,沿着地震反射同相轴的变化趋势外推可定量确定地层超覆点的位置。该方法用于陈家庄凸起东段北部缓坡带馆下段超覆油气藏勘探,取得了满意效果。

Low Eg stratigraphic overlap reservoir is developed in northern gentle slope zone of east part of Chenjiazhuang salient, therefore, accurately determining the position of stratigraphic overlap line has important meaning to guide petroleum prospecting. Based on the studied results of predecessors and analyzing the results of forward simulation of stratigraphic overlap line, the paper considered that the factors such as angle of unconformity and stratigraphic angle control the position of pinchout point of se...