定量确定地层超覆线位置的地震反射夹角外推法

陈家庄凸起东段北部缓坡带主要发育馆下段地层超覆油气藏，准确确定地层超覆线位置对于指导该区油气勘探具有重要意义。根据研究区勘探现状、地层结构特征及对古地貌的认识对地层超覆油藏进行了正演模拟，结果表明，在地层超覆线附近的地震反射同相轴上，尖灭点位置受不整合面倾角和地层倾角等因素控制，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。将此方法应用于研究区馆下段地层超覆油气藏勘探，得到垦68井垦69井在馆下段2+3砂组连片含油的结论。

Quantitative determination of overlap line position via extrapolation of angle of seismic reflection

Stratigraphic overlapped reservoirs are well developed in Guantao Formation in northern slope of the Eastern Chenjiazhuang Uplift.The position of overlap line is vital for guidance of exploration for oil and gas in this area.Forward modeling was carried out under the constraint of stratigraphic configuration and palaeogeomorphologic characters.It is showed that near overlapped points,pinchout is mainly controlled by unconformity dip and stratal dip,and the position of overlap line can be determined quantitatively by extrapolating along seismic event.By applying this method to the overlapped reservoirs of Guantao Formation in northern slope of the Eastern Chenjiazhuang Uplift,we concluded that the 2 3 sands in the lower segment of Guantao Formation are connected and oil-bearing between well K68 and K69.