八面河地区地层剥蚀线研究

地层剥蚀线在地震剖面上由于处在地层超覆或剥蚀削蚀点附近,受地震资料分辨率的限制,地震反射往往提前变弱或消失,依据地震资料追踪的地层超覆和剥蚀削蚀线与实际地层超覆和剥蚀削蚀线存在较大的差异,因而不能根据砂组顶面反射同相轴的特征来准确判断砂组超覆和剥蚀削蚀线的位置。如何准确确定地层剥蚀削蚀线的位置,对于正确认识地层油藏分布和规模,指导油气勘探开发具有重要意义。瞬时相位及地层剥蚀线综合外推法能有效地解决剥蚀削蚀线外推问题。

On the Stratum Erosion Lines of Bamianhe District

The stratum eroding line is located around the stratigraphic overlap or erosion point seen from the seismic profile.The limited resolution of seismic data tends to lead to immature waning or even disappearing of seismic reflection.This defect may result in large gap between the measuring results and real figures so that the traits of the lineups reflected from the top of the sand groups cannot be used to locate sand groups overlap and eroding line accurately.It’s of great importance to position stratum eroding lines precisely in order to know better the distribution and size of reservoirs for oil gas exploration.Extrapolating according to both the instantaneous phase and stratum eroding lines has been proved effective in deciding the location of eroding lines.