【摘要】 针对勘探程度较低的复杂断陷盆地,利用常规剥蚀厚度恢复方法无法准确恢复其剥蚀厚度的问题,提出了1种基于构造演化研究的剥蚀厚度恢复方法,即从剥蚀动力学角度出发,分析剥蚀的成因机制,利用构造演化研究的平衡剖面,用地震资料界定剥蚀范围和求取剥蚀厚度,再根据已确定剥蚀区域的实际钻井资料情况,采用沉积速率法、波动分析法等进行井震结合的剥蚀厚度恢复。并以渤海湾盆地济阳坳陷孔店组为例,对孔一段(Ek1)和孔二段(Ek2)剥蚀厚度进行了恢复,结果表明:孔一段(Ek1)受剥蚀作用较强,在区域上存在较大差异,总体上剥蚀厚度较大,而孔二段(Ek2)受剥蚀作用较弱,剥蚀厚度较薄。该方法比传统的单一方法更加精确可靠,对恢复复杂断陷盆地剥蚀厚度具有较好的效果。更多还原

【Abstract】 It’s difficlut to recover the erosion thickness precisely by common methods for the complex fault basin,which has a low degree of prospecting.So a new way based on structure evolution for recovering erosion thickness has been proposed.According to the dynamic of erosion,it can analyse contributing factors of erosion,divide areas of erosion and calculate the worth of erosion thickness by using structure evolution sections and the seismic data.Based on the integration of well and seismic in main erosion area,the erosion amounts of local layers were calculated by means of the sedimentary rate,wave analysis.Taking Kongdian formation of Jiyang depression in Bohai bay basin as an example,Ek1 and Ek2’s erosion thickness were recovered.The result showed that Ek1 was denuded more seriously and the one area differs from another greatly.But a whole,the erosion thickness of Ek1 was thicker than Ek2.Eventually,this method was more accurate than others,which could be used to recover the erosion thickness of the complex fault basin precisely.更多还原