基于重磁资料的南黄海中部隆起有利构造带分析

南黄海中部隆起中、古生界海相地层发育，是目前勘探的重点领域。然而由于勘探程度较低，无钻井和三维地震资料，二维地震资料品质不佳，严重影响了该区域的勘探进程。因此，中、古生代地层的分布情况和厚度成为目前亟待解决的问题。此文以研究区现有的重、磁资料为基础，并结合地震解释成果及周边钻井资料，对南黄海中部隆起古生代地层的分布和厚度进行反演和解释，形成了该区域的典型构造剖面、主要地质界面深度图和上、下古生界厚度图。同时，通过与苏北盆地进行对比分析，依据重磁异常的特征，对中部隆起区重磁异常进行分类和解释，找出有利勘探区与重磁异常特征的对应关系，最终以此为依据，提出重磁异常低的区域，古生界厚度大，是南黄海中部隆起区的有利勘探区带，为该区域勘探目标优选提供另一种思路。

Analysis of Favorable Exploration Area in the Central Uplift of South Yellow Sea Basin Based on Gravity and Magnetic Data

The Mesozoic-Paleozoic marine strata are well developed in the Central Uplift of South Yellow Sea Basin, and are the main exploration feld at present. The scarce of exploration wells and 3D seismic data, together with the poor quality of 2D seismic data have hindered the exploration process in the study area. One of the geological problems to be urgently solved is the recognition of the distribution and thickness of the Mesozoic-Paleozoic marine strata. Based on the gravity and magnetic data available, combined with the interpretation and inversion of 2D seismic data and drilling information from the adjoining wells, a series of geological maps were mapped, including typical tectonic sections, depth maps of major geological interface, thickness maps of upper and lower Paleozoic. Based on the classifcation and interpretation of gravity and magnetic anomalies occurring in the Central Uplift and the comparison with SuBei Basin, the authors summarized the corresponding relation between the favorable exploration area and gravity and magnetic anomaly. Accordingly, the authors pointed out that the Paleozoic is thick in the area with low gravity and magnetic anomaly, and is to be the favorable exploration area. It gives another idea for predicting the favorable exploration area in the Central Uplift.