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二连盆地为我国一个中型油气区。本文在对研究区重磁资料统一拼接、处理基础上,通过分析重磁资料反映的地质结构信息,结合区域地震资料,推断了该区上古生界地质结构。综合研究认为,二连盆地上古生界受深大断裂控制,在西拉木伦河断裂以北上古生界残余厚度较大,并形成两个厚度中心,即二连—苏尼特右旗厚度中心和西乌珠穆沁旗—东乌珠穆沁旗厚度中心。前者厚度为3000m,后者上古生界厚度大、分布广,最厚可达6300m,是后续研究的重要目标区。
Erlian Basin is a medium-sized oil and gas region in our country. Based on the unified splicing and processing of gravity and magnetic data in the study area, this paper deduces the geological structure of Upper Paleozoic in this area by analyzing the geological structure information reflected by gravity and magnetic data and combining regional seismic data. The comprehensive study suggests that the Upper Paleozoic in the Erlian Basin was controlled by the deep fault, and the Paleozoic remnant thickness is larger in the north of the Xalamulun fault and formed two thickness centers, ie, the Erlian-Sunit Right Banner thickness Center and West Ujimqin Banner - East Ujimqin Banner Thickness Center. The former has a thickness of 3000 m. The latter is large in thickness and widely distributed in the Paleozoic, with a maximum thickness of 6300 m, which is an important target area for subsequent research.