巴彦浩特盆地石炭系地球物理场特征及分布  

Geophysical field characteristics and distribution ofCarboniferous in Bayanhot Basin

作　　者：李燕丽 索孝东 石东阳 王少春 Liyangli;Suoxiaodong;Shidongyang;wangshaochun

机构地区：[1]东方地球物理公司 [2]中石油华北石油分公司

出　　处：《石油工业计算机应用》2021年第1期38-42,2,共6页Computer Applications Of Petroleum

基　　金：《李庆忠院士科研专项:课题2“GeoEast系统剔除拟合模块开发”》资助。

摘　　要：石炭系是巴彦浩特盆地主要勘探目的层,但因勘探程度低,地震深层资料品质较差,石炭系整体分布认识不清。平面上通过针对性采用滑动平均法和上延法对石炭系重力异常场进行分离提取,首次明确了石炭系重力异常近南北向成带分布特征;纵向上开展针对石炭系的电磁反演及重磁力-电磁联合反演解释,明确了石炭系对应次高阻层且厚度横向突变。研究结果表明石炭系主要分布在巴彦浩特盆地东部坳陷,整体南厚北薄,存在多个近南北向展布的厚度中心,具有垒堑相间的裂陷盆地结构,指出了盆地西南部是石炭系勘探的有利地区。利用重力、电磁资料进行巴彦浩特盆地石炭系研究取得了较好的地质效果。Carboniferous is the main exploration target inBayanhot basin,but due to the low degree of exploration and the poor quality of deep seismic data,the overall distribution of Carboniferous is not clear.In the plane,the Carboniferous gravity anomaly field was separated and extractedbythe moving average method and the upward continuation method,and the nearly north-south zonation distribution characteristics of the Carboniferous gravity anomaly are clarified for the first time;in the vertical,the electromagnetic inversion and gravity magnetic electromagnetic joint inversion interpretation are carried out for the Carboniferous,and it is clear that the Carboniferous corresponds to the sub high resistivity layer and the thickness has an abrupt change laterally.The results show that the Carboniferous is mainly distributed in the eastern depression of Bayanhot basin,which is thick in the South and thin in the north as a whole.There are several thickness centers distributed in nearly north-south direction,with the structure of a rift basin with alternatinghorsts and grabens.It is pointed out that the southwest of the basin is a favorable area for Carboniferous exploration.Good geological results have been obtained of the study onCarboniferous in Bayanhot basin using gravity and electromagnetic data.

关 键 词：巴彦浩特盆地 石炭系 重力 电磁 

分 类 号：P61[天文地球—矿床学]