无为盆地周冲村组膏盐层地震响应特征研究及其油气地质意义  

Seismic response characteristics of the gypsum-salt layer in the Zhouchongcun Formation of the Wuwei Basinand its petroleum geological significance

作　　者：齐尚星 谭静 喻兵良 熊强青 袁兴赋 吴通 汪玉玲 郑雪静 陈杰 QI Shangxing;TAN Jing;YU Bingliang;XIONG Qiangqing;YUAN Xingfu;WU Tong;WANG Yuling;ZHENG Xuejing;CHEN Jie(School of Resources and Environmental Engineering,Hefei University of Technology,Hefei 230009,Anhui,China;Geological Exploration Technology Institute of Anhui Province(Energy Exploration Center of Anhui Bureau of Geology and Mineral Exploration),Hefei 230031,Anhui,China;Nanjing Geological Survey Center of China Geological Survey,Nanjing 210016,Jiangsu,China)

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009 [2]安徽省勘查技术院(安徽省地质矿产勘查局能源勘查中心),安徽合肥230031 [3]中国地质调查局南京地质调查中心,江苏南京210016

出　　处：《地震工程学报》2024年第2期335-342,368,共9页China Earthquake Engineering Journal

基　　金：中国地质调查局项目《苏皖赣地区页岩油气战略选区调查》(DD20190565,DD20201171);《苏皖地区页岩气地质调查》(DD20190083)。

摘　　要：膏盐层作为油气田的主要盖层,对油气藏封存具有重要意义。文章在无为盆地开展二维地震勘探工作的基础上,运用井震联合对比分析方法,总结区域内膏盐层的地震响应特征,较细致地刻画无为盆地周冲村组膏盐层的厚度和空间分布规律。研究结果表明:膏盐层厚度与地震振幅属性具有一定的正相关性,地震振幅越强,膏盐层厚度越大;无为盆地膏盐层在纵向上厚度变化范围为45~540 m,横向上在盆地核心区和凹陷区膏盐层发育较厚,主体介于300~500 m之间,在盆地构造高点位置膏盐层发育较薄,主体介于50~150 m之间,膏盐层分布特征与无为盆地构造总体呈现“低厚高薄”规律。文章为无为盆地天然气和页岩气勘探突破提供了技术保障。The gypsum-salt layer,as the main cap rock of oil and gas fields,is of considerable importance for the sealing of oil and gas reservoirs.On the basis of a 2D seismic exploration in Wuwei Basin,the seismic response characteristics and spatial distribution regularity of the gypsum-salt layer in Zhouchongcun Formation were analyzed using the integrated analysis method of well logs and seismic data.Results indicate a certain positive correlation between the thickness of the gypsum-salt layer and the seismic amplitude attribute.A thick gypsum-salt layer leads to a strong seismic amplitude.The thickness of the gypsum-salt layer varies from 45 to 540 m in the longitudinal direction.Horizontally,the gypsum-salt layer is relatively thick in the core and depression areas of the basin,and the main part is between 300 and 500 m.The gypsum-salt layer is relatively thin in the structurally high position of the basin,and the main body is between 50 and 150 m.The distribution characteristics of the gypsum-salt layer generally show that the low tectonic position corresponds to a thick gypsum-salt layer,and the high tectonic position corresponds to a thin gypsum-salt layer.This study provides a technical guarantee for the breakthrough of natural and shale gas exploration in the Wuwei Basin.

关 键 词：无为盆地 膏盐层 地震响应 地震勘探 

分 类 号：P315.2[天文地球—地震学]