大杨树盆地火山岩重力场影响消除和基底结构特征  

Elimination of the gravity field effect and the basement structural characteristic of the volcanic rocks in Dayangshu Basin

作　　者：高春文[1] GAO Chunwen(Exploration Department of Daqing Oilfield Co Ltd, Daqing 163453, China)

机构地区：[1]大庆油田有限责任公司勘探事业部,黑龙江大庆163453

出　　处：《大庆石油地质与开发》2020年第5期141-147,共7页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项“大型岩性油气藏形成主控因素与有利区带评价”(2017ZX05001-002);中国石油天然气股份公司“十三五”重大科技专项“海拉尔—依舒等外围盆地勘探技术完善与效益增储”(2016E-0202)。

摘　　要：大杨树盆地为火山建造盆地,由于浅部甘河组火山岩发育,使得在大杨树盆地难以取得反映沉积层特征较好的地震资料。通过采用匹配滤波,提取甘河组火山岩磁异常,进行岩性重力校正,剥离甘河组重力响应,提取剩余重力异常,较好地反映了九峰山组沉积地层引起的重力异常,计算的基底深度与钻井实际深度吻合较好。大杨树盆地南部主要发育北北东向和北西西向2组断裂,由玉林屯、太平川和大库木3个凹陷组成,玉林凹陷面积最大,大杨树盆地南部具有较大油气勘探潜力。Dayangshu Basin is a volcanic formation basin,and it is difficult to obtain the seismic data reflecting the characteristics of the sedimentary strata due to the development of the volcanic rocks of Ganhe Formation in the shallow part of the basin.With the help of the matched filtration,the magnetic anomaly in the volcanic rocks of Ganhe Formation was extracted to correct the lithologic gravity,strip the gravity response of Ganhe Formation and extract the residual gravity anomaly,thus the gravity anomaly caused by Jiufengshan-Formation sedimentary strata can be well reflected,and moreover the coincidence between the calculated basement depth and the actual drilled depth is pretty better.In South Dayangshu Basin,two-group faults in NNE and NWW direction are mainly developed,which are composed of Botulin,Taipingchuan and Dakumu Sags.Yulin Sag has the largest area and South Dayangshu Basin has a great potential for oil and gas exploration.

关 键 词：大杨树盆地 重磁异常 岩性校正 火山岩 

分 类 号：TE121[石油与天然气工程—油气勘探]