现代地质2024，Vol.38Issue(2)：312-321,10.DOI:10.19657/j.geoscience.1000-8527.2023.084
渤海湾盆地埕岛东部新近纪火山活动及其油气地质意义
Neogene Volcanism and Its Petroleum Geological Significance in the Eastern Chengdao,Bohai Bay Basin
摘要
Abstract
The volcanic activities in the Chengdao area in the middle of Bohai Bay Basin affect the development of reservoir,oil and gas migration and accumulation.The present studies mainly focus on the Mesozoic volcanic reservoir,however,the influence of the Neogene volcanic activities on the hydrocarbon accumulation are not fully understood.This restricts the further oil and gas exploration in the Eastern Chengdao.Based on the data from well logging,logging,and seismic studies,we investigated the volcanic rock lithology,lithofacies,and ac-tive characteristics,and further discussed the influence of the volcanic activities on the hydrocarbon accumula-tion processes.The volcanic rocks are mainly gray-black basalt,and the shape of volcanic cones is clear on the seismic section,with beaded or chain distribution on the plane.Based on the seismic facies and the electrical characteristics revealed by the drilling,the lithofacies of the Neogene bottom volcanic rocks can be divided into five types:volcanic channel facies,explosive facies,overflow facies,volcanic sedimentary facies,and intrusive facies.The volcanic activity began in the Early Neogene and lasted about 3-5 Ma before its ending,forming a localized angular unconformity and leading to the change of sedimentary environment from lake delta to braided river.With the volcanic activities and volcanic rock mass,the conditions of oil and gas transportation and lateral occlusion have been reshaped,and therefore a variety of oil and gas reservoir patterns have been established.We concluded that,the lithology relating to volcanic activities and volcanic rock mass occlusion type oil and gas reservoir are the main directions for the future explorations.关键词
渤海湾盆地/埕岛油田/新近纪/火山活动/油气成藏Key words
Bohai Bay Basin/Chengdao oilfield/Neogene/volcanic activity/hydrocarbon accumulation分类
天文与地球科学引用本文复制引用
张在振,曾溅辉,张本华,王志伟,刘金华,于世娜,武群虎,王艳珍..渤海湾盆地埕岛东部新近纪火山活动及其油气地质意义[J].现代地质,2024,38(2):312-321,10.基金项目
国家科技重大专项(2017ZX05049-004) （2017ZX05049-004）
中国石油化工股份有限公司科技攻关项目(P19017-6). （P19017-6）
