中国石油大学学报（自然科学版）2018，Vol.42Issue(2)：29-40,12.DOI:10.3969/j.issn.1673-5005.2018.02.004
渤海湾盆地潍北凹陷孔三段火山溢流相旋回与期次划分
Cycles and stages division of volcanic effusive phase of the third member of Kongdian Formation in Weibei Sag, Bohaiwan Basin
摘要
Abstract
The volcanic strata were widely developed in the 3rd member of Kongdian Formation of Weibei Sag,where the effec-tive reservoirs were mainly developed in effusive phases. Eruption cycles and stages of the effusive phases were categorized comprehensively using cores,logging and seismic data. The results show that volcanic rocks can be divided into two eruptive cycles and seven eruptive stages. Each eruptive cycle can be vertically divided into three subfacies: the upper subface, the central subfaces and the lower subface,respectively. Air holes and almond constructions were developed in the upper subface, which is the best reservoir type of volcanic rocks. According to the scale of lava flows, effusive phases are divided into two types,progradational and retrogradational cycles. Favorable reservoirs are mainly distributed in the upper part of the prograda-tional layers,and the lower part of the retrogradational layers. Progradational layers have larger scales, developed during the early eruption(from 4th to 7th) stages;while retrogradational layers have smaller scales,developed during later eruption(from 1st to 3rd) stages. It is suggested that early volcanic activities were intensive,which were gradually weakened through time.关键词
火山岩/溢流相/喷发旋回/期次/潍北凹陷/渤海湾盆地Key words
volcanic/effusive phase/eruptive cycle/eruptive stage/Weibei Sag/Bohai Bay Basin分类
天文与地球科学引用本文复制引用
孙耀庭,徐守余,买买提吐尔逊·库吐鲁,郭玉新,赵约翰,刘静..渤海湾盆地潍北凹陷孔三段火山溢流相旋回与期次划分[J].中国石油大学学报（自然科学版）,2018,42(2):29-40,12.基金项目
国家科技重大专项(2011ZX05006) （2011ZX05006）
