Characteristics of the basement reformed volcanic edifice in Bohai Sea and its implication for hydrocarbon enrichment
作者机构：CNOOC China LimitedTianjin BranchTianjin300452China
出 版 物：《Petroleum Research》 (石油研究（英文）)
年 卷 期：2017年第2卷第4期
页 面：336-346页
核心收录：
学科分类：0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0818[工学-地质资源与地质工程] 0816[工学-测绘科学与技术]
基 金：supported by National Science and Technology Major Project of China(2016ZX05024-003)
主 题：The reformed volcanic edifice Eruptive facies Weathering crust High-quality reservoir Yixian formation Bohai Sea
摘 要：The intact volcanic edifice had been formed and finalized during the depositional stage of Mesozoic Yixian Formation in the Bohai *** residual body of the intact volcanic edifice after reformation was defined as the basement reformed volcanic *** on drilling,seismic,well logging and microscopic data in the study area,characteristics of the basement reformed volcanic edifice were well discussed,and its control on oil and gas was also *** showed that the basement reformed volcanic edifice was jointly controlled by magmatic property,paleo-geomorphology and late reformation,and the late fault cutting and differential denudation were major reformation ways of the volcanic edifice;strong and weak volcanic eruption patterns developed in the study belonged to the invertedsequence eruption,and the explosive facies and the intermediate-acidic or acidic effusive facies were the favorable reservoir facies;weathering,cycles and period boundaries controlled vertical distribution of high-quality lithofacies,and coupling between each periodic interface at different levels and residual high-quality lithofacies was the key to oil and gas *** exploration targets of volcanic rocks were to find periodic interfaces in the volcanic edifice with the residual high-quality lithofacies within 150 m from the weathering crust or eruption surface.
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