[1]姜素华,张 雯,李三忠,等.西北太平洋洋陆过渡带新生代盆地构造演化与油气分布特征[J].大地构造与成矿学,2018,(优先出版):839-857.[doi:10.16539/j.ddgzyckx.2019.04.014]
 JIANG Suhua,Zhang Wen,LI Sanzhong,et al.Cenozoic Oil-gas Distribution and Tectonic Evolution of the Basins in the Northwest Pacific Continent-ocean Connection Zone[J].Geotectonica et Metallogenia,2018,(优先出版):839-857.[doi:10.16539/j.ddgzyckx.2019.04.014]
点击复制

西北太平洋洋陆过渡带新生代盆地构造演化与油气分布特征
分享到:

《大地构造与成矿学》[ISSN:ISSN 1001-1552/CN:CN 44-1595/P]

卷:
期数:
2018年优先出版
页码:
839-857
栏目:
出版日期:
2019-12-30

文章信息/Info

Title:
Cenozoic Oil-gas Distribution and Tectonic Evolution of the Basins in the Northwest Pacific Continent-ocean Connection Zone
作者:
姜素华 张 雯 李三忠 汪 刚 曹 伟 索艳慧 陆蕾蕾 姜 衍 赵斐宇
Author(s):
JIANG Suhua Zhang Wen LI Sanzhong WANG Gang CAO Wei SUO Yanhui LU Leilei JIANG Yan and ZHAO Feiyu
关键词:
西北太平洋 洋陆过渡带 新生代盆地 构造演化 油气分布特征
Keywords:
Northwest Pacific continent-ocean connection zone Cenozoic basins tectonic evolution oil and gas distribution
DOI:
10.16539/j.ddgzyckx.2019.04.014
文献标志码:
A
摘要:
西北太平洋洋陆过渡带发育众多新生代盆地, 盆地的起源、发生、发展受控于大陆边缘不同时期的构造过程。本文基于板块运动对盆地形成发展和演化的控制作用, 分析盆地的形成和演化与洋、陆板块的相互作用, 重新厘定了该区地壳的反演厚度和地热场特征, 进一步证实洋陆过渡带盆地的地壳厚度从陆缘区到深海洋盆区具有递变减薄的规律, 而地热值向洋盆区具有逐渐升高的特征, 并发现盆地伸展强度与热流值具有很好的相关性。太平洋板块、印度板块和欧亚板块的演化对洋陆过渡带沉积盆地的沉降及充填具有控制作用, 沉降沉积中心由陆向海迁移导致烃源岩及油气具分带性, 并受控于盆地的古地温及地温梯度。盆地类型和沉积充填厚度控制了油气的分布规律: 陆内(陆缘)走滑?分盆地(渤海湾盆地和珠江口盆地等)油、气共生; 陆缘走滑?展盆地(琼东南盆地等)和伸展?滑盆地(莺歌海等盆地)以成气为主。日本已发现的油气主要围绕着日本岛弧分布, 弧后盆地和弧前盆地均具有油气分布。天然气水合物分布在高压低地温场的稳定带区域, 无机CO2气藏的分布与深大断裂和岩浆活动有关。
Abstract:
A series of Cenozoic basins developed along the Northwest Pacific Continent-Ocean Connection Zone. The origin, occurrence and development of these basins were controlled by different periods of marginal tectonic processes of East Asia. From the aspect of plate tectonics, we aim to analyze how these basins’ formation associated with the ocean/continental interaction processes during the Cenozoic. We inversed the crust thickness of the Northwest Pacific Continent-Ocean Connection Zone, and collected the newest marine geothermal data. The results confirm that the crust properties and thickness of the Northwest Pacific Continent-Ocean Connection Zone are characterized by a gradual thinning from the continental margin to the deep sea basins, reflecting a seaward strengthen of extension. And the terrestrial heat flows and geothermal fields of the basins also get increased towards sea, showing good correlation with their extension strength. The evolution of the Pacific, India and Eurasian plates generally controlled the hydrocarbon accumulation in these basins along the Northwest Pacific Continent-Ocean Connection Zone. The seaward migration of depocenters caused the stepwise changing and banded distribution of the basins’ source rocks and reservoirs. The development of source rocks was also controlled by the paleo-geothermal field and its gradient. And the effective reservoirs are ultimately determined by the total infill thickness and, partly, the tectonic genesis of the basins. For instance, the continental margin strike-slip pull-apart basins and intra-continental strike-slip pull-apart basins such as the Bohai Bay Basin and Pearl River Mouth Basin are characterized by coeval oil and gas accumulation; the continental margin trans-tensional basins such as the Qiongdongnan Basin and the extensional strike-slip basins such as the Yinggehai Basin are mainly characterized by gas accumulation. In Japan, the discovered oil and gas fields are mainly distributed around the Japan Islands, with oil and gas accumulated in both back-arc and fore-arc basins. Faults are also important for hydrocarbon migration and accumulation. The distribution of inorganic CO2 traps is closely correlated with the magmatic activities along the deep-seated faults. The gas hydrates are mainly accumulated in stable zones with high pressure and low geothermal field. In all, the oil and gas distribution characteristics of the West Pacific Continent- Ocean Connection Zone are properly clarified.
更新日期/Last Update: 2019-08-04