新疆地区含油气盆地深层—超深层成藏组合与勘探方向

doi:10.3969/j.issn.1672-7703.2021.04.001

摘要/Abstract

摘要： 近年来全球深层油气勘探开发呈现加快发展的趋势，不断获得多项重大油气发现，证实含油气盆地深层蕴含巨大的勘探潜力。新疆地区深层—超深层油气资源丰富，是稳定中国油气战略坚实的能源保障，但限于深层领域多，油气富集规律复杂，其勘探潜力及方向不是十分明确，进一步厘清新疆地区深层—超深层重点领域区带具有重要意义。通过对新疆地区大地构造背景及演化分析，对比研究了新疆地区三大盆地（塔里木盆地、准噶尔盆地、吐哈盆地）深层基础石油地质条件及油气成藏组合特征，系统梳理了三大盆地深层油气勘探领域，结合典型油气藏解剖，构建了新疆地区深层不同领域油气成藏模式，进一步明确了其控藏要素及油气分布特征。研究指出塔里木盆地寒武系盐下、库车前陆冲断带、塔西南山前带，准噶尔盆地中央坳陷二叠系—三叠系、南缘冲断带下组合、二叠系页岩油，吐哈盆地台北凹陷二叠系—三叠系、深层石炭系等区带油气成藏条件优越，是未来深层寻求规模储量及重大突破的重要勘探区带。

关键词: 新疆地区, 多旋回叠合盆地, 深层—超深层, 成藏组合, 勘探潜力, 勘探领域

Abstract: In recent years, the global petroleum exploration and development in deep formations have been accelerated and major discoveries achieved successively, proving great exploration potential of deep formations. The petroliferous basins in Xinjiang region have abundant oil and gas resources in deep to ultra-deep formations, which lays solid energy foundation and provides guarantee for China’s oil and gas strategy. However, exploration potential and targets are not clear due to the multiple exploration fields in deep formations and complex hydrocarbon enrichment law. As a result, the further identification of key exploration fields and oil and gas plays of deep to ultra-deep formations are of great significance. In this paper, geotectonic setting and its evolution in Xinjiang region are analyzed, basic petroleum geological conditions of deep formations and characteristics of oil and gas accumulation assemblages compared and studied in three major basins (Tarim, Junggar and Tuha Basins), and exploration fields of deep formations systematically studied of the three basins. By analyzing typical oil and gas reservoirs, various hydrocarbon accumulation patterns are established for different exploration fields of deep formations, and controlling factors of hydrocarbon accumulation and characteristics of oil and gas distribution further understood. The study results indicate that the hydrocarbon accumulation conditions are superior of deep formations in the Cambrian subsalt, foreland thrust belt in Kuqa Depression and piedmont area in the southwestern Tarim Basin, Permian-Triassic in the Central Depression, lower assemblage in the southern margin and shale oil of Permian in Junggar Basin, and Permian-Triassic in Taibei Sag and deep Carboniferous in Tuha Basin, which are important exploration plays to look for large-scale reserve and major breakthroughs in the future.

中图分类号:

TE112

匡立春, 支东明, 王小军, 李建忠, 刘刚, 何文军, 马德波. 新疆地区含油气盆地深层—超深层成藏组合与勘探方向[J]. 中国石油勘探, 2021, 26(4): 1-16.

Kuang Lichun, Zhi Dongming, Wang Xiaojun, Li Jianzhong, Liu Gang, He Wenjun, Ma Debo. Oil and gas accumulation assemblages in deep to ultra-deep formations and exploration targets of petroliferous basins in Xinjiang region[J]. China Petroleum Exploration, 2021, 26(4): 1-16.

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