准噶尔盆地南缘高泉背斜战略突破与下组合勘探领域评价

doi:10.3969/j.issn.1672-7703.2019.02.001

摘要/Abstract

摘要： 准噶尔盆地南缘（简称准南）是该盆地油气勘探的战略接替区，高探1井下组合的战略突破，进一步证实了准南下组合油气勘探前景广阔。通过分段构造建模、分带落实下组合构造与圈闭特征，结合关键成藏要素匹配关系研究，深化了下组合大构造成藏条件认识。研究认为，①准南中-下侏罗统为主力烃源岩，资源潜力大；发育白垩系清水河组、侏罗系头屯河组和喀拉扎组等多套规模有效储层；白垩系吐谷鲁群区域性巨厚泥岩盖层普遍发育异常高压，具备良好的封盖能力。②准南下组合烃源岩、储层、盖层、圈闭静态成藏要素空间配置关系好；动态成藏要素时间配置关系好，圈闭形成早，构造形成期与主力烃源岩生排烃高峰期匹配，后期改造弱、保存条件好，具备形成大油气田的成藏条件。综合关键成藏要素分析，优选下组合近源背斜型圈闭吐谷鲁背斜、呼图壁背斜及东湾背斜作为准南天然气勘探的突破口。

关键词: 准噶尔盆地南缘, 下组合, 背斜构造, 成藏条件, 勘探突破

Abstract: The southern margin of the Junggar Basin is a strategic successor for oil and gas exploration, and the strategic breakthrough in exploration well Gao 1 further proved the promising future of the lower assemblage in the southern margin. According to the results of sectional structural modeling, structural analysis of the trap and the matching between accumulation conditions, the controlling factors of hydrocarbon accumulation in the lower assemblage was identified. The study results indicate (1) the lower Jurassic is primary source rock which has a large potential; the Cretaceous Qingshuihe Formation, Jurassic Toutunhe Formation and Khalza Formation are effective reservoirs with a certain scale; and the regional thick mudstone of the Cretaceous Tugulu Group at higher pressure is effective caprock with good sealing ability; (2) static elements (i.e. source, reservoir and cap rocks and traps) matched well in space, and dynamic elements matched well in time:the traps developed earlier, the forming of the structure was well consistent with the generating of hydrocarbon, later reconstruction was weak and the preservation conditions were good, which are good conditions for large-scale accumulation. Base on the comprehensive analysis above,near-source anticlinal traps, such as the Tugulu anticline, the Hutubi anticline and the Dongwan anticline, are proposed to make breakthrough to gas exploration in the southern margin of the Junggar Basin.

Key words: southern margin of Junggar Basin, lower assemblage, anticline, accumulation condition, exploration breakthrough

中图分类号:

何海清, 支东明, 雷德文, 杨迪生, 肖立新, 袁波, 齐雪峰, 赵进雍. 准噶尔盆地南缘高泉背斜战略突破与下组合勘探领域评价[J]. 中国石油勘探, 2019, 24(2): 137-146.

He Haiqing, Zhi Dongming, Lei Dewen, Yang Disheng, Xiao Lixin, Yuan Bo, Qi Xuefeng, Zhao Jinyong. Strategic breakthrough in Gaoquan anticline and exploration assessment on lower assemblage in the southern margin of Junggar Basin[J]. China Petroleum Exploration, 2019, 24(2): 137-146.

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