天然气工业2026，Vol.46Issue(9)：17-30,14.DOI:10.3787/j.issn.1000-0976.2026.09.002
从万米油气勘探实践看准噶尔盆地石炭系天然气发展前景
Evaluating the natural gas exploration potential of the Carboniferous reservoirs in the Junggar Basin from the perspective of 10 000-m oil and gas exploration practices
摘要
Abstract
Recently,significant achievements have been obtained in the exploration of ultra-deep oil and gas in China.The Well Xin'an 1,a wildcat well,drilled in the Junggar Basin in October 2025 has a total depth of 11 156 m.It is China's second completed 10 000-m scientific exploration well,as well as the first 10 000-m deep well targeting ultra-deep clastic rocks.To investigate the basic petroleum geological conditions of the 10 000-m deep strata in the Junggar Basin,this paper analyzes the geochemical characteristics and genetic origins of natural gas based on drilling,mud logging,and geochemical data of natural gas and source rocks,together with the basic petroleum geological conditions and drilling process of Well Xin'an 1.On this basis,the potential ultra-deep oil and gas exploration plays are identified.The following results are obtained.First,multi-stage fault conduit systems provide favorable conditions for vertically large-scale,efficient,and three-dimensional hydrocarbon accumulation in the area where Well Xin'an 1 is located.The 10 000-m deep clastic reservoir in this well has high shale content and poor physical properties,but sweet spots are still developed in local intervals,with abundant oil and gas shows observed.Second,the ultra-deep natural gas in Well Xin'an 1 is significantly enriched in 13C and has a high dryness coefficient,indicating that it is highly mature coal-derived gas generated from the source rocks of Upper Carboniferous Bashan Formation.Third,a set of coal-measure source rocks developed in the Bashan Formation is distributed throughout the basin;and the primary and secondary reservoirs associated with these source rocks represent the most realistic exploration targets in the Carboniferous petroleum system.Fourth,there are also Shiqiantan Formation marine source rocks developed in the Upper Carboniferous,which are mainly located in the central and southeastern parts of the Shiqiantan Sag,representing a"small but rich"exploration play.Fifth,the marine source rocks of the Lower Carboniferous Dishuiquan Formation exhibit wider distribution,better continuity and greater exploration potential than those of the Bashan Formation,and a large number of oil and gas shows derived from the Dishuiquan Formation source rocks have been identified in its overlying strata.In conclusion,Well Xin'an 1 has proved that the Carboniferous in the western Junggar Basin has favorable conditions for natural gas accumulation.This finding breaks the traditional understanding that only the Carboniferous in the eastern Junggar Basin has exploration potential,and underscores that the Carboniferous is a critical strategic replacement play of ultra-deep oil and gas in the Junggar Basin.关键词
万米井/超深层/准噶尔盆地/石炭系/石钱滩组/巴山组/滴水泉组/气源对比/资源潜力/勘探领域Key words
10 000-m well/Ultra-deep strata/Junggar Basin/Carboniferous strata/Shiqiantan Fm/Bashan Fm/Dishuiquan Fm/Gas-source correlation/Resource potential/Exploration field分类
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支东明,龚德瑜,唐勇,张士涛,周川闽,庞智文..从万米油气勘探实践看准噶尔盆地石炭系天然气发展前景[J].天然气工业,2026,46(9):17-30,14.基金项目
新疆维吾尔自治区科技计划项目"新疆超深层油气富集高产规律与效益建产关键技术研究"(编号:2024A01010)、新疆维吾尔自治区天山英才-科技创新领军人才支持项目(编号:2022TSYCLJ0070)、国家自然科学基金项目"准噶尔盆地凝灰质烃源岩发育环境与生烃潜力分析"(编号:41802177)、新型油气勘探开发国家科技重大专项项目"准噶尔盆地全油气系统与新领域勘探技术"(编号:2025ZD1400301). （编号:2024A01010）
