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OA
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
近年来,中国在超深层油气勘探领域发展成效显著,2025 年 10 月完钻的准噶尔盆地风险探井——新安 1 井完钻井深 11 156 m,成为中国第二口完钻的万米探索井,也是首口针对超深层碎屑岩部署的万米深井.为探索准噶尔盆地万米深层基础油气地质条件,基于钻井、录井、天然气和烃源岩地球化学分析数据,结合新安 1 井的基础油气地质条件和钻探过程,分析天然气地球化学特征与成因来源,明确潜在的超深层油气勘探领域.研究结果表明:①多期断裂输导体系可为油气在新安 1 井所在区域纵向上规模、高效、立体成藏提供有利条件,该井万米埋深碎屑岩储层泥质含量较高、物性较差,但局部层段仍发育储层甜点,可见丰富的油气显示;②新安 1 井超深层天然气碳同位素显著富集 13C,干燥系数高,为上石炭统巴山组烃源岩生成的高成熟煤成气;③巴山组发育一套煤系烃源岩,全盆地皆有分布,围绕其形成的原生油气藏和次生油气藏是石炭系含油气系统最现实的勘探领域;④上石炭统还发育石钱滩组海相烃源岩,主体位于石钱滩凹陷的中部及东南部,是一个"小而肥"的勘探领域;⑤下石炭统滴水泉组海相烃源岩较巴山组烃源岩分布范围更广,连续性更好,勘探潜力更大,在其上覆地层中已识别出大量源自滴水泉组烃源岩的油气显示.结论认为,新安 1 井证实准噶尔盆地西部石炭系具备天然气成藏条件,打破石炭系仅东部具备勘探潜力的传统认识,石炭系是盆地超深层油气重要战略接替领域.
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.
支东明;龚德瑜;唐勇;张士涛;周川闽;庞智文
怀柔实验室(新疆研究院)中国石油勘探开发研究院怀柔实验室(新疆研究院)新疆互盈企业管理有限公司中国石油勘探开发研究院怀柔实验室(新疆研究院)
能源科技
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
10 000-m wellUltra-deep strataJunggar BasinCarboniferous strataShiqiantan FmBashan FmDishuiquan FmGas-source correlationResource potentialExploration field
《天然气工业》 2026 (9)
17-30,14
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).
评论