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    致密储层石油充注成藏过程分析:以准噶尔盆地吉木萨尔凹陷二叠系芦草沟组为例

    郑民 李建忠 王文广 李鹏 杨海波 吴晓智 于京都

    郑民, 李建忠, 王文广, 李鹏, 杨海波, 吴晓智, 于京都, 2018. 致密储层石油充注成藏过程分析:以准噶尔盆地吉木萨尔凹陷二叠系芦草沟组为例. 地球科学, 43(10): 3719-3732. doi: 10.3799/dqkx.2017.609
    引用本文: 郑民, 李建忠, 王文广, 李鹏, 杨海波, 吴晓智, 于京都, 2018. 致密储层石油充注成藏过程分析:以准噶尔盆地吉木萨尔凹陷二叠系芦草沟组为例. 地球科学, 43(10): 3719-3732. doi: 10.3799/dqkx.2017.609
    Zheng Min, Li Jianzhong, Wang Wenguang, Li Peng, Yang Haibo, Wu Xiaozhi, Yu Jingdu, 2018. Analysis of Oil Charging and Accumulation Processes in Tight Reservoir Beds: A Case Study of Lucaogu Formation in Jimsar Sag of Junggar Basin, NW China. Earth Science, 43(10): 3719-3732. doi: 10.3799/dqkx.2017.609
    Citation: Zheng Min, Li Jianzhong, Wang Wenguang, Li Peng, Yang Haibo, Wu Xiaozhi, Yu Jingdu, 2018. Analysis of Oil Charging and Accumulation Processes in Tight Reservoir Beds: A Case Study of Lucaogu Formation in Jimsar Sag of Junggar Basin, NW China. Earth Science, 43(10): 3719-3732. doi: 10.3799/dqkx.2017.609

    致密储层石油充注成藏过程分析:以准噶尔盆地吉木萨尔凹陷二叠系芦草沟组为例

    doi: 10.3799/dqkx.2017.609
    基金项目: 

    国家科技重大专项 2016ZX05046-001

    国家科技重大专项 2017ZX05008-006

    详细信息
      作者简介:

      郑民(1979-), 男, 高级工程师, 博士, 主要从事油气资源战略及石油地质综合研究

    • 中图分类号: P618

    Analysis of Oil Charging and Accumulation Processes in Tight Reservoir Beds: A Case Study of Lucaogu Formation in Jimsar Sag of Junggar Basin, NW China

    • 摘要: 作为油气地质领域研究的热点和难点,单一研究手段很难理清致密油充注成藏机理和运聚成藏过程.以准噶尔盆地吉木萨尔凹陷二叠系芦草沟组致密油层为例,通过充注物理模拟实验与成岩-成储-成藏过程分析相结合,分析研究致密油运聚成藏过程.芦草沟组烃源岩自晚三叠世(对应的地层中Ro=0.5%)开始进入生油窗,在中侏罗世(对应的地层中Ro=0.7%)进入大量生烃阶段,至今仍处于生油阶段.烃类包裹体研究表明,吉木萨尔凹陷主要有两期成藏,一期在侏罗纪,包裹体均一温度在50~70 ℃;第二期是在白垩纪-古近纪,包裹体均一温度在120 ℃左右.吉木萨尔凹陷芦草沟组致密储层成岩阶段可划分为三个阶段:①早成岩A期:晚二叠世早期(260 Ma)及之前;②早成岩B期:晚二叠世早期至晚三叠世时期(距今260~220 Ma);③中成岩A期:晚三叠世至今(220~0 Ma).根据成岩演化阶段与生烃成藏过程分析,结合致密储层充注模拟实验结论,认为芦草沟组致密油成岩-成储-成藏过程可分为3个阶段:(1)早期储层中-高孔渗条件下低熟油气的充注阶段(晚三叠世之前);(2)边致密边成藏及改变岩石表面为油润湿性阶段(晚三叠世至早白垩世末期);(3)芦草沟组致密层中成熟油的持续充注阶段(早白垩世末期至今).吉木萨尔凹陷芦草沟组致密油资源潜力大,上甜点体(B段)致密油地质资源量约为4.45×108 t,下甜点体(E段)致密油地质资源量约为7.95×108 t.

       

    • 图  1  吉木萨尔凹陷芦草沟组试油成果

      Fig.  1.  Result of yielding tests for Lucaogou Formation in Jimsar Sag

      图  2  吉木萨尔凹陷芦草沟组致密储层物性分布直方图

      Fig.  2.  Histograms about the characteristics in permeability (a) and porosity (b) of the tight reservoir of Lucaogou Formation in Jimsar Sag

      图  3  研究区芦草沟组储层毛细管压力曲线及喉道类型

      Fig.  3.  Curves acquired in the tests for capillary pressure and types of throats existed in the pore system of tight reservoir of Lucaogou Formation in the study area

      图  4  吉木萨尔芦草沟组储集空间类型分布

      Fig.  4.  Distributional characteristics in pore volumes contributed by different pore types existed in the tight reservoir of Lucaogou Formation in Jimsar Sag

      图  5  吉木萨尔凹陷芦草沟组源储组合分类

      Fig.  5.  Classification of main types in the combination of source rock and reservoir of Lucaogou Formation in Jimsar Sag

      图  6  吉木萨尔凹陷芦草沟组致密储层成岩演化阶段与成岩作用分析

      Fig.  6.  Analytic diagram about the stage and the corresponding observed phenomenon in diagenetic effect in the tight reservoir of Lucaogou Formation in Jimsar Sag

      图  7  吉木萨尔凹陷芦草沟组致密储层充注期次及成藏

      Fig.  7.  Characteristics in infilling periods and oil accumulation occurred in the tight reservoir of Lucaogou Formation in Jimsar Sag

      图  8  吉木萨尔凹陷芦草沟组致密储层孔隙演化史

      Fig.  8.  History in the evolutive process of pore system of the tight reservoir of Lucaogou Formation in Jimsar Sag

      图  9  吉木萨尔凹陷芦草沟组致密储层成藏阶段分析

      Fig.  9.  Result of analysis for the key stages of tight reservoir forming and oil accumulation of Lucaogou Formation in Jimsar Sag

      图  10  吉木萨尔凹陷芦草沟组致密油资源丰度分布

      a.上甜点体(B段)致密油资源丰度;b.下甜点体(E段)致密油资源丰度

      Fig.  10.  Characteristics of the horizontal distribution about the abundance of tight oil of Lucaogou Formation in Jimsar Sag

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    • 收稿日期:  2018-04-20
    • 刊出日期:  2018-10-20

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