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济阳坳陷孤岛与埕岛潜山油气差异富集原因分析

赵凯 蒋有录 刘华 胡洪瑾 徐昊清

赵凯, 蒋有录, 刘华, 等, 2018. 济阳坳陷孤岛与埕岛潜山油气差异富集原因分析. 地质力学学报, 24 (2): 220-228. DOI: 10.12090/j.issn.1006-6616.2018.24.02.023
引用本文: 赵凯, 蒋有录, 刘华, 等, 2018. 济阳坳陷孤岛与埕岛潜山油气差异富集原因分析. 地质力学学报, 24 (2): 220-228. DOI: 10.12090/j.issn.1006-6616.2018.24.02.023
ZHAO Kai, JIANG Youlu, LIU Hua, et al., 2018. ANALYSIS ON THE CAUSES OF DIFFERENT ENRICHMENT OF HYDROCARBON IN GUDAO AND CHENGDAO BURIED-HILLS, JIYANG DEPRESSION. Journal of Geomechanics, 24 (2): 220-228. DOI: 10.12090/j.issn.1006-6616.2018.24.02.023
Citation: ZHAO Kai, JIANG Youlu, LIU Hua, et al., 2018. ANALYSIS ON THE CAUSES OF DIFFERENT ENRICHMENT OF HYDROCARBON IN GUDAO AND CHENGDAO BURIED-HILLS, JIYANG DEPRESSION. Journal of Geomechanics, 24 (2): 220-228. DOI: 10.12090/j.issn.1006-6616.2018.24.02.023

济阳坳陷孤岛与埕岛潜山油气差异富集原因分析

doi: 10.12090/j.issn.1006-6616.2018.24.02.023
基金项目: 

国家油气重大专项课题 2016ZX05006-003

国家自然科学基金 41372132

中央高校基本科研业务费专项 16CX06045A

详细信息
    作者简介:

    赵凯(1992-), 男, 博士研究生, 研究方向为油气成藏机理与分布规律。E-mail:zhaokai0529@126.com

  • 中图分类号: TE122.2

ANALYSIS ON THE CAUSES OF DIFFERENT ENRICHMENT OF HYDROCARBON IN GUDAO AND CHENGDAO BURIED-HILLS, JIYANG DEPRESSION

  • 摘要: 济阳坳陷孤岛潜山和埕岛潜山油气富集程度差异悬殊,目前原因尚不清楚。在相关研究的基础上,通过分析烃源岩有机地化、储盖层物性等特征,对孤岛、埕岛潜山油气成藏条件进行对比并剖析造成油气差异富集的控制因素。研究表明,孤岛潜山和埕岛潜山被多个生烃洼陷所环绕,两者均具有充足的油源;孤岛潜山溶蚀孔洞、裂缝发育差,导致油气向潜山内部充注效率低;而埕岛潜山溶蚀孔、洞、缝发育好,油气向潜山内部充注效率高,故潜山储层特征差异是导致两潜山油气差异富集的主要原因;孤岛潜山东营组遭受剥蚀,潜山顶部风化壳储层与馆陶组下段砂体直接接触,潜山风化壳圈闭缺少有效遮挡条件,导致潜山油气可以在剥蚀处进入馆陶组,缺失了潜山成藏的保存条件,与之相比,埕岛潜山发育良好盖层,为油气聚集提供了遮挡条件,保障了规模性潜山油气藏的形成。

     

  • 图  1  埕岛潜山和孤岛潜山构造位置及地层发育图

    Figure  1.  Tectonic location and stratigraphic development map of Chengdao and Gudao buried-hills

    图  2  埕岛地区和孤岛地区油气运聚模式图及油气纵向分布比例

    Figure  2.  Reservoir profiles and vertical distribution porportion of hydrocarbon in different layers of Gudao and Chengdao buried-hills

    图  3  埕岛潜山和孤岛潜山裂缝及溶蚀孔洞发育特征

    a—埕岛潜山裂缝,埕古5井,2615 m;b—埕岛潜山溶蚀孔洞,埕古5井,2473 m;c—孤岛潜山裂缝,孤古21井2806 m;d—孤岛潜山溶蚀孔洞,孤古3井2056 m

    Figure  3.  Development characteristics of fractures and dissolution pores of Chengdao and Gudao buried-hills

    图  4  埕岛潜山油气藏纵向分布特征与盖层关系示意图

    Figure  4.  The relationship between longitudinal location of buried oil reservoirs and cap rocks in Chengdao area

    图  5  孤岛潜山东营组剥蚀区连井指示图

    Figure  5.  Indicating diagram of connecting-well in denudation area of the Dongying formation of Gudao buried-hill

    表  1  埕岛潜山和孤岛潜山油源条件评价参数

    Table  1.   Evaluation parameters of hydrocarbon source conditions of Chengdao and Gudao buried-hills

    油气来源 埕岛潜山 孤岛潜山
    埕北凹陷 渤中凹陷 桩东凹陷 渤南洼陷 孤南洼陷 孤北洼陷
    烃源岩 Es3 Es1 Es3 Es1 Ed Es3 Es1 Es4 Es3 Es1 Es3 Es1 Es3 Es1
    有机质类型 Ⅰ、Ⅱ1 1 2 1 1 1 Ⅰ、Ⅱ1 Ⅰ、Ⅱ1 1 1
    生烃强度/(104 t/km2) 100~1400 30~250 50~1100 20~360 30~620 50~400 50~450 10~400 50~1200 30~450 50~1200 50~450 50~600 50~250
    有机质成熟度 成熟 低熟 高熟 高熟 成熟 高熟 成熟 成熟 成熟 低熟 成熟 低熟 成熟 低熟
    TOC/% 3.2~3.4 3.7~4.1 2.9~3.4 1.3~4.1 1.0~3.0 1.8~2.3 < 1.0 0.6~2.0 2.6~4.0 2.0~4.0 3.6~4.8 3~4.6 1.8~2.9 1.6~2.1
    暗色泥岩厚度/m 350~400 90~108 300~1000 30~80 250~1300 100~500 30~120 80~350 50~750 0~450 90~500 0~300 50~350 0~150
    综合评价 较好 较好 较好 中等
    下载: 导出CSV

    表  2  孤岛潜山和埕岛潜山的缝洞发育特征描述

    Table  2.   Description of development characteristics of fractures and caverns in Gudao and Chengdao buried-hills

    孤岛潜山 埕岛潜山
    井号 深度/m 层位 孔、缝、洞发育特征 井号 深度/m 层位 孔、缝、洞发育特征
    孤古3井 2062 O 高角度裂缝宽2 mm 胜海古2 2422.5 O 裂缝宽7 mm
    孤古12井 2246 O 高角度裂缝宽1.5 mm 埕北古4 3217 O 裂缝宽5 mm,晶洞直径7 mm
    孤古15井 2133 O 溶洞粒径2 mm,裂缝宽1 mm 埕北古4 3355 O 裂缝宽10 mm
    孤古15井 2300 O 晶洞直径5 mm 桩海102 4305 O 晶洞直径10 mm
    孤古16井 2426 O 裂缝宽1.5 mm 桩海102 4318 O 裂缝宽3 mm
    孤古16井 3595 裂缝宽1 mm 桩海102 4457 O 裂缝宽5 mm
    孤古21井 1638 O 晶洞直径5 mm 桩海10 4240 O 晶洞直径6 mm
    孤古21井 2785 裂缝宽1 mm 埕北301 3335 O 晶洞直径7 mm
    孤古21井 2803 晶洞直径5 mm 埕北30 3142 O 裂缝宽3 mm,晶洞直径5 mm
    孤古21井 2812 裂缝宽3 mm 埕北30 3222 O 裂缝宽4 mm
    下载: 导出CSV

    表  3  埕岛潜山不同层系盖层物性表

    Table  3.   Physical properties of caprocks in different layers of Chengdao buried-hill

    井号 深度/m 层位 岩性 孔隙度/% 渗透率/×10-3μm2
    埕北242 2285 Ed 泥岩 1.39 1.603
    埕北242 2318 Ed 泥岩 1.21 0.828
    埕北242 2355 Ed 泥岩 1.15 0.551
    埕北11 2143 Ed 泥岩 1.43 0.458
    埕北11 2174 Ed 泥岩 1.24 0.837
    胜海古3 2340 Ed 泥岩 1.18 1.177
    胜海古3 2459 Ed 泥岩 1.09 0.89
    胜海古3 2826 O 泥岩 0.9 0.713
    胜海古3 2850 O 泥岩 0.77 0.76
    埕北30 3136 Mz 泥岩 1.37 0.542
    埕北30 3247 Mz 泥岩 1.18 0.415
    下载: 导出CSV
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  • 收稿日期:  2016-08-30
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