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    泌阳凹陷深凹区古流体压力演化与油气充注耦合关系

    张鑫 陈红汉 孔令涛 龙昭

    张鑫, 陈红汉, 孔令涛, 龙昭, 2020. 泌阳凹陷深凹区古流体压力演化与油气充注耦合关系. 地球科学, 45(5): 1769-1781. doi: 10.3799/dqkx.2019.187
    引用本文: 张鑫, 陈红汉, 孔令涛, 龙昭, 2020. 泌阳凹陷深凹区古流体压力演化与油气充注耦合关系. 地球科学, 45(5): 1769-1781. doi: 10.3799/dqkx.2019.187
    Zhang Xin, Chen Honghan, Kong Lingtao, Long Zhao, 2020. The Coupling Relationship between Paleofluid Pressure Evolution and Hydrocarbon-Charging Events in the Deep of Biyang Depression, Central China. Earth Science, 45(5): 1769-1781. doi: 10.3799/dqkx.2019.187
    Citation: Zhang Xin, Chen Honghan, Kong Lingtao, Long Zhao, 2020. The Coupling Relationship between Paleofluid Pressure Evolution and Hydrocarbon-Charging Events in the Deep of Biyang Depression, Central China. Earth Science, 45(5): 1769-1781. doi: 10.3799/dqkx.2019.187

    泌阳凹陷深凹区古流体压力演化与油气充注耦合关系

    doi: 10.3799/dqkx.2019.187
    基金项目: 

    国家重点自然科学基金项目 41730421

    中国石油化工股份有限公司“十三五”重大科技专项 ZDP1705

    详细信息
      作者简介:

      张鑫(1990-), 博士研究生, 主要从事油气成藏机理研究.ORCID:0000-0003-2986-8017.E-mail:zhangxin@cug.edu.cn

      通讯作者:

      陈红汉, E-mail:hhchen@cug.edu.cn

    • 中图分类号: P618

    The Coupling Relationship between Paleofluid Pressure Evolution and Hydrocarbon-Charging Events in the Deep of Biyang Depression, Central China

    • 摘要: 泌阳凹陷深凹区蕴含可观的岩性油气藏,现今压力大多显示为常压-弱超压系统.利用盆地数值模拟和流体包裹体热动力学模拟相结合,揭示了深凹区古压力演化历史.生烃历史显示泌阳凹陷持续埋藏到廖庄组沉积末期达到最大埋藏深度(约23.03 Ma)时,达到生烃高峰期;随后地层抬升,生烃强度减弱并趋近于停止.深凹区砂岩储层中检测到两种不同成分油包裹体,即成熟度低的橙黄色荧光油包裹体和成熟度相对较高的蓝绿色荧光油包裹体.包裹体均一温度结合埋藏史显示深凹区油气充注时间分别为35.4~30.3 Ma和27.8~26.5 Ma.盆地数值模拟显示深凹区从39.3 Ma开始压力持续增加,到约23.03 Ma时,即埋藏最深时发育显著的超压,压力系数可达1.5左右,之后超压减弱,演化至现今的常压-弱超压系统.包裹体热动力学模拟恢复的古压力也显示相似的演化趋势.总体上,生烃期,充注期以及超压形成期三者在时间上的耦合表明深凹区是由生烃增压下驱动两期油气充注以至形成现今的岩性油气藏.

       

    • 图  1  泌阳凹陷区域地质分布以及取样井

      Fig.  1.  Regional geological distribution and sampling wells in Biyang depression

      图  2  过泌阳凹陷全区的剖面以及部分已探明深凹区油气层

      Fig.  2.  Cross-section profile and proven oil and gas layers in Biyang depression

      图  3  泌阳凹陷B354井岩性、DST、泥岩声波、密度和电阻率

      Fig.  3.  The lithology, DST, mudstone acoustic, density and resistivity logging in the Well B354

      图  4  深凹区B78井模拟的置信图(a)和埋藏-热史图(b)

      Fig.  4.  The calibration (a) and burial-thermal history (b) in the Well B78

      图  5  深凹区BY1井模拟的置信图(a), 埋藏-热历史(b)以及生烃史(c)

      Fig.  5.  The calibration (a), burial-thermal history (b) and hydrocarbon generation history (c) in the Well BY1

      图  6  泌阳凹陷二维盆地模拟AA’测线沉积相填充结果

      Fig.  6.  Sedimentary facies profile of two-dimensional line AA' in Biyang depression

      图  7  泌阳凹陷二维盆地模拟AA’测线古压力演化剖面

      Fig.  7.  The paleo-pressure evolution profile of two-dimensional line AA' in Biyang depression

      图  8  泌阳凹陷深凹区砂岩储层检测到不同成熟度的油包裹体

      Fig.  8.  The different maturity oil inclusions in sandstone reservoir in the deep of Biyang depression

      图  9  深凹区油包裹体显微荧光光谱图(a)和油包裹体荧光主峰波长QF535与λmax关系(b)

      Fig.  9.  The microfluorescence spectra (a) and the relationship between main peak wavelength of fluorescence QF535 and λmax (b) by the oil inclusions in deep depression

      图  10  泌阳凹陷深凹区油气成藏时期

      Fig.  10.  The hydrocarbon accumulation period in the deep of Biyang depression

      图  11  流体包裹体古压力系数-时间散点图

      Fig.  11.  The paleo-pressure coefficient-time scatter diagram of fluid inclusions

      表  1  泌阳凹陷深凹区砂岩储层中油包裹体和盐水包裹体的测试结果

      Table  1.   The test results of the oil inclusion and brine inclusion in sandstone reservoir in the deep of Biyang depression

      井号 深度(m) 宿主矿物及产状 包裹体类型 成因 Th(℃) 荧光颜色
      B214 1 833.6 穿石英颗粒裂纹 次生 77.2~80.2/78.7 橙黄色
      伴生盐水 98.3~99.8/98.9
      1 846.8 石英颗粒内裂纹 次生 59.3~62.6/60.7 橙黄色
      盐水 83.6~92.0/87.1
      1 860 石英内裂纹 次生 69.5 蓝绿色
      盐水 100.6~109.3/106.1
      石英内裂纹 次生 73.2 橙黄色
      盐水 93.6~94.2/93.9
      B94 2 108.7~2 109.0 穿石英颗粒裂纹 次生 75.2~85.3/80.6 蓝绿色
      盐水 115.6~118.7/117.2(n=2)/92.9
      粒间方解石胶结物 原生 83.4~108.5/96.0 橙黄色
      93.9
      盐水 103.8~108.8/106.3
      B78 1 912.9 石英颗粒内裂纹 次生 80.1~84.6/82.0 蓝绿色
      伴生盐水 75.7~80.1/78.3
      B96 2 104.9 穿石英颗粒裂纹 次生 橙黄色
      伴生盐水 77.4~84.9/80.1(n=3)
      B197 2 867.5 穿石英颗粒裂纹 次生 99.1~105.8/97.7(n=4) 橙黄色
      盐水 104.1~116.5/108.8(n=5)
      石英颗粒次生加大边 原生 87.6~91.5/89.6(n=2) 橙黄色
      伴生盐水 104.5~116.8/109.6(n=5)
      3 212.2 石英颗粒次生加大边 原生 99.0~111.5/103.6(n=4) 橙黄色
      伴生盐水 122.9(n=1)
      B168 1 522.4 穿石英颗粒裂纹 次生 78.5(n=1) 橙黄色
      盐水 77.9~86.9/82.6(n=3)
      石英颗粒次生加大边 原生 80.9~85.0/83.0(n=2) 蓝绿色
      伴生盐水 105.1~107.3/106.2(n=2)
      1 664.3 穿石英颗粒裂纹 次生 58.9~63.1/61.0(n=3) 蓝绿色
      盐水 89.5~101.1/95.8(n=6)
      1 684.8 穿石英颗粒裂纹 次生 65.3(n=1) 蓝绿色
      盐水 93.9~98.7/96.3(n=3)
      下载: 导出CSV
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