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鄂尔多斯盆地什社地区延长组长31储层特征及评价

喻雅敏 文志刚

喻雅敏, 文志刚, 2017. 鄂尔多斯盆地什社地区延长组长31储层特征及评价. 地质力学学报, 23 (4): 577-584.
引用本文: 喻雅敏, 文志刚, 2017. 鄂尔多斯盆地什社地区延长组长31储层特征及评价. 地质力学学报, 23 (4): 577-584.
YU Yamin, WEN Zhigang, 2017. CHARACTERISTICS AND COMPREHENSIVE EVALUATION OF CHANG 31 RESERVOIRS OF YANCHANG GROUP IN SHISHE AREA, ORDOS BASIN. Journal of Geomechanics, 23 (4): 577-584.
Citation: YU Yamin, WEN Zhigang, 2017. CHARACTERISTICS AND COMPREHENSIVE EVALUATION OF CHANG 31 RESERVOIRS OF YANCHANG GROUP IN SHISHE AREA, ORDOS BASIN. Journal of Geomechanics, 23 (4): 577-584.

鄂尔多斯盆地什社地区延长组长31储层特征及评价

基金项目: 

"十二五"国家科技重大专项项目 2011ZX05033-004

中国地质调查局地质调查项目 1212011120965

中国地质调查局地质调查项目 1212011220762

详细信息
    作者简介:

    喻雅敏(1992-), 女, 硕士研究生, 主要从事油气地质综合研究.E-mail:542998916@qq.com

    通讯作者:

    文志刚(1965-), 男, 教授, 主要从事油气地球化学和石油地质综合研究.E-mail:wzg728@sina.com

  • 中图分类号: TE122.2

CHARACTERISTICS AND COMPREHENSIVE EVALUATION OF CHANG 31 RESERVOIRS OF YANCHANG GROUP IN SHISHE AREA, ORDOS BASIN

  • 摘要: 本文依据岩石薄片、铸体薄片、物性分析、压汞曲线等资料,对鄂尔多斯盆地什社地区延长组长31储层特征进行了深入的研究。研究分析认为:什社地区长31储层主要为长石岩屑砂岩和岩屑长石砂岩,属于低孔—特低孔、特低渗—超低渗储层,储集空间主要为粒间孔和长石溶孔。储层的分布主要受沉积相带的控制,后期成岩作用对储层的储集性能也有一定的改造。综合储层分类评价标准,将研究区储层分为3类,什社地区长31油层组以Ⅰ类、Ⅱ类储层为主。

     

  • 图  1  研究区与采样点位置图

    Figure  1.  Location map of the study area and sample collection sites

    图  2  什社地区长31砂岩分类三角图

    Figure  2.  The sandstone classification of Chang 31 in Shishe area

    图  3  什社地区长31储层孔隙类型

    Figure  3.  Pore types of Chang 31 reservoirs in Shishe area

    图  4  什社地区长31储层主要发育的喉道类型

    Figure  4.  Main throat types of Chang 31 reservoirs in Shishe area

    图  5  什社地区长31毛细管压力曲线

    Figure  5.  Capillary pressure curves of Chang31 in Shishe area

    图  6  什社地区长31储层孔隙度、渗透率与砂地比相关性

    Figure  6.  Correlation between porosity, permeability and sand-stratum ratio respectively of Chang 31 reservoirs in Shishe area

    图  7  什社地区长31储层铸体薄片和电镜扫描照片

    a—西86井1531.43 m长31颗粒凹凸接触,压实作用强烈,致密结构特征;b—西63井1483.6 m长31塑性岩屑强烈变形,具压溶现象,少量高岭石充填孔隙,可见孔不发育; c—西78井1416.0 m长31少量自生高岭石及绿泥石充填孔隙;d—西281井1431.14 m长31自生高岭石粘土充填粒间孔喉生长;e—西78井1416.0 m长31部分孔隙中充填自生铁白云石;f—西63井1483.6 m长31云母及塑性岩屑变形,石英加大常见,铁白云石和高岭石充填孔隙,具粒间孔及长石溶孔;g—西78井1416.0 m长31加大状石英普遍胶结充填残余孔喉连通形态;h—西89井1455.14 m长31全貌,粒间残余孔较发育,石英次生加大普遍可见;i—板19井1602.6 m长31颗粒溶蚀孔;j—西90井1502.1 m长31粒间孔、溶孔

    Figure  7.  Casting thin section and SEM photographs of Chang 31 reservoirs in Shishe area

    图  8  什社地区长31成岩相平面图

    Figure  8.  Diagenetic facies of Chang 31 in Shishe area

    图  9  什社地区长31储层分类综合评价

    Figure  9.  Classitied and comprehensive evaluation of Chang 31 reservoirs in Shishe area

    表  1  什社地区长31砂岩储层孔隙类型

    Table  1.   Pore types of Chang 31 sandstone reservoirs in Shishe area

    孔隙类型面孔率/%所占面孔率
    比例/%
    最大值最小值平均值
    粒间孔100.35.463.29
    长石溶孔3.20.31.821.53
    岩屑溶孔1.90.20.66.94
    其它2.50.10.28.24
    下载: 导出CSV

    表  2  什社地区长31储层分类评价表

    Table  2.   Classification evaluation of Chang 31 reservoir in Shishe area

    分类标准
    沉积微相水下分流河道河道侧翼、河口坝分流间湾
    渗透率/mD≥3.03.0~1.01.0~0.5
    孔隙度/%≥12.012.0~10.010.0~8.0
    孔隙类型粒间孔—溶孔粒间孔—溶孔、微孔微孔
    储层评价优质储层相对优质储层一般储层
    下载: 导出CSV
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  • 收稿日期:  2017-05-26
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