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大庆长垣以东地区深层致密气储层成岩胶结作用及其对物性影响
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  • 英文篇名:Diagenesis and cementation of the deep tight gas reservoir and their influences on the physical properties in East Daqing Placanticline
  • 作者:王成
  • 英文作者:WANG Cheng;Exploration and Development Research Institute of Daqing Oilfield Co Ltd.;
  • 关键词:大庆长垣以东地区 ; 致密储层 ; 孔隙类型 ; 胶结作用 ; 砾状胶结 ; 浊沸石 ; 次生孔隙
  • 英文关键词:East Daqing Placanticline;;tight reservoir;;pore type;;cementation;;gravel-like cementation;;laumontite/sloanite;;secondary pore
  • 中文刊名:DQSK
  • 英文刊名:Petroleum Geology & Oilfield Development in Daqing
  • 机构:大庆油田有限责任公司勘探开发研究院;
  • 出版日期:2019-07-02 16:25
  • 出版单位:大庆石油地质与开发
  • 年:2019
  • 期:v.38;No.194
  • 基金:中国石油天然气股份公司重大科技专项“松北深层天然气富集规律、勘探技术研究与规模增储”(2011E-1203)
  • 语种:中文;
  • 页:DQSK201904021
  • 页数:9
  • CN:04
  • ISSN:23-1286/TE
  • 分类号:146-154
摘要
针对深层致密气优质储层孔隙类型及成因、胶结作用对物性的影响、次生孔隙分布等问题,依据岩石薄片、铸体薄片和扫描电镜等储层微观特征资料,开展了致密气砂岩储层孔隙成因、胶结作用类型和特征、胶结物成岩演化序列以及胶结作用与溶蚀作用对储层物性影响研究。结果表明:含浊沸石致密气储层浊沸石溶孔比例与面孔率之间具有较好的正相关关系,致密气储层碎屑石英具有"砾状胶结"现象,"砾状胶结"石英具有较好的抗压实性,对粒间孔隙的保存具有重要作用;致密气优质储层的"原生粒间孔"主要是砂岩在粒间孔基础上,孔隙内浊沸石胶结物(或凝灰质填隙物)被大部分溶蚀后形成"次生粒间孔隙",次生孔隙发育带与T_4断裂晚期活动部位有关,是深层致密气重要的勘探目标区。
        In the light of the following problems: the unclear pore types and their origins, the cementation influence on the physical properties and the secondary pore distribution etc. in the deep fine tight-gas reservoirs, with the help of the reservoir microscopic characteristic data including the rock thin section, casting slice, scanning electron microscopy and so on, the pore genesis of the tight-gas sandstone reservoir, cementation types and characteristics, diagenesis evolution sequence of the cements and influences of the cementation and dissolution on the reservoir physical properties were studied. The results show that the ratio of the dissolved pore in the laumontite has positive correlation with the ratio of the surface porosity for the tight gas reservoirs containing the laumontite, there exists"gravel-like cementation" phenomenon in the clastic quartz of the tight gas reservoir, the gravel-like cemented quartz has much better compaction resistance, which plays an important role in the preservation of the pores; on the basis of the intergranular pore of the sandstone, the "primary intergranular pore" of the high-quality tight gas reservoirs is most dissolved by the laumontite cements(or tuff fillings) in the pores and formed into the "secondary intergranular pore", the secondary pore development zone is related to the late active location of Fault T_4 and has become the important exploration target area for the deep tight gas.
引文
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