岩性油气藏 ›› 2017, Vol. 29 ›› Issue (3): 18–26.doi: 10.3969/j.issn.1673-8926.2017.03.003

• 油气地质 • 上一篇    下一篇

低渗透砂岩微孔特征与孔隙结构类型的关系——以东营凹陷南斜坡沙四段为例

闫建平1,2, 梁强2, 耿斌3, 赖富强4, 温丹妮5, 汪宙峰2   

  1. 1. 西南石油大学 天然气地质四川省重点实验室, 成都 610500;
    2. 西南石油大学 地球科学与技术学院, 成都 610500;
    3. 中国石化胜利油田分公司 勘探开发研究院, 山东 东营 257015;
    4. 重庆科技学院 复杂油气田勘探开发重庆市重点实验室, 重庆 401331;
    5. 中国石化西南油气工程有限公司 测井分公司, 成都 610500
  • 收稿日期:2016-09-08 修回日期:2016-11-06 出版日期:2017-05-21 发布日期:2017-05-21
  • 第一作者:闫建平(1980-),男,博士,副教授,主要从事测井沉积学、岩石物理及非常规储层测井评价方面的教学和科研工作。地址:(610500)四川省成都市新都区西南石油大学地球科学与技术学院。Email:yanjp_tj@163.com。
  • 基金资助:
    国家自然科学基金项目“页岩气储层微观结构及岩石物理响应数值模拟研究”（编号：41202110）、“基于成像测井的页岩气层可压裂性评价方法研究”（编号：41402118），四川省应用基础研究项目“泥页岩地层周期及高分辨率沉积旋回测井识别研究”（编号：2015JY0200）和四川省测绘地理信息局支撑课题“地理国情监测支撑下的山区公路沿线地质生态环境承载力研究”（编号：J2014ZC12）联合资助

Relationship between micro-pore characteristics and pore structure of low permeability sandstone: a case of the fourth member of Shahejie Formation in southern slope of Dongying Sag

YAN Jianping1,2, LIANG Qiang2, GENG Bin3, LAI Fuqiang4, WEN Danni5, WANG Zhoufeng2   

  1. 1. Sichuan Provincial Key Laboratory of Natural Gas Geology, Southwest Petroleum University, Chengdu 610500, China;
    2. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
    3. Research Institute of Exploration and Development, Shengli Oilfield Company, Sinopec, Dongying 257015, Shandong, China;
    4. Chongqing Key Laboratory of Complex Oil & Gas Field Exploration and Development, Chongqing University of Science & echnology, Chongqing 401331, China;
    5. Well Logging Branch, Southwest Petroleum Engineering Co., Ltd., Sinopec, Chengdu 610500, China
  • Received:2016-09-08 Revised:2016-11-06 Online:2017-05-21 Published:2017-05-21

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摘要： 低渗透砂岩已成为油气增储上产的重要勘探开发目标，但孔隙结构类型多样、微孔发育使得测井响应特征难以明显反映储层及其有效性。利用压汞、核磁共振、物性、薄片及CT等资料分析东营凹陷南斜坡沙四段（Es4）低渗透滩坝砂岩孔隙结构，并将其划分为三大类五小类，即：Ⅰ类（Ⅰ1和Ⅰ2）、Ⅱ类（Ⅱ1和Ⅱ2）和Ⅲ类。孔隙结构类型受控于矿物、粒径及成岩作用等的综合影响，微孔（孔喉半径<0.024 8 μm）含量及其特征是造成孔隙结构类型差异的重要因素。在此基础上，分析矿物含量、粒径、电性与微孔含量的关系，发现矿物、粒径影响微孔含量及特征，且微孔含量与电性特征关系密切。利用测井曲线对低渗透砂岩微孔含量变化的敏感性，有助于在井筒剖面进行孔隙结构类型划分及识别有效储层。

关键词: 致密砂岩气, 地质特征, 含水饱和度, 压力系统, 吸附气, 苏里格气田, 鄂尔多斯盆地

Abstract: The low permeability sandstone reservoir has become an important exploration target, but the variety of micro-pore structure makes the logging response characteristics difficult to reflect reservoir features clearly. The data of mercury injection, nuclear magnetic resonance (NMR), physical properties, thin sections and CT were used to analyze the pore structure of low permeability beach bar sandstone of the fourth member of Shahejie Formation (Es4) in southern slope of Dongying Sag. The pore structure were divided into three types and five subtypes:typeⅠ (Ⅰ1 and Ⅰ2), type II (Ⅱ1 and Ⅱ2)and type Ⅲ. The pore structure type is controlled by mineral content, grain size and diagenesis. The volume and features of micropores (pore throat radius less than 0.024 8 μm) are important factors that cause the differences of pore structure types. The relationships among micropore volume, mineral content, grain size and electric properties were analyzed. It is found that mineral content and grain size affect micropore volume and features. In addition, the micropore volume is closely related to the electric properties. Logging curves are sensitive to the change of micropore volume, so it is helpful for dividing pore structure type in wellbore and identifying effective reservoirs.

Key words: tight sandstone gas, geologic characteristics, water saturation, pressure system, adsorbed gas, Sulige Gasfield, Ordos Basin

中图分类号: 

  • TE122
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