岩性油气藏 ›› 2015, Vol. 27 ›› Issue (3): 87–93.doi: 10.3969/j.issn.1673-8926.2015.03.013

• 油气地质 • 上一篇    下一篇

泥页岩储层裂缝特征及其与“五性”之间的关系

闫建平1,2,言 语2,司马立强2,温丹妮2,温新房3,耿 斌4   

  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. 江苏油田勘探局 地质测井处,江苏 扬州 225002 ; 4. 中国石化胜利油田分公司地质科学研究院,山东 东营 257015
  • 出版日期:2015-05-26 发布日期:2015-05-26
  • 作者简介: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与研究工作。 地址:( 610500 )四川省成都市西南石油大学地球科学与技术学院。 E-mail : 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 )、四川省应用基础研究计划项目“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 )及西南石油大学校级科技基金项目“页岩气储层微观结构及岩石物理响应模拟研究”(编号: 2012XJZ004 )联合资助

Relationship between fracture characteristics and “ five-property ” of shale reservoir

YAN Jianping 1,2, YAN Yu 2, SIMA Liqiang 2, WEN Danni 2, WEN Xinfang 3 GENG Bin 4   

  1.  1. Sichuan Key Laboratory of Natural Gas Geology , Southwest Petroleum University , Chengdu 610500 , China ;2. School of Resources and Environment , Southwest Petroleum University , Chengdu 610500 , China ;3. Geological Logging Division , Jiangsu Petroleum Exploration Bureau , Yangzhou 225002 , Jiangsu , China ;4. Institute of Geoscience , Shengli Oilfield Company , Sinopec , Dongying 257015 , Shandong , China )
  • Online:2015-05-26 Published:2015-05-26

摘要:

泥页岩地层通常具有低孔、低渗特征,存在裂缝及裂缝发育程度均是其能够成为储层的决定性条件。 以苏北盆地阜宁组泥页岩地层为研究对象,研究裂缝特征及其与岩性、物性、含油性、电性及可压裂性(“五性”)之间的关系。 结果表明:裂缝普遍含油,发育裂隙的样品渗透率明显较高,一般都大于 10 mD,裂缝对改善泥页岩地层的渗透性及储集性起到了重要作用;含裂隙样品通常脆性矿物(方解石)含量较高,对应的岩性一般为灰质泥岩、含灰页岩及含灰泥岩;天然裂隙发育的层段杨氏模量较高、泊松比较低、脆性系数较高,页岩的脆性较强,通常易于压裂改造。利用测井响应特征可明显区分方解石充填裂缝和有油迹显示的无充填裂缝,可为识别有效泥页岩储层提供依据。

关键词: 泥页岩储层, 裂缝(裂隙), 渗透性, 脆性矿物, 可压裂性, 测井响应特征, 苏北盆地

Abstract:

Shale formations are typically characterized by low porosity and low permeability. While, the decisive condition of whether shale formations can be reservoirs is nothing but the existence and development of fracture. Taking shale formations of Funing Formation in Subei Basin as an example, this paper studied the relations of fracture characteristics with lithology, physical properties, oiliness, fracability and electric properties. During the research, petroliferous fractures are easy to found, and it is obvious that the permeability of fractured sample is higher than that of uncracked, which is greater than 10 mD in general. Fracture plays an important role in improving shale permeability and reservoir capabilities. Samples with fractures usually have higher content of calcite and the corresponding lithology is generally calcareous mudstone, limy shale and limy mudstone. The intervals which developed intrinsic fracture have high Young’s modulus, low Poisson’s ratio and high brittleness coefficient. The intervals’ brittleness is strong, and for this reason, these intervals are normally easy fracturing. Using logging response characteristics can easily distinguish fractures with calcite filled and no filling cracks accompany with oil trace. This result provides a basis for identifying effective shale reservoir

Key words: shale, fracture, permeability, brittle mineral, fracability, logging response characteristics, Subei Basin

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